Merge branch 'master' into refactor-mesh-material-index-genericrefactor-mesh-material-index-generic

235 files changed, 5202 insertions, 3497 deletions

diff --git a/intern/cycles/blender/shader.cpp b/intern/cycles/blender/shader.cpp
index 04eb1576330..9505f4ba58f 100644
--- a/intern/cycles/blender/shader.cpp
+++ b/intern/cycles/blender/shader.cpp
@@ -350,6 +350,33 @@ static ShaderNode *add_node(Scene *scene,
     mix->set_use_clamp(b_mix_node.use_clamp());
     node = mix;
   }
+  else if (b_node.is_a(&RNA_ShaderNodeMix)) {
+    BL::ShaderNodeMix b_mix_node(b_node);
+    if (b_mix_node.data_type() == BL::ShaderNodeMix::data_type_VECTOR) {
+      if (b_mix_node.factor_mode() == BL::ShaderNodeMix::factor_mode_UNIFORM) {
+        MixVectorNode *mix_node = graph->create_node<MixVectorNode>();
+        mix_node->set_use_clamp(b_mix_node.clamp_factor());
+        node = mix_node;
+      }
+      else {
+        MixVectorNonUniformNode *mix_node = graph->create_node<MixVectorNonUniformNode>();
+        mix_node->set_use_clamp(b_mix_node.clamp_factor());
+        node = mix_node;
+      }
+    }
+    else if (b_mix_node.data_type() == BL::ShaderNodeMix::data_type_RGBA) {
+      MixColorNode *mix_node = graph->create_node<MixColorNode>();
+      mix_node->set_blend_type((NodeMix)b_mix_node.blend_type());
+      mix_node->set_use_clamp(b_mix_node.clamp_factor());
+      mix_node->set_use_clamp_result(b_mix_node.clamp_result());
+      node = mix_node;
+    }
+    else {
+      MixFloatNode *mix_node = graph->create_node<MixFloatNode>();
+      mix_node->set_use_clamp(b_mix_node.clamp_factor());
+      node = mix_node;
+    }
+  }
   else if (b_node.is_a(&RNA_ShaderNodeSeparateRGB)) {
     node = graph->create_node<SeparateRGBNode>();
   }
@@ -1072,7 +1099,9 @@ static bool node_use_modified_socket_name(ShaderNode *node)
   return true;
 }
 
-static ShaderInput *node_find_input_by_name(ShaderNode *node, BL::NodeSocket &b_socket)
+static ShaderInput *node_find_input_by_name(BL::Node b_node,
+                                            ShaderNode *node,
+                                            BL::NodeSocket &b_socket)
 {
   string name = b_socket.identifier();
   ShaderInput *input = node->input(name.c_str());
@@ -1082,6 +1111,35 @@ static ShaderInput *node_find_input_by_name(ShaderNode *node, BL::NodeSocket &b_
     if (string_startswith(name, "Shader")) {
       string_replace(name, "Shader", "Closure");
     }
+
+    /* Map mix node internal name for shader. */
+    if (b_node.is_a(&RNA_ShaderNodeMix)) {
+      if (string_endswith(name, "Factor_Float")) {
+        string_replace(name, "Factor_Float", "Factor");
+      }
+      else if (string_endswith(name, "Factor_Vector")) {
+        string_replace(name, "Factor_Vector", "Factor");
+      }
+      else if (string_endswith(name, "A_Float")) {
+        string_replace(name, "A_Float", "A");
+      }
+      else if (string_endswith(name, "B_Float")) {
+        string_replace(name, "B_Float", "B");
+      }
+      else if (string_endswith(name, "A_Color")) {
+        string_replace(name, "A_Color", "A");
+      }
+      else if (string_endswith(name, "B_Color")) {
+        string_replace(name, "B_Color", "B");
+      }
+      else if (string_endswith(name, "A_Vector")) {
+        string_replace(name, "A_Vector", "A");
+      }
+      else if (string_endswith(name, "B_Vector")) {
+        string_replace(name, "B_Vector", "B");
+      }
+    }
+
     input = node->input(name.c_str());
 
     if (!input) {
@@ -1111,7 +1169,9 @@ static ShaderInput *node_find_input_by_name(ShaderNode *node, BL::NodeSocket &b_
   return input;
 }
 
-static ShaderOutput *node_find_output_by_name(ShaderNode *node, BL::NodeSocket &b_socket)
+static ShaderOutput *node_find_output_by_name(BL::Node b_node,
+                                              ShaderNode *node,
+                                              BL::NodeSocket &b_socket)
 {
   string name = b_socket.identifier();
   ShaderOutput *output = node->output(name.c_str());
@@ -1122,6 +1182,21 @@ static ShaderOutput *node_find_output_by_name(ShaderNode *node, BL::NodeSocket &
       name = "Closure";
       output = node->output(name.c_str());
     }
+    /* Map internal name for shader. */
+    if (b_node.is_a(&RNA_ShaderNodeMix)) {
+      if (string_endswith(name, "Result_Float")) {
+        string_replace(name, "Result_Float", "Result");
+        output = node->output(name.c_str());
+      }
+      else if (string_endswith(name, "Result_Color")) {
+        string_replace(name, "Result_Color", "Result");
+        output = node->output(name.c_str());
+      }
+      else if (string_endswith(name, "Result_Vector")) {
+        string_replace(name, "Result_Vector", "Result");
+        output = node->output(name.c_str());
+      }
+    }
   }
 
   return output;
@@ -1267,7 +1342,11 @@ static void add_nodes(Scene *scene,
       if (node) {
         /* map node sockets for linking */
         for (BL::NodeSocket &b_input : b_node.inputs) {
-          ShaderInput *input = node_find_input_by_name(node, b_input);
+          if (b_input.is_unavailable()) {
+            /* Skip unavailable sockets. */
+            continue;
+          }
+          ShaderInput *input = node_find_input_by_name(b_node, node, b_input);
           if (!input) {
             /* XXX should not happen, report error? */
             continue;
@@ -1277,7 +1356,11 @@ static void add_nodes(Scene *scene,
           set_default_value(input, b_input, b_data, b_ntree);
         }
         for (BL::NodeSocket &b_output : b_node.outputs) {
-          ShaderOutput *output = node_find_output_by_name(node, b_output);
+          if (b_output.is_unavailable()) {
+            /* Skip unavailable sockets. */
+            continue;
+          }
+          ShaderOutput *output = node_find_output_by_name(b_node, node, b_output);
           if (!output) {
             /* XXX should not happen, report error? */
             continue;
diff --git a/intern/cycles/kernel/osl/shaders/CMakeLists.txt b/intern/cycles/kernel/osl/shaders/CMakeLists.txt
index 741bce7c399..c79af3f6112 100644
--- a/intern/cycles/kernel/osl/shaders/CMakeLists.txt
+++ b/intern/cycles/kernel/osl/shaders/CMakeLists.txt
@@ -57,6 +57,10 @@ set(SRC_OSL
   node_math.osl
   node_mix.osl
   node_mix_closure.osl
+  node_mix_color.osl
+  node_mix_float.osl
+  node_mix_vector.osl
+  node_mix_vector_non_uniform.osl
   node_musgrave_texture.osl
   node_noise_texture.osl
   node_normal.osl
@@ -109,6 +113,7 @@ file(GLOB SRC_OSL_HEADER_DIST ${OSL_SHADER_DIR}/*.h)
 
 set(SRC_OSL_HEADERS
   node_color.h
+  node_color_blend.h
   node_fresnel.h
   node_hash.h
   node_math.h
diff --git a/intern/cycles/kernel/osl/shaders/node_color_blend.h b/intern/cycles/kernel/osl/shaders/node_color_blend.h
new file mode 100644
index 00000000000..ab4b4809a97
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_color_blend.h
@@ -0,0 +1,264 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+color node_mix_blend(float t, color col1, color col2)
+{
+  return mix(col1, col2, t);
+}
+
+color node_mix_add(float t, color col1, color col2)
+{
+  return mix(col1, col1 + col2, t);
+}
+
+color node_mix_mul(float t, color col1, color col2)
+{
+  return mix(col1, col1 * col2, t);
+}
+
+color node_mix_screen(float t, color col1, color col2)
+{
+  float tm = 1.0 - t;
+
+  return color(1.0) - (color(tm) + t * (color(1.0) - col2)) * (color(1.0) - col1);
+}
+
+color node_mix_overlay(float t, color col1, color col2)
+{
+  float tm = 1.0 - t;
+
+  color outcol = col1;
+
+  if (outcol[0] < 0.5)
+    outcol[0] *= tm + 2.0 * t * col2[0];
+  else
+    outcol[0] = 1.0 - (tm + 2.0 * t * (1.0 - col2[0])) * (1.0 - outcol[0]);
+
+  if (outcol[1] < 0.5)
+    outcol[1] *= tm + 2.0 * t * col2[1];
+  else
+    outcol[1] = 1.0 - (tm + 2.0 * t * (1.0 - col2[1])) * (1.0 - outcol[1]);
+
+  if (outcol[2] < 0.5)
+    outcol[2] *= tm + 2.0 * t * col2[2];
+  else
+    outcol[2] = 1.0 - (tm + 2.0 * t * (1.0 - col2[2])) * (1.0 - outcol[2]);
+
+  return outcol;
+}
+
+color node_mix_sub(float t, color col1, color col2)
+{
+  return mix(col1, col1 - col2, t);
+}
+
+color node_mix_div(float t, color col1, color col2)
+{
+  float tm = 1.0 - t;
+
+  color outcol = col1;
+
+  if (col2[0] != 0.0)
+    outcol[0] = tm * outcol[0] + t * outcol[0] / col2[0];
+  if (col2[1] != 0.0)
+    outcol[1] = tm * outcol[1] + t * outcol[1] / col2[1];
+  if (col2[2] != 0.0)
+    outcol[2] = tm * outcol[2] + t * outcol[2] / col2[2];
+
+  return outcol;
+}
+
+color node_mix_diff(float t, color col1, color col2)
+{
+  return mix(col1, abs(col1 - col2), t);
+}
+
+color node_mix_dark(float t, color col1, color col2)
+{
+  return mix(col1, min(col1, col2), t);
+}
+
+color node_mix_light(float t, color col1, color col2)
+{
+  return mix(col1, max(col1, col2), t);
+}
+
+color node_mix_dodge(float t, color col1, color col2)
+{
+  color outcol = col1;
+
+  if (outcol[0] != 0.0) {
+    float tmp = 1.0 - t * col2[0];
+    if (tmp <= 0.0)
+      outcol[0] = 1.0;
+    else if ((tmp = outcol[0] / tmp) > 1.0)
+      outcol[0] = 1.0;
+    else
+      outcol[0] = tmp;
+  }
+  if (outcol[1] != 0.0) {
+    float tmp = 1.0 - t * col2[1];
+    if (tmp <= 0.0)
+      outcol[1] = 1.0;
+    else if ((tmp = outcol[1] / tmp) > 1.0)
+      outcol[1] = 1.0;
+    else
+      outcol[1] = tmp;
+  }
+  if (outcol[2] != 0.0) {
+    float tmp = 1.0 - t * col2[2];
+    if (tmp <= 0.0)
+      outcol[2] = 1.0;
+    else if ((tmp = outcol[2] / tmp) > 1.0)
+      outcol[2] = 1.0;
+    else
+      outcol[2] = tmp;
+  }
+
+  return outcol;
+}
+
+color node_mix_burn(float t, color col1, color col2)
+{
+  float tmp, tm = 1.0 - t;
+
+  color outcol = col1;
+
+  tmp = tm + t * col2[0];
+  if (tmp <= 0.0)
+    outcol[0] = 0.0;
+  else if ((tmp = (1.0 - (1.0 - outcol[0]) / tmp)) < 0.0)
+    outcol[0] = 0.0;
+  else if (tmp > 1.0)
+    outcol[0] = 1.0;
+  else
+    outcol[0] = tmp;
+
+  tmp = tm + t * col2[1];
+  if (tmp <= 0.0)
+    outcol[1] = 0.0;
+  else if ((tmp = (1.0 - (1.0 - outcol[1]) / tmp)) < 0.0)
+    outcol[1] = 0.0;
+  else if (tmp > 1.0)
+    outcol[1] = 1.0;
+  else
+    outcol[1] = tmp;
+
+  tmp = tm + t * col2[2];
+  if (tmp <= 0.0)
+    outcol[2] = 0.0;
+  else if ((tmp = (1.0 - (1.0 - outcol[2]) / tmp)) < 0.0)
+    outcol[2] = 0.0;
+  else if (tmp > 1.0)
+    outcol[2] = 1.0;
+  else
+    outcol[2] = tmp;
+
+  return outcol;
+}
+
+color node_mix_hue(float t, color col1, color col2)
+{
+  color outcol = col1;
+  color hsv2 = rgb_to_hsv(col2);
+
+  if (hsv2[1] != 0.0) {
+    color hsv = rgb_to_hsv(outcol);
+    hsv[0] = hsv2[0];
+    color tmp = hsv_to_rgb(hsv);
+
+    outcol = mix(outcol, tmp, t);
+  }
+
+  return outcol;
+}
+
+color node_mix_sat(float t, color col1, color col2)
+{
+  float tm = 1.0 - t;
+
+  color outcol = col1;
+
+  color hsv = rgb_to_hsv(outcol);
+
+  if (hsv[1] != 0.0) {
+    color hsv2 = rgb_to_hsv(col2);
+
+    hsv[1] = tm * hsv[1] + t * hsv2[1];
+    outcol = hsv_to_rgb(hsv);
+  }
+
+  return outcol;
+}
+
+color node_mix_val(float t, color col1, color col2)
+{
+  float tm = 1.0 - t;
+
+  color hsv = rgb_to_hsv(col1);
+  color hsv2 = rgb_to_hsv(col2);
+
+  hsv[2] = tm * hsv[2] + t * hsv2[2];
+
+  return hsv_to_rgb(hsv);
+}
+
+color node_mix_color(float t, color col1, color col2)
+{
+  color outcol = col1;
+  color hsv2 = rgb_to_hsv(col2);
+
+  if (hsv2[1] != 0.0) {
+    color hsv = rgb_to_hsv(outcol);
+    hsv[0] = hsv2[0];
+    hsv[1] = hsv2[1];
+    color tmp = hsv_to_rgb(hsv);
+
+    outcol = mix(outcol, tmp, t);
+  }
+
+  return outcol;
+}
+
+color node_mix_soft(float t, color col1, color col2)
+{
+  float tm = 1.0 - t;
+
+  color one = color(1.0);
+  color scr = one - (one - col2) * (one - col1);
+
+  return tm * col1 + t * ((one - col1) * col2 * col1 + col1 * scr);
+}
+
+color node_mix_linear(float t, color col1, color col2)
+{
+  color outcol = col1;
+
+  if (col2[0] > 0.5)
+    outcol[0] = col1[0] + t * (2.0 * (col2[0] - 0.5));
+  else
+    outcol[0] = col1[0] + t * (2.0 * (col2[0]) - 1.0);
+
+  if (col2[1] > 0.5)
+    outcol[1] = col1[1] + t * (2.0 * (col2[1] - 0.5));
+  else
+    outcol[1] = col1[1] + t * (2.0 * (col2[1]) - 1.0);
+
+  if (col2[2] > 0.5)
+    outcol[2] = col1[2] + t * (2.0 * (col2[2] - 0.5));
+  else
+    outcol[2] = col1[2] + t * (2.0 * (col2[2]) - 1.0);
+
+  return outcol;
+}
+
+color node_mix_clamp(color col)
+{
+  color outcol = col;
+
+  outcol[0] = clamp(col[0], 0.0, 1.0);
+  outcol[1] = clamp(col[1], 0.0, 1.0);
+  outcol[2] = clamp(col[2], 0.0, 1.0);
+
+  return outcol;
+}
diff --git a/intern/cycles/kernel/osl/shaders/node_mix_color.osl b/intern/cycles/kernel/osl/shaders/node_mix_color.osl
new file mode 100644
index 00000000000..3ddd89ed306
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_mix_color.osl
@@ -0,0 +1,57 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+#include "node_color.h"
+#include "node_color_blend.h"
+#include "stdcycles.h"
+
+shader node_mix_color(string blend_type = "mix",
+                      int use_clamp = 0,
+                      int use_clamp_result = 0,
+                      float Factor = 0.5,
+                      color A = 0.0,
+                      color B = 0.0,
+                      output color Result = 0.0)
+{
+  float t = (use_clamp) ? clamp(Factor, 0.0, 1.0) : Factor;
+
+  if (blend_type == "mix")
+    Result = mix(A, B, t);
+  if (blend_type == "add")
+    Result = node_mix_add(t, A, B);
+  if (blend_type == "multiply")
+    Result = node_mix_mul(t, A, B);
+  if (blend_type == "screen")
+    Result = node_mix_screen(t, A, B);
+  if (blend_type == "overlay")
+    Result = node_mix_overlay(t, A, B);
+  if (blend_type == "subtract")
+    Result = node_mix_sub(t, A, B);
+  if (blend_type == "divide")
+    Result = node_mix_div(t, A, B);
+  if (blend_type == "difference")
+    Result = node_mix_diff(t, A, B);
+  if (blend_type == "darken")
+    Result = node_mix_dark(t, A, B);
+  if (blend_type == "lighten")
+    Result = node_mix_light(t, A, B);
+  if (blend_type == "dodge")
+    Result = node_mix_dodge(t, A, B);
+  if (blend_type == "burn")
+    Result = node_mix_burn(t, A, B);
+  if (blend_type == "hue")
+    Result = node_mix_hue(t, A, B);
+  if (blend_type == "saturation")
+    Result = node_mix_sat(t, A, B);
+  if (blend_type == "value")
+    Result = node_mix_val(t, A, B);
+  if (blend_type == "color")
+    Result = node_mix_color(t, A, B);
+  if (blend_type == "soft_light")
+    Result = node_mix_soft(t, A, B);
+  if (blend_type == "linear_light")
+    Result = node_mix_linear(t, A, B);
+
+  if (use_clamp_result)
+    Result = clamp(Result, 0.0, 1.0);
+}
diff --git a/intern/cycles/kernel/osl/shaders/node_mix_float.osl b/intern/cycles/kernel/osl/shaders/node_mix_float.osl
new file mode 100644
index 00000000000..fdc7b4eff6e
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_mix_float.osl
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+#include "stdcycles.h"
+
+shader node_mix_float(
+    int use_clamp = 0, float Factor = 0.5, float A = 0.0, float B = 0.0, output float Result = 0.0)
+{
+  float t = (use_clamp) ? clamp(Factor, 0.0, 1.0) : Factor;
+  Result = mix(A, B, t);
+}
diff --git a/intern/cycles/kernel/osl/shaders/node_mix_vector.osl b/intern/cycles/kernel/osl/shaders/node_mix_vector.osl
new file mode 100644
index 00000000000..d76396afb0d
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_mix_vector.osl
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+#include "stdcycles.h"
+
+shader node_mix_vector(int use_clamp = 0,
+                       float Factor = 0.5,
+                       vector A = 0.0,
+                       vector B = 0.0,
+                       output vector Result = 0.0)
+{
+  float t = (use_clamp) ? clamp(Factor, 0.0, 1.0) : Factor;
+  Result = mix(A, B, t);
+}
diff --git a/intern/cycles/kernel/osl/shaders/node_mix_vector_non_uniform.osl b/intern/cycles/kernel/osl/shaders/node_mix_vector_non_uniform.osl
new file mode 100644
index 00000000000..217856bcf2a
--- /dev/null
+++ b/intern/cycles/kernel/osl/shaders/node_mix_vector_non_uniform.osl
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+#include "stdcycles.h"
+
+shader node_mix_vector_non_uniform(int use_clamp = 0,
+                                   vector Factor = 0.5,
+                                   vector A = 0.0,
+                                   vector B = 0.0,
+                                   output vector Result = 0.0)
+{
+  vector t = (use_clamp) ? clamp(Factor, 0.0, 1.0) : Factor;
+  Result = mix(A, B, t);
+}
diff --git a/intern/cycles/kernel/svm/color_util.h b/intern/cycles/kernel/svm/color_util.h
index 41f44378ff0..96adb6fd64c 100644
--- a/intern/cycles/kernel/svm/color_util.h
+++ b/intern/cycles/kernel/svm/color_util.h
@@ -247,10 +247,8 @@ ccl_device float3 svm_mix_clamp(float3 col)
   return saturate(col);
 }
 
-ccl_device_noinline_cpu float3 svm_mix(NodeMix type, float fac, float3 c1, float3 c2)
+ccl_device_noinline_cpu float3 svm_mix(NodeMix type, float t, float3 c1, float3 c2)
 {
-  float t = saturatef(fac);
-
   switch (type) {
     case NODE_MIX_BLEND:
       return svm_mix_blend(t, c1, c2);
@@ -282,7 +280,7 @@ ccl_device_noinline_cpu float3 svm_mix(NodeMix type, float fac, float3 c1, float
       return svm_mix_sat(t, c1, c2);
     case NODE_MIX_VAL:
       return svm_mix_val(t, c1, c2);
-    case NODE_MIX_COLOR:
+    case NODE_MIX_COL:
       return svm_mix_color(t, c1, c2);
     case NODE_MIX_SOFT:
       return svm_mix_soft(t, c1, c2);
@@ -295,6 +293,12 @@ ccl_device_noinline_cpu float3 svm_mix(NodeMix type, float fac, float3 c1, float
   return make_float3(0.0f, 0.0f, 0.0f);
 }
 
+ccl_device_noinline_cpu float3 svm_mix_clamped_factor(NodeMix type, float t, float3 c1, float3 c2)
+{
+  float fac = saturatef(t);
+  return svm_mix(type, fac, c1, c2);
+}
+
 ccl_device_inline float3 svm_brightness_contrast(float3 color, float brightness, float contrast)
 {
   float a = 1.0f + contrast;
diff --git a/intern/cycles/kernel/svm/mix.h b/intern/cycles/kernel/svm/mix.h
index a9796096410..ead2fc44685 100644
--- a/intern/cycles/kernel/svm/mix.h
+++ b/intern/cycles/kernel/svm/mix.h
@@ -21,10 +21,94 @@ ccl_device_noinline int svm_node_mix(KernelGlobals kg,
   float fac = stack_load_float(stack, fac_offset);
   float3 c1 = stack_load_float3(stack, c1_offset);
   float3 c2 = stack_load_float3(stack, c2_offset);
-  float3 result = svm_mix((NodeMix)node1.y, fac, c1, c2);
+  float3 result = svm_mix_clamped_factor((NodeMix)node1.y, fac, c1, c2);
 
   stack_store_float3(stack, node1.z, result);
   return offset;
 }
 
+ccl_device_noinline void svm_node_mix_color(ccl_private ShaderData *sd,
+                                            ccl_private float *stack,
+                                            uint options,
+                                            uint input_offset,
+                                            uint result_offset)
+{
+  uint use_clamp, blend_type, use_clamp_result;
+  uint fac_in_stack_offset, a_in_stack_offset, b_in_stack_offset;
+  svm_unpack_node_uchar3(options, &use_clamp, &blend_type, &use_clamp_result);
+  svm_unpack_node_uchar3(
+      input_offset, &fac_in_stack_offset, &a_in_stack_offset, &b_in_stack_offset);
+
+  float t = stack_load_float(stack, fac_in_stack_offset);
+  if (use_clamp > 0) {
+    t = saturatef(t);
+  }
+  float3 a = stack_load_float3(stack, a_in_stack_offset);
+  float3 b = stack_load_float3(stack, b_in_stack_offset);
+  float3 result = svm_mix((NodeMix)blend_type, t, a, b);
+  if (use_clamp_result) {
+    result = saturate(result);
+  }
+  stack_store_float3(stack, result_offset, result);
+}
+
+ccl_device_noinline void svm_node_mix_float(ccl_private ShaderData *sd,
+                                            ccl_private float *stack,
+                                            uint use_clamp,
+                                            uint input_offset,
+                                            uint result_offset)
+{
+  uint fac_in_stack_offset, a_in_stack_offset, b_in_stack_offset;
+  svm_unpack_node_uchar3(
+      input_offset, &fac_in_stack_offset, &a_in_stack_offset, &b_in_stack_offset);
+
+  float t = stack_load_float(stack, fac_in_stack_offset);
+  if (use_clamp > 0) {
+    t = saturatef(t);
+  }
+  float a = stack_load_float(stack, a_in_stack_offset);
+  float b = stack_load_float(stack, b_in_stack_offset);
+  float result = a * (1 - t) + b * t;
+
+  stack_store_float(stack, result_offset, result);
+}
+
+ccl_device_noinline void svm_node_mix_vector(ccl_private ShaderData *sd,
+                                             ccl_private float *stack,
+                                             uint input_offset,
+                                             uint result_offset)
+{
+  uint use_clamp, fac_in_stack_offset, a_in_stack_offset, b_in_stack_offset;
+  svm_unpack_node_uchar4(
+      input_offset, &use_clamp, &fac_in_stack_offset, &a_in_stack_offset, &b_in_stack_offset);
+
+  float t = stack_load_float(stack, fac_in_stack_offset);
+  if (use_clamp > 0) {
+    t = saturatef(t);
+  }
+  float3 a = stack_load_float3(stack, a_in_stack_offset);
+  float3 b = stack_load_float3(stack, b_in_stack_offset);
+  float3 result = a * (one_float3() - t) + b * t;
+  stack_store_float3(stack, result_offset, result);
+}
+
+ccl_device_noinline void svm_node_mix_vector_non_uniform(ccl_private ShaderData *sd,
+                                                         ccl_private float *stack,
+                                                         uint input_offset,
+                                                         uint result_offset)
+{
+  uint use_clamp, fac_in_stack_offset, a_in_stack_offset, b_in_stack_offset;
+  svm_unpack_node_uchar4(
+      input_offset, &use_clamp, &fac_in_stack_offset, &a_in_stack_offset, &b_in_stack_offset);
+
+  float3 t = stack_load_float3(stack, fac_in_stack_offset);
+  if (use_clamp > 0) {
+    t = saturate(t);
+  }
+  float3 a = stack_load_float3(stack, a_in_stack_offset);
+  float3 b = stack_load_float3(stack, b_in_stack_offset);
+  float3 result = a * (one_float3() - t) + b * t;
+  stack_store_float3(stack, result_offset, result);
+}
+
 CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/svm/node_types_template.h b/intern/cycles/kernel/svm/node_types_template.h
index 39d279be4cb..aab9b9f1158 100644
--- a/intern/cycles/kernel/svm/node_types_template.h
+++ b/intern/cycles/kernel/svm/node_types_template.h
@@ -103,6 +103,10 @@ SHADER_NODE_TYPE(NODE_AOV_START)
 SHADER_NODE_TYPE(NODE_AOV_COLOR)
 SHADER_NODE_TYPE(NODE_AOV_VALUE)
 SHADER_NODE_TYPE(NODE_FLOAT_CURVE)
+SHADER_NODE_TYPE(NODE_MIX_COLOR)
+SHADER_NODE_TYPE(NODE_MIX_FLOAT)
+SHADER_NODE_TYPE(NODE_MIX_VECTOR)
+SHADER_NODE_TYPE(NODE_MIX_VECTOR_NON_UNIFORM)
 
 /* Padding for struct alignment. */
 SHADER_NODE_TYPE(NODE_PAD1)
diff --git a/intern/cycles/kernel/svm/svm.h b/intern/cycles/kernel/svm/svm.h
index 9d6d3e9222c..3ca632c5f0b 100644
--- a/intern/cycles/kernel/svm/svm.h
+++ b/intern/cycles/kernel/svm/svm.h
@@ -585,6 +585,18 @@ ccl_device void svm_eval_nodes(KernelGlobals kg,
       SVM_CASE(NODE_AOV_VALUE)
       svm_node_aov_value<node_feature_mask>(kg, state, sd, stack, node, render_buffer);
       break;
+      SVM_CASE(NODE_MIX_COLOR)
+      svm_node_mix_color(sd, stack, node.y, node.z, node.w);
+      break;
+      SVM_CASE(NODE_MIX_FLOAT)
+      svm_node_mix_float(sd, stack, node.y, node.z, node.w);
+      break;
+      SVM_CASE(NODE_MIX_VECTOR)
+      svm_node_mix_vector(sd, stack, node.y, node.z);
+      break;
+      SVM_CASE(NODE_MIX_VECTOR_NON_UNIFORM)
+      svm_node_mix_vector_non_uniform(sd, stack, node.y, node.z);
+      break;
       default:
         kernel_assert(!"Unknown node type was passed to the SVM machine");
         return;
diff --git a/intern/cycles/kernel/svm/types.h b/intern/cycles/kernel/svm/types.h
index 98dfe6a4375..9dd8f196e0f 100644
--- a/intern/cycles/kernel/svm/types.h
+++ b/intern/cycles/kernel/svm/types.h
@@ -133,7 +133,7 @@ typedef enum NodeMix {
   NODE_MIX_HUE,
   NODE_MIX_SAT,
   NODE_MIX_VAL,
-  NODE_MIX_COLOR,
+  NODE_MIX_COL,
   NODE_MIX_SOFT,
   NODE_MIX_LINEAR,
   NODE_MIX_CLAMP /* used for the clamp UI option */
diff --git a/intern/cycles/scene/constant_fold.cpp b/intern/cycles/scene/constant_fold.cpp
index 4bce5661f9b..1aa4515a087 100644
--- a/intern/cycles/scene/constant_fold.cpp
+++ b/intern/cycles/scene/constant_fold.cpp
@@ -291,6 +291,101 @@ void ConstantFolder::fold_mix(NodeMix type, bool clamp) const
   }
 }
 
+void ConstantFolder::fold_mix_color(NodeMix type, bool clamp_factor, bool clamp) const
+{
+  ShaderInput *fac_in = node->input("Factor");
+  ShaderInput *color1_in = node->input("A");
+  ShaderInput *color2_in = node->input("B");
+
+  float fac = clamp_factor ? saturatef(node->get_float(fac_in->socket_type)) :
+                             node->get_float(fac_in->socket_type);
+  bool fac_is_zero = !fac_in->link && fac == 0.0f;
+  bool fac_is_one = !fac_in->link && fac == 1.0f;
+
+  /* remove no-op node when factor is 0.0 */
+  if (fac_is_zero) {
+    /* note that some of the modes will clamp out of bounds values even without use_clamp */
+    if (!(type == NODE_MIX_LIGHT || type == NODE_MIX_DODGE || type == NODE_MIX_BURN)) {
+      if (try_bypass_or_make_constant(color1_in, clamp)) {
+        return;
+      }
+    }
+  }
+
+  switch (type) {
+    case NODE_MIX_BLEND:
+      /* remove useless mix colors nodes */
+      if (color1_in->link && color2_in->link) {
+        if (color1_in->link == color2_in->link) {
+          try_bypass_or_make_constant(color1_in, clamp);
+          break;
+        }
+      }
+      else if (!color1_in->link && !color2_in->link) {
+        float3 color1 = node->get_float3(color1_in->socket_type);
+        float3 color2 = node->get_float3(color2_in->socket_type);
+        if (color1 == color2) {
+          try_bypass_or_make_constant(color1_in, clamp);
+          break;
+        }
+      }
+      /* remove no-op mix color node when factor is 1.0 */
+      if (fac_is_one) {
+        try_bypass_or_make_constant(color2_in, clamp);
+        break;
+      }
+      break;
+    case NODE_MIX_ADD:
+      /* 0 + X (fac 1) == X */
+      if (is_zero(color1_in) && fac_is_one) {
+        try_bypass_or_make_constant(color2_in, clamp);
+      }
+      /* X + 0 (fac ?) == X */
+      else if (is_zero(color2_in)) {
+        try_bypass_or_make_constant(color1_in, clamp);
+      }
+      break;
+    case NODE_MIX_SUB:
+      /* X - 0 (fac ?) == X */
+      if (is_zero(color2_in)) {
+        try_bypass_or_make_constant(color1_in, clamp);
+      }
+      /* X - X (fac 1) == 0 */
+      else if (color1_in->link && color1_in->link == color2_in->link && fac_is_one) {
+        make_zero();
+      }
+      break;
+    case NODE_MIX_MUL:
+      /* X * 1 (fac ?) == X, 1 * X (fac 1) == X */
+      if (is_one(color1_in) && fac_is_one) {
+        try_bypass_or_make_constant(color2_in, clamp);
+      }
+      else if (is_one(color2_in)) {
+        try_bypass_or_make_constant(color1_in, clamp);
+      }
+      /* 0 * ? (fac ?) == 0, ? * 0 (fac 1) == 0 */
+      else if (is_zero(color1_in)) {
+        make_zero();
+      }
+      else if (is_zero(color2_in) && fac_is_one) {
+        make_zero();
+      }
+      break;
+    case NODE_MIX_DIV:
+      /* X / 1 (fac ?) == X */
+      if (is_one(color2_in)) {
+        try_bypass_or_make_constant(color1_in, clamp);
+      }
+      /* 0 / ? (fac ?) == 0 */
+      else if (is_zero(color1_in)) {
+        make_zero();
+      }
+      break;
+    default:
+      break;
+  }
+}
+
 void ConstantFolder::fold_math(NodeMathType type) const
 {
   ShaderInput *value1_in = node->input("Value1");
diff --git a/intern/cycles/scene/constant_fold.h b/intern/cycles/scene/constant_fold.h
index 090ce367e6c..246ff2d31ee 100644
--- a/intern/cycles/scene/constant_fold.h
+++ b/intern/cycles/scene/constant_fold.h
@@ -51,6 +51,7 @@ class ConstantFolder {
 
   /* Specific nodes. */
   void fold_mix(NodeMix type, bool clamp) const;
+  void fold_mix_color(NodeMix type, bool clamp_factor, bool clamp) const;
   void fold_math(NodeMathType type) const;
   void fold_vector_math(NodeVectorMathType type) const;
   void fold_mapping(NodeMappingType type) const;
diff --git a/intern/cycles/scene/shader_nodes.cpp b/intern/cycles/scene/shader_nodes.cpp
index bedb0fe2902..a9cd453947b 100644
--- a/intern/cycles/scene/shader_nodes.cpp
+++ b/intern/cycles/scene/shader_nodes.cpp
@@ -4950,7 +4950,7 @@ NODE_DEFINE(MixNode)
   type_enum.insert("hue", NODE_MIX_HUE);
   type_enum.insert("saturation", NODE_MIX_SAT);
   type_enum.insert("value", NODE_MIX_VAL);
-  type_enum.insert("color", NODE_MIX_COLOR);
+  type_enum.insert("color", NODE_MIX_COL);
   type_enum.insert("soft_light", NODE_MIX_SOFT);
   type_enum.insert("linear_light", NODE_MIX_LINEAR);
   SOCKET_ENUM(mix_type, "Type", type_enum, NODE_MIX_BLEND);
@@ -4999,13 +4999,253 @@ void MixNode::compile(OSLCompiler &compiler)
 void MixNode::constant_fold(const ConstantFolder &folder)
 {
   if (folder.all_inputs_constant()) {
-    folder.make_constant_clamp(svm_mix(mix_type, fac, color1, color2), use_clamp);
+    folder.make_constant_clamp(svm_mix_clamped_factor(mix_type, fac, color1, color2), use_clamp);
   }
   else {
     folder.fold_mix(mix_type, use_clamp);
   }
 }
 
+/* Mix Color */
+
+NODE_DEFINE(MixColorNode)
+{
+  NodeType *type = NodeType::add("mix_color", create, NodeType::SHADER);
+
+  static NodeEnum type_enum;
+  type_enum.insert("mix", NODE_MIX_BLEND);
+  type_enum.insert("add", NODE_MIX_ADD);
+  type_enum.insert("multiply", NODE_MIX_MUL);
+  type_enum.insert("screen", NODE_MIX_SCREEN);
+  type_enum.insert("overlay", NODE_MIX_OVERLAY);
+  type_enum.insert("subtract", NODE_MIX_SUB);
+  type_enum.insert("divide", NODE_MIX_DIV);
+  type_enum.insert("difference", NODE_MIX_DIFF);
+  type_enum.insert("darken", NODE_MIX_DARK);
+  type_enum.insert("lighten", NODE_MIX_LIGHT);
+  type_enum.insert("dodge", NODE_MIX_DODGE);
+  type_enum.insert("burn", NODE_MIX_BURN);
+  type_enum.insert("hue", NODE_MIX_HUE);
+  type_enum.insert("saturation", NODE_MIX_SAT);
+  type_enum.insert("value", NODE_MIX_VAL);
+  type_enum.insert("color", NODE_MIX_COL);
+  type_enum.insert("soft_light", NODE_MIX_SOFT);
+  type_enum.insert("linear_light", NODE_MIX_LINEAR);
+  SOCKET_ENUM(blend_type, "Type", type_enum, NODE_MIX_BLEND);
+
+  SOCKET_IN_FLOAT(fac, "Factor", 0.5f);
+  SOCKET_IN_COLOR(a, "A", zero_float3());
+  SOCKET_IN_COLOR(b, "B", zero_float3());
+  SOCKET_BOOLEAN(use_clamp_result, "Use Clamp Result", false);
+  SOCKET_BOOLEAN(use_clamp, "Use Clamp", true);
+
+  SOCKET_OUT_COLOR(result, "Result");
+
+  return type;
+}
+
+MixColorNode::MixColorNode() : ShaderNode(get_node_type())
+{
+}
+
+void MixColorNode::compile(SVMCompiler &compiler)
+{
+  ShaderInput *fac_in = input("Factor");
+  ShaderInput *a_in = input("A");
+  ShaderInput *b_in = input("B");
+  ShaderOutput *result_out = output("Result");
+
+  int fac_in_stack_offset = compiler.stack_assign(fac_in);
+  int a_in_stack_offset = compiler.stack_assign(a_in);
+  int b_in_stack_offset = compiler.stack_assign(b_in);
+
+  compiler.add_node(
+      NODE_MIX_COLOR,
+      compiler.encode_uchar4(use_clamp, blend_type, use_clamp_result),
+      compiler.encode_uchar4(fac_in_stack_offset, a_in_stack_offset, b_in_stack_offset),
+      compiler.stack_assign(result_out));
+}
+
+void MixColorNode::compile(OSLCompiler &compiler)
+{
+  compiler.parameter(this, "blend_type");
+  compiler.parameter(this, "use_clamp");
+  compiler.parameter(this, "use_clamp_result");
+  compiler.add(this, "node_mix_color");
+}
+
+void MixColorNode::constant_fold(const ConstantFolder &folder)
+{
+  if (folder.all_inputs_constant()) {
+    if (use_clamp) {
+      fac = clamp(fac, 0.0f, 1.0f);
+    }
+    folder.make_constant_clamp(svm_mix(blend_type, fac, a, b), use_clamp_result);
+  }
+  else {
+    folder.fold_mix_color(blend_type, use_clamp, use_clamp_result);
+  }
+}
+
+/* Mix Float */
+
+NODE_DEFINE(MixFloatNode)
+{
+  NodeType *type = NodeType::add("mix_float", create, NodeType::SHADER);
+
+  SOCKET_IN_FLOAT(fac, "Factor", 0.5f);
+  SOCKET_IN_FLOAT(a, "A", 0.0f);
+  SOCKET_IN_FLOAT(b, "B", 0.0f);
+  SOCKET_BOOLEAN(use_clamp, "Use Clamp", true);
+  SOCKET_OUT_FLOAT(result, "Result");
+
+  return type;
+}
+
+MixFloatNode::MixFloatNode() : ShaderNode(get_node_type())
+{
+}
+
+void MixFloatNode::compile(SVMCompiler &compiler)
+{
+  ShaderInput *fac_in = input("Factor");
+  ShaderInput *a_in = input("A");
+  ShaderInput *b_in = input("B");
+  ShaderOutput *result_out = output("Result");
+
+  int fac_in_stack_offset = compiler.stack_assign(fac_in);
+  int a_in_stack_offset = compiler.stack_assign(a_in);
+  int b_in_stack_offset = compiler.stack_assign(b_in);
+
+  compiler.add_node(
+      NODE_MIX_FLOAT,
+      use_clamp,
+      compiler.encode_uchar4(fac_in_stack_offset, a_in_stack_offset, b_in_stack_offset),
+      compiler.stack_assign(result_out));
+}
+
+void MixFloatNode::compile(OSLCompiler &compiler)
+{
+  compiler.parameter(this, "use_clamp");
+  compiler.add(this, "node_mix_float");
+}
+
+void MixFloatNode::constant_fold(const ConstantFolder &folder)
+{
+  if (folder.all_inputs_constant()) {
+    if (use_clamp) {
+      fac = clamp(fac, 0.0f, 1.0f);
+    }
+    folder.make_constant(a * (1 - fac) + b * fac);
+  }
+}
+
+/* Mix Vector */
+
+NODE_DEFINE(MixVectorNode)
+{
+  NodeType *type = NodeType::add("mix_vector", create, NodeType::SHADER);
+
+  SOCKET_IN_FLOAT(fac, "Factor", 0.5f);
+  SOCKET_IN_VECTOR(a, "A", zero_float3());
+  SOCKET_IN_VECTOR(b, "B", zero_float3());
+  SOCKET_BOOLEAN(use_clamp, "Use Clamp", true);
+
+  SOCKET_OUT_VECTOR(result, "Result");
+
+  return type;
+}
+
+MixVectorNode::MixVectorNode() : ShaderNode(get_node_type())
+{
+}
+
+void MixVectorNode::compile(SVMCompiler &compiler)
+{
+  ShaderInput *fac_in = input("Factor");
+  ShaderInput *a_in = input("A");
+  ShaderInput *b_in = input("B");
+  ShaderOutput *result_out = output("Result");
+
+  int fac_in_stack_offset = compiler.stack_assign(fac_in);
+  int a_in_stack_offset = compiler.stack_assign(a_in);
+  int b_in_stack_offset = compiler.stack_assign(b_in);
+
+  compiler.add_node(
+      NODE_MIX_VECTOR,
+      compiler.encode_uchar4(use_clamp, fac_in_stack_offset, a_in_stack_offset, b_in_stack_offset),
+      compiler.stack_assign(result_out));
+}
+
+void MixVectorNode::compile(OSLCompiler &compiler)
+{
+  compiler.parameter(this, "use_clamp");
+  compiler.add(this, "node_mix_vector");
+}
+
+void MixVectorNode::constant_fold(const ConstantFolder &folder)
+{
+  if (folder.all_inputs_constant()) {
+    if (use_clamp) {
+      fac = clamp(fac, 0.0f, 1.0f);
+    }
+    folder.make_constant(a * (one_float3() - fac) + b * fac);
+  }
+}
+
+/* Mix Vector Non Uniform */
+
+NODE_DEFINE(MixVectorNonUniformNode)
+{
+  NodeType *type = NodeType::add("mix_vector_non_uniform", create, NodeType::SHADER);
+
+  SOCKET_IN_VECTOR(fac, "Factor", make_float3(0.5f, 0.5f, 0.5f));
+  SOCKET_IN_VECTOR(a, "A", zero_float3());
+  SOCKET_IN_VECTOR(b, "B", zero_float3());
+  SOCKET_BOOLEAN(use_clamp, "Use Clamp", true);
+
+  SOCKET_OUT_VECTOR(result, "Result");
+
+  return type;
+}
+
+MixVectorNonUniformNode::MixVectorNonUniformNode() : ShaderNode(get_node_type())
+{
+}
+
+void MixVectorNonUniformNode::compile(SVMCompiler &compiler)
+{
+  ShaderInput *fac_in = input("Factor");
+  ShaderInput *a_in = input("A");
+  ShaderInput *b_in = input("B");
+  ShaderOutput *result_out = output("Result");
+
+  int fac_in_stack_offset = compiler.stack_assign(fac_in);
+  int a_in_stack_offset = compiler.stack_assign(a_in);
+  int b_in_stack_offset = compiler.stack_assign(b_in);
+
+  compiler.add_node(
+      NODE_MIX_VECTOR_NON_UNIFORM,
+      compiler.encode_uchar4(use_clamp, fac_in_stack_offset, a_in_stack_offset, b_in_stack_offset),
+      compiler.stack_assign(result_out));
+}
+
+void MixVectorNonUniformNode::compile(OSLCompiler &compiler)
+{
+  compiler.parameter(this, "use_clamp");
+  compiler.add(this, "node_mix_vector_non_uniform");
+}
+
+void MixVectorNonUniformNode::constant_fold(const ConstantFolder &folder)
+{
+  if (folder.all_inputs_constant()) {
+    if (use_clamp) {
+      fac = saturate(fac);
+    }
+    folder.make_constant(a * (one_float3() - fac) + b * fac);
+  }
+}
+
 /* Combine Color */
 
 NODE_DEFINE(CombineColorNode)
diff --git a/intern/cycles/scene/shader_nodes.h b/intern/cycles/scene/shader_nodes.h
index ac40a397c1e..cc3a71a0697 100644
--- a/intern/cycles/scene/shader_nodes.h
+++ b/intern/cycles/scene/shader_nodes.h
@@ -1101,6 +1101,52 @@ class MixNode : public ShaderNode {
   NODE_SOCKET_API(float, fac)
 };
 
+class MixColorNode : public ShaderNode {
+ public:
+  SHADER_NODE_CLASS(MixColorNode)
+  void constant_fold(const ConstantFolder &folder);
+
+  NODE_SOCKET_API(float3, a)
+  NODE_SOCKET_API(float3, b)
+  NODE_SOCKET_API(float, fac)
+  NODE_SOCKET_API(bool, use_clamp)
+  NODE_SOCKET_API(bool, use_clamp_result)
+  NODE_SOCKET_API(NodeMix, blend_type)
+};
+
+class MixFloatNode : public ShaderNode {
+ public:
+  SHADER_NODE_CLASS(MixFloatNode)
+  void constant_fold(const ConstantFolder &folder);
+
+  NODE_SOCKET_API(float, a)
+  NODE_SOCKET_API(float, b)
+  NODE_SOCKET_API(float, fac)
+  NODE_SOCKET_API(bool, use_clamp)
+};
+
+class MixVectorNode : public ShaderNode {
+ public:
+  SHADER_NODE_CLASS(MixVectorNode)
+  void constant_fold(const ConstantFolder &folder);
+
+  NODE_SOCKET_API(float3, a)
+  NODE_SOCKET_API(float3, b)
+  NODE_SOCKET_API(float, fac)
+  NODE_SOCKET_API(bool, use_clamp)
+};
+
+class MixVectorNonUniformNode : public ShaderNode {
+ public:
+  SHADER_NODE_CLASS(MixVectorNonUniformNode)
+  void constant_fold(const ConstantFolder &folder);
+
+  NODE_SOCKET_API(float3, a)
+  NODE_SOCKET_API(float3, b)
+  NODE_SOCKET_API(float3, fac)
+  NODE_SOCKET_API(bool, use_clamp)
+};
+
 class CombineColorNode : public ShaderNode {
  public:
   SHADER_NODE_CLASS(CombineColorNode)
diff --git a/intern/ghost/GHOST_ISystem.h b/intern/ghost/GHOST_ISystem.h
index 0dd855bb513..aa893a66a9d 100644
--- a/intern/ghost/GHOST_ISystem.h
+++ b/intern/ghost/GHOST_ISystem.h
@@ -437,9 +437,9 @@ class GHOST_ISystem {
   /**
    * Set the Console State
    * \param action: console state
-   * \return current status (1 -visible, 0 - hidden)
+   * \return current status (true: visible, 0: hidden)
    */
-  virtual int setConsoleWindowState(GHOST_TConsoleWindowState action) = 0;
+  virtual bool setConsoleWindowState(GHOST_TConsoleWindowState action) = 0;
 
   /***************************************************************************************
    * Access to clipboard.
diff --git a/intern/ghost/intern/GHOST_C-api.cpp b/intern/ghost/intern/GHOST_C-api.cpp
index 62e1e470010..710512881e8 100644
--- a/intern/ghost/intern/GHOST_C-api.cpp
+++ b/intern/ghost/intern/GHOST_C-api.cpp
@@ -869,8 +869,7 @@ void GHOST_putClipboard(const char *buffer, bool selection)
 bool GHOST_setConsoleWindowState(GHOST_TConsoleWindowState action)
 {
   GHOST_ISystem *system = GHOST_ISystem::getSystem();
-  /* FIXME: use `bool` instead of int for this value. */
-  return (bool)system->setConsoleWindowState(action);
+  return system->setConsoleWindowState(action);
 }
 
 bool GHOST_UseNativePixels(void)
diff --git a/intern/ghost/intern/GHOST_ContextD3D.cpp b/intern/ghost/intern/GHOST_ContextD3D.cpp
index 4fc05cf912c..857323941ea 100644
--- a/intern/ghost/intern/GHOST_ContextD3D.cpp
+++ b/intern/ghost/intern/GHOST_ContextD3D.cpp
@@ -123,8 +123,6 @@ class GHOST_SharedOpenGLResource {
                              ID3D11RenderTargetView *render_target = nullptr)
       : m_device(device), m_device_ctx(device_ctx), m_cur_width(width), m_cur_height(height)
   {
-    ID3D11Resource *backbuffer_res;
-
     if (!render_target) {
       D3D11_TEXTURE2D_DESC texDesc{};
       D3D11_RENDER_TARGET_VIEW_DESC renderTargetViewDesc{};
@@ -157,11 +155,12 @@ class GHOST_SharedOpenGLResource {
 
     m_render_target = render_target;
     if (m_render_target) {
+      ID3D11Resource *backbuffer_res = nullptr;
       m_render_target->GetResource(&backbuffer_res);
-    }
-    if (backbuffer_res) {
-      backbuffer_res->QueryInterface<ID3D11Texture2D>(&m_render_target_tex);
-      backbuffer_res->Release();
+      if (backbuffer_res) {
+        backbuffer_res->QueryInterface<ID3D11Texture2D>(&m_render_target_tex);
+        backbuffer_res->Release();
+      }
     }
 
     if (!m_render_target || !m_render_target_tex) {
diff --git a/intern/ghost/intern/GHOST_DropTargetWin32.cpp b/intern/ghost/intern/GHOST_DropTargetWin32.cpp
index 2283cff3827..03d55c848e3 100644
--- a/intern/ghost/intern/GHOST_DropTargetWin32.cpp
+++ b/intern/ghost/intern/GHOST_DropTargetWin32.cpp
@@ -219,35 +219,30 @@ void *GHOST_DropTargetWin32::getDropDataAsFilenames(IDataObject *pDataObject)
       hdrop = (HDROP)::GlobalLock(stgmed.hGlobal);
 
       totfiles = ::DragQueryFileW(hdrop, -1, NULL, 0);
-      if (!totfiles) {
-        ::GlobalUnlock(stgmed.hGlobal);
-        return NULL;
-      }
-
-      strArray = (GHOST_TStringArray *)::malloc(sizeof(GHOST_TStringArray));
-      strArray->count = 0;
-      strArray->strings = (uint8_t **)::malloc(totfiles * sizeof(uint8_t *));
-
-      for (UINT nfile = 0; nfile < totfiles; nfile++) {
-        if (::DragQueryFileW(hdrop, nfile, fpath, MAX_PATH) > 0) {
-          if (!(temp_path = alloc_utf_8_from_16(fpath, 0))) {
-            continue;
+      if (totfiles) {
+        strArray = (GHOST_TStringArray *)::malloc(sizeof(GHOST_TStringArray));
+        strArray->count = 0;
+        strArray->strings = (uint8_t **)::malloc(totfiles * sizeof(uint8_t *));
+
+        for (UINT nfile = 0; nfile < totfiles; nfile++) {
+          if (::DragQueryFileW(hdrop, nfile, fpath, MAX_PATH) > 0) {
+            if (!(temp_path = alloc_utf_8_from_16(fpath, 0))) {
+              continue;
+            }
+            /* Just ignore paths that could not be converted verbatim. */
+
+            strArray->strings[nvalid] = (uint8_t *)temp_path;
+            strArray->count = nvalid + 1;
+            nvalid++;
           }
-          /* Just ignore paths that could not be converted verbatim. */
-
-          strArray->strings[nvalid] = (uint8_t *)temp_path;
-          strArray->count = nvalid + 1;
-          nvalid++;
         }
       }
       /* Free up memory. */
       ::GlobalUnlock(stgmed.hGlobal);
       ::ReleaseStgMedium(&stgmed);
-
-      return strArray;
     }
   }
-  return NULL;
+  return strArray;
 }
 
 void *GHOST_DropTargetWin32::getDropDataAsString(IDataObject *pDataObject)
@@ -261,16 +256,18 @@ void *GHOST_DropTargetWin32::getDropDataAsString(IDataObject *pDataObject)
   if (pDataObject->QueryGetData(&fmtetc) == S_OK) {
     if (pDataObject->GetData(&fmtetc, &stgmed) == S_OK) {
       LPCWSTR wstr = (LPCWSTR)::GlobalLock(stgmed.hGlobal);
-      if (!(tmp_string = alloc_utf_8_from_16((wchar_t *)wstr, 0))) {
-        ::GlobalUnlock(stgmed.hGlobal);
-        return NULL;
-      }
+
+      tmp_string = alloc_utf_8_from_16((wchar_t *)wstr, 0);
+
       /* Free memory. */
       ::GlobalUnlock(stgmed.hGlobal);
       ::ReleaseStgMedium(&stgmed);
+
 #ifdef WITH_GHOST_DEBUG
-      ::printf("\n<converted droped unicode string>\n%s\n</droped converted unicode string>\n",
-               tmp_string);
+      if (tmp_string) {
+        ::printf("\n<converted droped unicode string>\n%s\n</droped converted unicode string>\n",
+                 tmp_string);
+      }
 #endif /* WITH_GHOST_DEBUG */
       return tmp_string;
     }
@@ -283,15 +280,8 @@ void *GHOST_DropTargetWin32::getDropDataAsString(IDataObject *pDataObject)
       char *str = (char *)::GlobalLock(stgmed.hGlobal);
 
       tmp_string = (char *)::malloc(::strlen(str) + 1);
-      if (!tmp_string) {
-        ::GlobalUnlock(stgmed.hGlobal);
-        return NULL;
-      }
-
-      if (!::strcpy(tmp_string, str)) {
-        ::free(tmp_string);
-        ::GlobalUnlock(stgmed.hGlobal);
-        return NULL;
+      if (tmp_string) {
+        ::strcpy(tmp_string, str);
       }
       /* Free memory. */
       ::GlobalUnlock(stgmed.hGlobal);
diff --git a/intern/ghost/intern/GHOST_SystemCocoa.h b/intern/ghost/intern/GHOST_SystemCocoa.h
index 8b6dfb4efed..a9e659d3565 100644
--- a/intern/ghost/intern/GHOST_SystemCocoa.h
+++ b/intern/ghost/intern/GHOST_SystemCocoa.h
@@ -236,9 +236,9 @@ class GHOST_SystemCocoa : public GHOST_System {
   /**
    * \see GHOST_ISystem
    */
-  int setConsoleWindowState(GHOST_TConsoleWindowState action)
+  bool setConsoleWindowState(GHOST_TConsoleWindowState action)
   {
-    return 0;
+    return false;
   }
 
   /**
diff --git a/intern/ghost/intern/GHOST_SystemHeadless.h b/intern/ghost/intern/GHOST_SystemHeadless.h
index dcf445420a4..b02a82fc9eb 100644
--- a/intern/ghost/intern/GHOST_SystemHeadless.h
+++ b/intern/ghost/intern/GHOST_SystemHeadless.h
@@ -30,7 +30,7 @@ class GHOST_SystemHeadless : public GHOST_System {
   {
     return false;
   }
-  int setConsoleWindowState(GHOST_TConsoleWindowState /*action*/) override
+  bool setConsoleWindowState(GHOST_TConsoleWindowState /*action*/) override
   {
     return 0;
   }
diff --git a/intern/ghost/intern/GHOST_SystemSDL.h b/intern/ghost/intern/GHOST_SystemSDL.h
index aefea5eda34..bee277ba674 100644
--- a/intern/ghost/intern/GHOST_SystemSDL.h
+++ b/intern/ghost/intern/GHOST_SystemSDL.h
@@ -33,9 +33,9 @@ class GHOST_SystemSDL : public GHOST_System {
 
   bool processEvents(bool waitForEvent);
 
-  int setConsoleWindowState(GHOST_TConsoleWindowState /*action*/)
+  bool setConsoleWindowState(GHOST_TConsoleWindowState /*action*/)
   {
-    return 0;
+    return false;
   }
 
   GHOST_TSuccess getModifierKeys(GHOST_ModifierKeys &keys) const;
diff --git a/intern/ghost/intern/GHOST_SystemWayland.cpp b/intern/ghost/intern/GHOST_SystemWayland.cpp
index 13357a3d31a..c2859edc56b 100644
--- a/intern/ghost/intern/GHOST_SystemWayland.cpp
+++ b/intern/ghost/intern/GHOST_SystemWayland.cpp
@@ -3035,9 +3035,9 @@ bool GHOST_SystemWayland::processEvents(bool waitForEvent)
   return any_processed;
 }
 
-int GHOST_SystemWayland::setConsoleWindowState(GHOST_TConsoleWindowState /*action*/)
+bool GHOST_SystemWayland::setConsoleWindowState(GHOST_TConsoleWindowState /*action*/)
 {
-  return 0;
+  return false;
 }
 
 GHOST_TSuccess GHOST_SystemWayland::getModifierKeys(GHOST_ModifierKeys &keys) const
diff --git a/intern/ghost/intern/GHOST_SystemWayland.h b/intern/ghost/intern/GHOST_SystemWayland.h
index 632f4bf28d8..f3b42de5a1b 100644
--- a/intern/ghost/intern/GHOST_SystemWayland.h
+++ b/intern/ghost/intern/GHOST_SystemWayland.h
@@ -97,7 +97,7 @@ class GHOST_SystemWayland : public GHOST_System {
 
   bool processEvents(bool waitForEvent) override;
 
-  int setConsoleWindowState(GHOST_TConsoleWindowState action) override;
+  bool setConsoleWindowState(GHOST_TConsoleWindowState action) override;
 
   GHOST_TSuccess getModifierKeys(GHOST_ModifierKeys &keys) const override;
 
diff --git a/intern/ghost/intern/GHOST_SystemWin32.cpp b/intern/ghost/intern/GHOST_SystemWin32.cpp
index 5ea369c50bf..b583d39dd1f 100644
--- a/intern/ghost/intern/GHOST_SystemWin32.cpp
+++ b/intern/ghost/intern/GHOST_SystemWin32.cpp
@@ -131,7 +131,7 @@ GHOST_SystemWin32::GHOST_SystemWin32()
   GHOST_ASSERT(m_displayManager, "GHOST_SystemWin32::GHOST_SystemWin32(): m_displayManager==0\n");
   m_displayManager->initialize();
 
-  m_consoleStatus = 1;
+  m_consoleStatus = true;
 
   /* Tell Windows we are per monitor DPI aware. This disables the default
    * blurry scaling and enables WM_DPICHANGED to allow us to draw at proper DPI. */
@@ -353,6 +353,7 @@ GHOST_ContextD3D *GHOST_SystemWin32::createOffscreenContextD3D()
   context = new GHOST_ContextD3D(false, wnd);
   if (context->initializeDrawingContext() == GHOST_kFailure) {
     delete context;
+    context = nullptr;
   }
 
   return context;
@@ -900,11 +901,11 @@ void GHOST_SystemWin32::processWintabEvent(GHOST_WindowWin32 *window)
               new GHOST_EventButton(info.time, info.type, window, info.button, info.tabletData));
 
           mouseMoveHandled = true;
-          break;
         }
         else {
           WINTAB_PRINTF(" ... but no system button\n");
         }
+        break;
       }
       case GHOST_kEventButtonUp: {
         WINTAB_PRINTF("HWND %p Wintab button up", window->getHWND());
@@ -1156,10 +1157,10 @@ GHOST_EventKey *GHOST_SystemWin32::processKeyEvent(GHOST_WindowWin32 *window, RA
    * those events here as well. */
   if (!is_repeated_modifier) {
     char utf8_char[6] = {0};
-    BYTE state[256] = {0};
-    GetKeyboardState((PBYTE)state);
-    bool ctrl_pressed = state[VK_CONTROL] & 0x80;
-    bool alt_pressed = state[VK_MENU] & 0x80;
+    BYTE state[256];
+    const BOOL has_state = GetKeyboardState((PBYTE)state);
+    const bool ctrl_pressed = has_state && state[VK_CONTROL] & 0x80;
+    const bool alt_pressed = has_state && state[VK_MENU] & 0x80;
 
     if (!key_down) {
       /* Pass. */
@@ -2123,8 +2124,6 @@ LRESULT WINAPI GHOST_SystemWin32::s_wndProc(HWND hwnd, UINT msg, WPARAM wParam,
 
 char *GHOST_SystemWin32::getClipboard(bool selection) const
 {
-  char *temp_buff;
-
   if (IsClipboardFormatAvailable(CF_UNICODETEXT) && OpenClipboard(NULL)) {
     wchar_t *buffer;
     HANDLE hData = GetClipboardData(CF_UNICODETEXT);
@@ -2138,7 +2137,7 @@ char *GHOST_SystemWin32::getClipboard(bool selection) const
       return NULL;
     }
 
-    temp_buff = alloc_utf_8_from_16(buffer, 0);
+    char *temp_buff = alloc_utf_8_from_16(buffer, 0);
 
     /* Buffer mustn't be accessed after CloseClipboard
      * it would like accessing free-d memory */
@@ -2147,7 +2146,7 @@ char *GHOST_SystemWin32::getClipboard(bool selection) const
 
     return temp_buff;
   }
-  else if (IsClipboardFormatAvailable(CF_TEXT) && OpenClipboard(NULL)) {
+  if (IsClipboardFormatAvailable(CF_TEXT) && OpenClipboard(NULL)) {
     char *buffer;
     size_t len = 0;
     HANDLE hData = GetClipboardData(CF_TEXT);
@@ -2162,7 +2161,7 @@ char *GHOST_SystemWin32::getClipboard(bool selection) const
     }
 
     len = strlen(buffer);
-    temp_buff = (char *)malloc(len + 1);
+    char *temp_buff = (char *)malloc(len + 1);
     strncpy(temp_buff, buffer, len);
     temp_buff[len] = '\0';
 
@@ -2173,9 +2172,7 @@ char *GHOST_SystemWin32::getClipboard(bool selection) const
 
     return temp_buff;
   }
-  else {
-    return NULL;
-  }
+  return nullptr;
 }
 
 void GHOST_SystemWin32::putClipboard(const char *buffer, bool selection) const
@@ -2320,7 +2317,7 @@ static bool isStartedFromCommandPrompt()
   return false;
 }
 
-int GHOST_SystemWin32::setConsoleWindowState(GHOST_TConsoleWindowState action)
+bool GHOST_SystemWin32::setConsoleWindowState(GHOST_TConsoleWindowState action)
 {
   HWND wnd = GetConsoleWindow();
 
@@ -2328,13 +2325,13 @@ int GHOST_SystemWin32::setConsoleWindowState(GHOST_TConsoleWindowState action)
     case GHOST_kConsoleWindowStateHideForNonConsoleLaunch: {
       if (!isStartedFromCommandPrompt()) {
         ShowWindow(wnd, SW_HIDE);
-        m_consoleStatus = 0;
+        m_consoleStatus = false;
       }
       break;
     }
     case GHOST_kConsoleWindowStateHide: {
       ShowWindow(wnd, SW_HIDE);
-      m_consoleStatus = 0;
+      m_consoleStatus = false;
       break;
     }
     case GHOST_kConsoleWindowStateShow: {
@@ -2342,7 +2339,7 @@ int GHOST_SystemWin32::setConsoleWindowState(GHOST_TConsoleWindowState action)
       if (!isStartedFromCommandPrompt()) {
         DeleteMenu(GetSystemMenu(wnd, FALSE), SC_CLOSE, MF_BYCOMMAND);
       }
-      m_consoleStatus = 1;
+      m_consoleStatus = true;
       break;
     }
     case GHOST_kConsoleWindowStateToggle: {
diff --git a/intern/ghost/intern/GHOST_SystemWin32.h b/intern/ghost/intern/GHOST_SystemWin32.h
index 93b56a128c0..81c565ae732 100644
--- a/intern/ghost/intern/GHOST_SystemWin32.h
+++ b/intern/ghost/intern/GHOST_SystemWin32.h
@@ -430,7 +430,7 @@ class GHOST_SystemWin32 : public GHOST_System {
    * \param action: console state
    * \return current status (1 -visible, 0 - hidden)
    */
-  int setConsoleWindowState(GHOST_TConsoleWindowState action);
+  bool setConsoleWindowState(GHOST_TConsoleWindowState action);
 
   /** The virtual-key code (VKey) of the last press event. Used to detect repeat events. */
   unsigned short m_keycode_last_repeat_key;
@@ -450,7 +450,7 @@ class GHOST_SystemWin32 : public GHOST_System {
   HKL m_keylayout;
 
   /** Console status. */
-  int m_consoleStatus;
+  bool m_consoleStatus;
 
   /** Wheel delta accumulator. */
   int m_wheelDeltaAccum;
diff --git a/intern/ghost/intern/GHOST_SystemX11.h b/intern/ghost/intern/GHOST_SystemX11.h
index 7938aa2b646..bd6ace101e9 100644
--- a/intern/ghost/intern/GHOST_SystemX11.h
+++ b/intern/ghost/intern/GHOST_SystemX11.h
@@ -253,7 +253,7 @@ class GHOST_SystemX11 : public GHOST_System {
   /**
    * \see GHOST_ISystem
    */
-  int setConsoleWindowState(GHOST_TConsoleWindowState /*action*/)
+  bool setConsoleWindowState(GHOST_TConsoleWindowState /*action*/)
   {
     return 0;
   }
diff --git a/intern/ghost/intern/GHOST_WindowWin32.cpp b/intern/ghost/intern/GHOST_WindowWin32.cpp
index 4d8e0d492d9..50ee9385e39 100644
--- a/intern/ghost/intern/GHOST_WindowWin32.cpp
+++ b/intern/ghost/intern/GHOST_WindowWin32.cpp
@@ -624,11 +624,9 @@ GHOST_Context *GHOST_WindowWin32::newDrawingContext(GHOST_TDrawingContextType ty
     GHOST_Context *context;
 
     context = new GHOST_ContextD3D(false, m_hWnd);
-    if (context->initializeDrawingContext()) {
-      return context;
-    }
-    else {
+    if (!context->initializeDrawingContext()) {
       delete context;
+      context = nullptr;
     }
 
     return context;
diff --git a/release/datafiles/locale b/release/datafiles/locale
-Subproject a2eb507891449a0b67582be9561840075513661
+Subproject 1b891478f44dd047c3a92fda3ebd17fae1c3acd
diff --git a/release/freedesktop/org.blender.Blender.appdata.xml b/release/freedesktop/org.blender.Blender.appdata.xml
index 12291860050..0f1aa5099b6 100644
--- a/release/freedesktop/org.blender.Blender.appdata.xml
+++ b/release/freedesktop/org.blender.Blender.appdata.xml
@@ -40,6 +40,47 @@
         </screenshot>
     </screenshots>
     <releases>
+        <release version="3.3" date="2022-09-07">
+            <description>
+                <p>New features:</p>
+                <ul>
+                    <li>New hair system</li>
+                    <li>Cycles Rendering on Intel Arc GPUs</li>
+                    <li>Grease Pencil Light and Shadow calculations</li>
+                    <li>Motion Tracker Image Plane Marker</li>
+                </ul>
+                <p>Enhancements:</p>
+                <ul>
+                    <li>Faster Line Art loading time</li>
+                    <li>Library Overrides improvements</li>
+                    <li>Massive performance gains importing large amounts of objects in USD, Alembic, and OBJ</li>
+                    <li>UV improvements</li>
+                    <li>Improved sculpting performance in EEVEE</li>
+                    <li>Cycles GPU rendering improvements for AMD GPUs and Apple Silicon</li>
+                </ul>
+            </description>
+        </release>
+        <release version="3.2" date="2022-06-08">
+            <description>
+                <p>New features:</p>
+                <ul>
+                    <li>Cycles Light Groups</li>
+                    <li>Cycles Shadow Caustics using Manifold Next Event Estimation</li>
+                    <li>New Tools and usability improvements for Polygon Painting</li>
+                    <li>More Geometry Nodes, including Duplicate Elements</li>
+                    <li>Asset Browser: Support for Asset Collections</li>
+                </ul>
+                <p>Enhancements:</p>
+                <ul>
+                    <li>Enhanced channels in the video sequencer</li>
+                    <li>Support for WebP format</li>
+                    <li>New experimental OBJ importer</li>
+                    <li>Motion Paths improvements</li>
+                    <li>Grease Pencil Envelope Modifier</li>
+                    <li>New Curve Pen Tool</li>
+                </ul>
+            </description>
+        </release>
         <release version="3.1" date="2022-03-09">
             <description>
                 <p>New features:</p>
diff --git a/release/scripts/addons b/release/scripts/addons
-Subproject 7a8502871c34db0343cc7de52d6b49b15a84238
+Subproject 25ffc6f430fc995b1c046b01acba1c3e6c1896b
diff --git a/release/scripts/startup/nodeitems_builtins.py b/release/scripts/startup/nodeitems_builtins.py
index 2342ba33a3b..2091457aa59 100644
--- a/release/scripts/startup/nodeitems_builtins.py
+++ b/release/scripts/startup/nodeitems_builtins.py
@@ -424,7 +424,6 @@ shader_node_categories = [
         NodeItem("ShaderNodeTexWhiteNoise"),
     ]),
     ShaderNodeCategory("SH_NEW_OP_COLOR", "Color", items=[
-        NodeItem("ShaderNodeMixRGB"),
         NodeItem("ShaderNodeRGBCurve"),
         NodeItem("ShaderNodeInvert"),
         NodeItem("ShaderNodeLightFalloff"),
@@ -448,6 +447,7 @@ shader_node_categories = [
         NodeItem("ShaderNodeFloatCurve"),
         NodeItem("ShaderNodeClamp"),
         NodeItem("ShaderNodeMath"),
+        NodeItem("ShaderNodeMix"),
         NodeItem("ShaderNodeValToRGB"),
         NodeItem("ShaderNodeRGBToBW"),
         NodeItem("ShaderNodeShaderToRGB", poll=object_eevee_shader_nodes_poll),
@@ -651,7 +651,6 @@ geometry_node_categories = [
         NodeItem("GeometryNodeStoreNamedAttribute"),
     ]),
     GeometryNodeCategory("GEO_COLOR", "Color", items=[
-        NodeItem("ShaderNodeMixRGB"),
         NodeItem("ShaderNodeRGBCurve"),
         NodeItem("ShaderNodeValToRGB"),
         NodeItem("FunctionNodeSeparateColor"),
@@ -719,6 +718,7 @@ geometry_node_categories = [
         NodeItem("FunctionNodeBooleanMath"),
         NodeItem("FunctionNodeRotateEuler"),
         NodeItem("FunctionNodeCompare"),
+        NodeItem("ShaderNodeMix"),
         NodeItem("FunctionNodeFloatToInt"),
         NodeItem("GeometryNodeSwitch"),
         NodeItem("FunctionNodeRandomValue"),
diff --git a/source/blender/blenfont/intern/blf_font.c b/source/blender/blenfont/intern/blf_font.c
index 886c34654c4..fb157c71172 100644
--- a/source/blender/blenfont/intern/blf_font.c
+++ b/source/blender/blenfont/intern/blf_font.c
@@ -110,6 +110,10 @@ static FT_Error blf_cache_face_requester(FTC_FaceID faceID,
     font->face->generic.data = font;
     font->face->generic.finalizer = blf_face_finalizer;
   }
+  else {
+    /* Clear this on error to avoid exception in FTC_Manager_LookupFace. */
+    *face = NULL;
+  }
 
   return err;
 }
diff --git a/source/blender/blenfont/intern/blf_font_default.c b/source/blender/blenfont/intern/blf_font_default.c
index a88da6099e5..d35692f6eae 100644
--- a/source/blender/blenfont/intern/blf_font_default.c
+++ b/source/blender/blenfont/intern/blf_font_default.c
@@ -16,6 +16,10 @@
 
 #include "BKE_appdir.h"
 
+#ifdef WIN32
+#  include "BLI_winstuff.h"
+#endif
+
 static int blf_load_font_default(const char *filename, const bool unique)
 {
   const char *dir = BKE_appdir_folder_id(BLENDER_DATAFILES, BLF_DATAFILES_FONTS_DIR);
@@ -47,36 +51,51 @@ int BLF_load_mono_default(const bool unique)
   return font_id;
 }
 
-void BLF_load_font_stack()
+static void blf_load_datafiles_dir(void)
 {
-  /* Load these if not already, might have been replaced by user custom. */
-  BLF_load_default(false);
-  BLF_load_mono_default(false);
-
   const char *datafiles_fonts_dir = BLF_DATAFILES_FONTS_DIR SEP_STR;
   const char *path = BKE_appdir_folder_id(BLENDER_DATAFILES, datafiles_fonts_dir);
   if (UNLIKELY(!path)) {
     fprintf(stderr, "Font data directory \"%s\" could not be detected!\n", datafiles_fonts_dir);
+    return;
   }
-  else if (UNLIKELY(!BLI_exists(path))) {
+  if (UNLIKELY(!BLI_exists(path))) {
     fprintf(stderr, "Font data directory \"%s\" does not exist!\n", path);
+    return;
   }
-  else {
-    struct direntry *dir;
-    uint num_files = BLI_filelist_dir_contents(path, &dir);
-    for (int f = 0; f < num_files; f++) {
-      if (!FILENAME_IS_CURRPAR(dir[f].relname) && !BLI_is_dir(dir[f].path)) {
-        if (!BLF_is_loaded(dir[f].path)) {
-          int font_id = BLF_load(dir[f].path);
-          if (font_id == -1) {
-            fprintf(stderr, "Unable to load font: %s\n", dir[f].path);
-          }
-          else {
-            BLF_enable(font_id, BLF_DEFAULT);
-          }
-        }
-      }
+
+  struct direntry *file_list;
+  uint file_list_num = BLI_filelist_dir_contents(path, &file_list);
+  for (int i = 0; i < file_list_num; i++) {
+    if (S_ISDIR(file_list[i].s.st_mode)) {
+      continue;
+    }
+
+    const char *filepath = file_list[i].path;
+    if (!BLI_path_extension_check_n(
+            filepath, ".ttf", ".ttc", ".otf", ".otc", ".woff", ".woff2", NULL)) {
+      continue;
+    }
+    if (BLF_is_loaded(filepath)) {
+      continue;
     }
-    BLI_filelist_free(dir, num_files);
+
+    /* Attempt to load the font. */
+    int font_id = BLF_load(filepath);
+    if (font_id == -1) {
+      fprintf(stderr, "Unable to load font: %s\n", filepath);
+      continue;
+    }
+
+    BLF_enable(font_id, BLF_DEFAULT);
   }
+  BLI_filelist_free(file_list, file_list_num);
+}
+
+void BLF_load_font_stack()
+{
+  /* Load these if not already, might have been replaced by user custom. */
+  BLF_load_default(false);
+  BLF_load_mono_default(false);
+  blf_load_datafiles_dir();
 }
diff --git a/source/blender/blenkernel/BKE_attribute.hh b/source/blender/blenkernel/BKE_attribute.hh
index c2f65c93cbe..6284cce9dc0 100644
--- a/source/blender/blenkernel/BKE_attribute.hh
+++ b/source/blender/blenkernel/BKE_attribute.hh
@@ -73,8 +73,13 @@ struct AttributeKind {
  */
 struct AttributeInit {
   enum class Type {
-    Default,
+    /** #AttributeInitConstruct. */
+    Construct,
+    /** #AttributeInitDefaultValue. */
+    DefaultValue,
+    /** #AttributeInitVArray. */
     VArray,
+    /** #AttributeInitMoveArray. */
     MoveArray,
   };
   Type type;
@@ -84,11 +89,20 @@ struct AttributeInit {
 };
 
 /**
- * Create an attribute using the default value for the data type.
- * The default values may depend on the attribute provider implementation.
+ * Default construct new attribute values. Does nothing for trivial types. This should be used
+ * if all attribute element values will be set by the caller after creating the attribute.
  */
-struct AttributeInitDefault : public AttributeInit {
-  AttributeInitDefault() : AttributeInit(Type::Default)
+struct AttributeInitConstruct : public AttributeInit {
+  AttributeInitConstruct() : AttributeInit(Type::Construct)
+  {
+  }
+};
+
+/**
+ * Create an attribute using the default value for the data type (almost always "zero").
+ */
+struct AttributeInitDefaultValue : public AttributeInit {
+  AttributeInitDefaultValue() : AttributeInit(Type::DefaultValue)
   {
   }
 };
@@ -96,14 +110,11 @@ struct AttributeInitDefault : public AttributeInit {
 /**
  * Create an attribute by copying data from an existing virtual array. The virtual array
  * must have the same type as the newly created attribute.
- *
- * Note that this can be used to fill the new attribute with the default
  */
 struct AttributeInitVArray : public AttributeInit {
-  blender::GVArray varray;
+  GVArray varray;
 
-  AttributeInitVArray(blender::GVArray varray)
-      : AttributeInit(Type::VArray), varray(std::move(varray))
+  AttributeInitVArray(GVArray varray) : AttributeInit(Type::VArray), varray(std::move(varray))
   {
   }
 };
@@ -119,10 +130,10 @@ struct AttributeInitVArray : public AttributeInit {
  * The array must be allocated with MEM_*, since `attribute_try_create` will free the array if it
  * can't be used directly, and that is generally how Blender expects custom data to be allocated.
  */
-struct AttributeInitMove : public AttributeInit {
+struct AttributeInitMoveArray : public AttributeInit {
   void *data = nullptr;
 
-  AttributeInitMove(void *data) : AttributeInit(Type::MoveArray), data(data)
+  AttributeInitMoveArray(void *data) : AttributeInit(Type::MoveArray), data(data)
   {
   }
 };
@@ -579,7 +590,7 @@ class MutableAttributeAccessor : public AttributeAccessor {
       const AttributeIDRef &attribute_id,
       const eAttrDomain domain,
       const eCustomDataType data_type,
-      const AttributeInit &initializer = AttributeInitDefault());
+      const AttributeInit &initializer = AttributeInitDefaultValue());
 
   /**
    * Same as above, but returns a type that makes it easier to work with the attribute as a span.
@@ -590,7 +601,7 @@ class MutableAttributeAccessor : public AttributeAccessor {
       const AttributeIDRef &attribute_id,
       const eAttrDomain domain,
       const eCustomDataType data_type,
-      const AttributeInit &initializer = AttributeInitDefault());
+      const AttributeInit &initializer = AttributeInitDefaultValue());
 
   /**
    * Same as above, but should be used when the type is known at compile time.
@@ -599,7 +610,7 @@ class MutableAttributeAccessor : public AttributeAccessor {
   AttributeWriter<T> lookup_or_add_for_write(
       const AttributeIDRef &attribute_id,
       const eAttrDomain domain,
-      const AttributeInit &initializer = AttributeInitDefault())
+      const AttributeInit &initializer = AttributeInitDefaultValue())
   {
     const CPPType &cpp_type = CPPType::get<T>();
     const eCustomDataType data_type = cpp_type_to_custom_data_type(cpp_type);
@@ -613,7 +624,7 @@ class MutableAttributeAccessor : public AttributeAccessor {
   SpanAttributeWriter<T> lookup_or_add_for_write_span(
       const AttributeIDRef &attribute_id,
       const eAttrDomain domain,
-      const AttributeInit &initializer = AttributeInitDefault())
+      const AttributeInit &initializer = AttributeInitDefaultValue())
   {
     AttributeWriter<T> attribute = this->lookup_or_add_for_write<T>(
         attribute_id, domain, initializer);
diff --git a/source/blender/blenkernel/BKE_customdata.h b/source/blender/blenkernel/BKE_customdata.h
index 3db75fff12c..44a4f4b5395 100644
--- a/source/blender/blenkernel/BKE_customdata.h
+++ b/source/blender/blenkernel/BKE_customdata.h
@@ -55,14 +55,17 @@ extern const CustomData_MeshMasks CD_MASK_EVERYTHING;
 typedef enum eCDAllocType {
   /** Use the data pointer. */
   CD_ASSIGN = 0,
-  /** Allocate blank memory. */
-  CD_CALLOC = 1,
-  /** Allocate and set to default. */
-  CD_DEFAULT = 2,
+  /** Allocate and set to default, which is usually just zeroed memory. */
+  CD_SET_DEFAULT = 2,
   /** Use data pointers, set layer flag NOFREE. */
   CD_REFERENCE = 3,
   /** Do a full copy of all layers, only allowed if source has same number of elements. */
   CD_DUPLICATE = 4,
+  /**
+   * Default construct new layer values. Does nothing for trivial types. This should be used
+   * if all layer values will be set by the caller after creating the layer.
+   */
+  CD_CONSTRUCT = 5,
 } eCDAllocType;
 
 #define CD_TYPE_AS_MASK(_type) (eCustomDataMask)((eCustomDataMask)1 << (eCustomDataMask)(_type))
diff --git a/source/blender/blenkernel/BKE_mesh.h b/source/blender/blenkernel/BKE_mesh.h
index 70f549a6d23..ec6799ee995 100644
--- a/source/blender/blenkernel/BKE_mesh.h
+++ b/source/blender/blenkernel/BKE_mesh.h
@@ -1043,7 +1043,7 @@ BLI_INLINE int *BKE_mesh_material_indices_for_write(Mesh *mesh)
     return indices;
   }
   return (int *)CustomData_add_layer_named(
-      &mesh->pdata, CD_PROP_INT32, CD_CALLOC, NULL, mesh->totpoly, "material_index");
+      &mesh->pdata, CD_PROP_INT32, CD_SET_DEFAULT, NULL, mesh->totpoly, "material_index");
 }
 
 #ifdef __cplusplus
diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h
index 509de0620c6..1118552b643 100644
--- a/source/blender/blenkernel/BKE_node.h
+++ b/source/blender/blenkernel/BKE_node.h
@@ -1102,7 +1102,7 @@ void BKE_nodetree_remove_layer_n(struct bNodeTree *ntree, struct Scene *scene, i
 //#define SH_NODE_MATERIAL  100
 #define SH_NODE_RGB 101
 #define SH_NODE_VALUE 102
-#define SH_NODE_MIX_RGB 103
+#define SH_NODE_MIX_RGB_LEGACY 103
 #define SH_NODE_VALTORGB 104
 #define SH_NODE_RGBTOBW 105
 #define SH_NODE_SHADERTORGB 106
@@ -1205,6 +1205,7 @@ void BKE_nodetree_remove_layer_n(struct bNodeTree *ntree, struct Scene *scene, i
 #define SH_NODE_POINT_INFO 710
 #define SH_NODE_COMBINE_COLOR 711
 #define SH_NODE_SEPARATE_COLOR 712
+#define SH_NODE_MIX 713
 
 /** \} */
 
diff --git a/source/blender/blenkernel/BKE_node_runtime.hh b/source/blender/blenkernel/BKE_node_runtime.hh
index f5fb53f962b..4c13f73848c 100644
--- a/source/blender/blenkernel/BKE_node_runtime.hh
+++ b/source/blender/blenkernel/BKE_node_runtime.hh
@@ -3,9 +3,20 @@
 #pragma once
 
 #include <memory>
+#include <mutex>
 
-#include "BLI_sys_types.h"
+#include "BLI_multi_value_map.hh"
 #include "BLI_utility_mixins.hh"
+#include "BLI_vector.hh"
+
+#include "DNA_node_types.h"
+
+#include "BKE_node.h"
+
+struct bNode;
+struct bNodeSocket;
+struct bNodeTree;
+struct bNodeType;
 
 namespace blender::nodes {
 struct FieldInferencingInterface;
@@ -36,6 +47,32 @@ class bNodeTreeRuntime : NonCopyable, NonMovable {
 
   /** Information about how inputs and outputs of the node group interact with fields. */
   std::unique_ptr<nodes::FieldInferencingInterface> field_inferencing_interface;
+
+  /**
+   * Protects access to all topology cache variables below. This is necessary so that the cache can
+   * be updated on a const #bNodeTree.
+   */
+  std::mutex topology_cache_mutex;
+  bool topology_cache_is_dirty = true;
+  bool topology_cache_exists = false;
+  /**
+   * Under some circumstances, it can be useful to use the cached data while editing the
+   * #bNodeTree. By default, this is protected against using an assert.
+   */
+  mutable std::atomic<int> allow_use_dirty_topology_cache = 0;
+
+  /** Only valid when #topology_cache_is_dirty is false. */
+  Vector<bNode *> nodes;
+  Vector<bNodeLink *> links;
+  Vector<bNodeSocket *> sockets;
+  Vector<bNodeSocket *> input_sockets;
+  Vector<bNodeSocket *> output_sockets;
+  MultiValueMap<const bNodeType *, bNode *> nodes_by_type;
+  Vector<bNode *> toposort_left_to_right;
+  Vector<bNode *> toposort_right_to_left;
+  bool has_link_cycle = false;
+  bool has_undefined_nodes_or_sockets = false;
+  bNode *group_output_node = nullptr;
 };
 
 /**
@@ -47,12 +84,24 @@ class bNodeSocketRuntime : NonCopyable, NonMovable {
  public:
   /**
    * References a socket declaration that is owned by `node->declaration`. This is only runtime
-   * data. It has to be updated when the node declaration changes.
+   * data. It has to be updated when the node declaration changes. Access can be allowed by using
+   * #AllowUsingOutdatedInfo.
    */
   const SocketDeclarationHandle *declaration = nullptr;
 
   /** #eNodeTreeChangedFlag. */
   uint32_t changed_flag = 0;
+
+  /** Only valid when #topology_cache_is_dirty is false. */
+  Vector<bNodeLink *> directly_linked_links;
+  Vector<bNodeSocket *> directly_linked_sockets;
+  Vector<bNodeSocket *> logically_linked_sockets;
+  Vector<bNodeSocket *> logically_linked_skipped_sockets;
+  bNode *owner_node = nullptr;
+  bNodeSocket *internal_link_input = nullptr;
+  int index_in_node = -1;
+  int index_in_all_sockets = -1;
+  int index_in_inout_sockets = -1;
 };
 
 /**
@@ -84,6 +133,395 @@ class bNodeRuntime : NonCopyable, NonMovable {
 
   /** #eNodeTreeChangedFlag. */
   uint32_t changed_flag = 0;
+
+  /** Only valid if #topology_cache_is_dirty is false. */
+  Vector<bNodeSocket *> inputs;
+  Vector<bNodeSocket *> outputs;
+  Vector<bNodeLink *> internal_links;
+  Map<StringRefNull, bNodeSocket *> inputs_by_identifier;
+  Map<StringRefNull, bNodeSocket *> outputs_by_identifier;
+  int index_in_tree = -1;
+  bool has_linked_inputs = false;
+  bool has_linked_outputs = false;
+  bNodeTree *owner_tree = nullptr;
 };
 
+namespace node_tree_runtime {
+
+class AllowUsingOutdatedInfo : NonCopyable, NonMovable {
+ private:
+  const bNodeTree &tree_;
+
+ public:
+  AllowUsingOutdatedInfo(const bNodeTree &tree) : tree_(tree)
+  {
+    tree_.runtime->allow_use_dirty_topology_cache.fetch_add(1);
+  }
+
+  ~AllowUsingOutdatedInfo()
+  {
+    tree_.runtime->allow_use_dirty_topology_cache.fetch_sub(1);
+  }
+};
+
+inline bool topology_cache_is_available(const bNodeTree &tree)
+{
+  if (!tree.runtime->topology_cache_exists) {
+    return false;
+  }
+  if (tree.runtime->allow_use_dirty_topology_cache.load() > 0) {
+    return true;
+  }
+  if (tree.runtime->topology_cache_is_dirty) {
+    return false;
+  }
+  return true;
+}
+
+inline bool topology_cache_is_available(const bNode &node)
+{
+  const bNodeTree *ntree = node.runtime->owner_tree;
+  if (ntree == nullptr) {
+    return false;
+  }
+  return topology_cache_is_available(*ntree);
+}
+
+inline bool topology_cache_is_available(const bNodeSocket &socket)
+{
+  const bNode *node = socket.runtime->owner_node;
+  if (node == nullptr) {
+    return false;
+  }
+  return topology_cache_is_available(*node);
+}
+
+}  // namespace node_tree_runtime
+
 }  // namespace blender::bke
+
+/* -------------------------------------------------------------------- */
+/** \name #bNodeTree Inline Methods
+ * \{ */
+
+inline blender::Span<bNode *> bNodeTree::nodes_by_type(const blender::StringRefNull type_idname)
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->nodes_by_type.lookup(nodeTypeFind(type_idname.c_str()));
+}
+
+inline blender::Span<const bNode *> bNodeTree::nodes_by_type(
+    const blender::StringRefNull type_idname) const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->nodes_by_type.lookup(nodeTypeFind(type_idname.c_str()));
+}
+
+inline blender::Span<const bNode *> bNodeTree::toposort_left_to_right() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->toposort_left_to_right;
+}
+
+inline blender::Span<const bNode *> bNodeTree::toposort_right_to_left() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->toposort_right_to_left;
+}
+
+inline blender::Span<const bNode *> bNodeTree::all_nodes() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->nodes;
+}
+
+inline blender::Span<bNode *> bNodeTree::all_nodes()
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->nodes;
+}
+
+inline bool bNodeTree::has_link_cycle() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->has_link_cycle;
+}
+
+inline bool bNodeTree::has_undefined_nodes_or_sockets() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->has_undefined_nodes_or_sockets;
+}
+
+inline const bNode *bNodeTree::group_output_node() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->group_output_node;
+}
+
+inline blender::Span<const bNodeSocket *> bNodeTree::all_input_sockets() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->input_sockets;
+}
+
+inline blender::Span<bNodeSocket *> bNodeTree::all_input_sockets()
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->input_sockets;
+}
+
+inline blender::Span<const bNodeSocket *> bNodeTree::all_output_sockets() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->output_sockets;
+}
+
+inline blender::Span<bNodeSocket *> bNodeTree::all_output_sockets()
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->output_sockets;
+}
+
+inline blender::Span<const bNodeSocket *> bNodeTree::all_sockets() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->sockets;
+}
+
+inline blender::Span<bNodeSocket *> bNodeTree::all_sockets()
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->sockets;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name #bNode Inline Methods
+ * \{ */
+
+inline blender::Span<bNodeSocket *> bNode::input_sockets()
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->inputs;
+}
+
+inline blender::Span<bNodeSocket *> bNode::output_sockets()
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->outputs;
+}
+
+inline blender::Span<const bNodeSocket *> bNode::input_sockets() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->inputs;
+}
+
+inline blender::Span<const bNodeSocket *> bNode::output_sockets() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->outputs;
+}
+
+inline bNodeSocket &bNode::input_socket(int index)
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->inputs[index];
+}
+
+inline bNodeSocket &bNode::output_socket(int index)
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->outputs[index];
+}
+
+inline const bNodeSocket &bNode::input_socket(int index) const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->inputs[index];
+}
+
+inline const bNodeSocket &bNode::output_socket(int index) const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->outputs[index];
+}
+
+inline const bNodeSocket &bNode::input_by_identifier(blender::StringRef identifier) const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->inputs_by_identifier.lookup_as(identifier);
+}
+
+inline const bNodeSocket &bNode::output_by_identifier(blender::StringRef identifier) const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->outputs_by_identifier.lookup_as(identifier);
+}
+
+inline blender::StringRefNull bNode::label_or_name() const
+{
+  if (this->label[0] == '\0') {
+    return this->name;
+  }
+  return this->label;
+}
+
+inline bool bNode::is_muted() const
+{
+  return this->flag & NODE_MUTED;
+}
+
+inline bool bNode::is_reroute() const
+{
+  return this->type == NODE_REROUTE;
+}
+
+inline bool bNode::is_frame() const
+{
+  return this->type == NODE_FRAME;
+}
+
+inline bool bNode::is_group() const
+{
+  return ELEM(this->type, NODE_GROUP, NODE_CUSTOM_GROUP);
+}
+
+inline bool bNode::is_group_input() const
+{
+  return this->type == NODE_GROUP_INPUT;
+}
+
+inline bool bNode::is_group_output() const
+{
+  return this->type == NODE_GROUP_OUTPUT;
+}
+
+inline blender::Span<const bNodeLink *> bNode::internal_links_span() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->internal_links;
+}
+
+inline const blender::nodes::NodeDeclaration *bNode::declaration() const
+{
+  BLI_assert(this->runtime->declaration != nullptr);
+  return this->runtime->declaration;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name #bNodeLink Inline Methods
+ * \{ */
+
+inline bool bNodeLink::is_muted() const
+{
+  return this->flag & NODE_LINK_MUTED;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name #bNodeSocket Inline Methods
+ * \{ */
+
+inline int bNodeSocket::index() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->index_in_node;
+}
+
+inline int bNodeSocket::index_in_tree() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->index_in_all_sockets;
+}
+
+inline bool bNodeSocket::is_available() const
+{
+  return (this->flag & SOCK_UNAVAIL) == 0;
+}
+
+inline bNode &bNodeSocket::owner_node()
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->owner_node;
+}
+
+inline const bNodeTree &bNodeSocket::owner_tree() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->owner_node->runtime->owner_tree;
+}
+
+inline blender::Span<const bNodeSocket *> bNodeSocket::logically_linked_sockets() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->logically_linked_sockets;
+}
+
+inline blender::Span<const bNodeLink *> bNodeSocket::directly_linked_links() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->directly_linked_links;
+}
+
+inline blender::Span<bNodeLink *> bNodeSocket::directly_linked_links()
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->directly_linked_links;
+}
+
+inline blender::Span<const bNodeSocket *> bNodeSocket::directly_linked_sockets() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return this->runtime->directly_linked_sockets;
+}
+
+inline bool bNodeSocket::is_directly_linked() const
+{
+  return !this->directly_linked_links().is_empty();
+}
+
+inline bool bNodeSocket::is_logically_linked() const
+{
+  return !this->logically_linked_sockets().is_empty();
+}
+
+inline const bNodeSocket *bNodeSocket::internal_link_input() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  BLI_assert(this->in_out == SOCK_OUT);
+  return this->runtime->internal_link_input;
+}
+
+template<typename T> const T *bNodeSocket::default_value_typed() const
+{
+  return static_cast<const T *>(this->default_value);
+}
+
+inline bool bNodeSocket::is_input() const
+{
+  return this->in_out == SOCK_IN;
+}
+
+inline bool bNodeSocket::is_output() const
+{
+  return this->in_out == SOCK_OUT;
+}
+
+inline bool bNodeSocket::is_multi_input() const
+{
+  return this->flag & SOCK_MULTI_INPUT;
+}
+
+inline const bNode &bNodeSocket::owner_node() const
+{
+  BLI_assert(blender::bke::node_tree_runtime::topology_cache_is_available(*this));
+  return *this->runtime->owner_node;
+}
+
+/** \} */
diff --git a/source/blender/blenkernel/BKE_pointcloud.h b/source/blender/blenkernel/BKE_pointcloud.h
index ee90fea6506..62a1824d844 100644
--- a/source/blender/blenkernel/BKE_pointcloud.h
+++ b/source/blender/blenkernel/BKE_pointcloud.h
@@ -33,8 +33,6 @@ bool BKE_pointcloud_customdata_required(const struct PointCloud *pointcloud, con
 
 /* Dependency Graph */
 
-struct PointCloud *BKE_pointcloud_new_for_eval(const struct PointCloud *pointcloud_src,
-                                               int totpoint);
 struct PointCloud *BKE_pointcloud_copy_for_eval(struct PointCloud *pointcloud_src, bool reference);
 
 void BKE_pointcloud_data_update(struct Depsgraph *depsgraph,
diff --git a/source/blender/blenkernel/CMakeLists.txt b/source/blender/blenkernel/CMakeLists.txt
index 465573745ec..61549a66e1f 100644
--- a/source/blender/blenkernel/CMakeLists.txt
+++ b/source/blender/blenkernel/CMakeLists.txt
@@ -230,6 +230,7 @@ set(SRC
   intern/multires_versioning.c
   intern/nla.c
   intern/node.cc
+  intern/node_runtime.cc
   intern/node_tree_update.cc
   intern/object.cc
   intern/object_deform.c
diff --git a/source/blender/blenkernel/intern/DerivedMesh.cc b/source/blender/blenkernel/intern/DerivedMesh.cc
index 2ce5863c176..e83720e99f1 100644
--- a/source/blender/blenkernel/intern/DerivedMesh.cc
+++ b/source/blender/blenkernel/intern/DerivedMesh.cc
@@ -95,7 +95,7 @@ static MVert *dm_getVertArray(DerivedMesh *dm)
 
   if (!mvert) {
     mvert = (MVert *)CustomData_add_layer(
-        &dm->vertData, CD_MVERT, CD_CALLOC, nullptr, dm->getNumVerts(dm));
+        &dm->vertData, CD_MVERT, CD_SET_DEFAULT, nullptr, dm->getNumVerts(dm));
     CustomData_set_layer_flag(&dm->vertData, CD_MVERT, CD_FLAG_TEMPORARY);
     dm->copyVertArray(dm, mvert);
   }
@@ -109,7 +109,7 @@ static MEdge *dm_getEdgeArray(DerivedMesh *dm)
 
   if (!medge) {
     medge = (MEdge *)CustomData_add_layer(
-        &dm->edgeData, CD_MEDGE, CD_CALLOC, nullptr, dm->getNumEdges(dm));
+        &dm->edgeData, CD_MEDGE, CD_SET_DEFAULT, nullptr, dm->getNumEdges(dm));
     CustomData_set_layer_flag(&dm->edgeData, CD_MEDGE, CD_FLAG_TEMPORARY);
     dm->copyEdgeArray(dm, medge);
   }
@@ -123,7 +123,7 @@ static MLoop *dm_getLoopArray(DerivedMesh *dm)
 
   if (!mloop) {
     mloop = (MLoop *)CustomData_add_layer(
-        &dm->loopData, CD_MLOOP, CD_CALLOC, nullptr, dm->getNumLoops(dm));
+        &dm->loopData, CD_MLOOP, CD_SET_DEFAULT, nullptr, dm->getNumLoops(dm));
     CustomData_set_layer_flag(&dm->loopData, CD_MLOOP, CD_FLAG_TEMPORARY);
     dm->copyLoopArray(dm, mloop);
   }
@@ -137,7 +137,7 @@ static MPoly *dm_getPolyArray(DerivedMesh *dm)
 
   if (!mpoly) {
     mpoly = (MPoly *)CustomData_add_layer(
-        &dm->polyData, CD_MPOLY, CD_CALLOC, nullptr, dm->getNumPolys(dm));
+        &dm->polyData, CD_MPOLY, CD_SET_DEFAULT, nullptr, dm->getNumPolys(dm));
     CustomData_set_layer_flag(&dm->polyData, CD_MPOLY, CD_FLAG_TEMPORARY);
     dm->copyPolyArray(dm, mpoly);
   }
@@ -284,11 +284,11 @@ void DM_from_template(DerivedMesh *dm,
                       int numPolys)
 {
   const CustomData_MeshMasks *mask = &CD_MASK_DERIVEDMESH;
-  CustomData_copy(&source->vertData, &dm->vertData, mask->vmask, CD_CALLOC, numVerts);
-  CustomData_copy(&source->edgeData, &dm->edgeData, mask->emask, CD_CALLOC, numEdges);
-  CustomData_copy(&source->faceData, &dm->faceData, mask->fmask, CD_CALLOC, numTessFaces);
-  CustomData_copy(&source->loopData, &dm->loopData, mask->lmask, CD_CALLOC, numLoops);
-  CustomData_copy(&source->polyData, &dm->polyData, mask->pmask, CD_CALLOC, numPolys);
+  CustomData_copy(&source->vertData, &dm->vertData, mask->vmask, CD_SET_DEFAULT, numVerts);
+  CustomData_copy(&source->edgeData, &dm->edgeData, mask->emask, CD_SET_DEFAULT, numEdges);
+  CustomData_copy(&source->faceData, &dm->faceData, mask->fmask, CD_SET_DEFAULT, numTessFaces);
+  CustomData_copy(&source->loopData, &dm->loopData, mask->lmask, CD_SET_DEFAULT, numLoops);
+  CustomData_copy(&source->polyData, &dm->polyData, mask->pmask, CD_SET_DEFAULT, numPolys);
 
   dm->cd_flag = source->cd_flag;
 
@@ -584,7 +584,7 @@ static void add_orco_mesh(Object *ob, BMEditMesh *em, Mesh *mesh, Mesh *mesh_orc
     }
 
     if (!(layerorco = (float(*)[3])CustomData_get_layer(&mesh->vdata, layer))) {
-      CustomData_add_layer(&mesh->vdata, layer, CD_CALLOC, nullptr, mesh->totvert);
+      CustomData_add_layer(&mesh->vdata, layer, CD_SET_DEFAULT, nullptr, mesh->totvert);
       BKE_mesh_update_customdata_pointers(mesh, false);
 
       layerorco = (float(*)[3])CustomData_get_layer(&mesh->vdata, layer);
@@ -741,6 +741,7 @@ static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
                                 Mesh **r_final,
                                 GeometrySet **r_geometry_set)
 {
+  using namespace blender::bke;
   /* Input and final mesh. Final mesh is only created the moment the first
    * constructive modifier is executed, or a deform modifier needs normals
    * or certain data layers. */
@@ -824,18 +825,13 @@ static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
       mesh_final = BKE_mesh_copy_for_eval(mesh_input, true);
       ASSERT_IS_VALID_MESH(mesh_final);
     }
-    float3 *rest_positions = static_cast<float3 *>(CustomData_add_layer_named(&mesh_final->vdata,
-                                                                              CD_PROP_FLOAT3,
-                                                                              CD_DEFAULT,
-                                                                              nullptr,
-                                                                              mesh_final->totvert,
-                                                                              "rest_position"));
-    blender::threading::parallel_for(
-        IndexRange(mesh_final->totvert), 1024, [&](const IndexRange range) {
-          for (const int i : range) {
-            rest_positions[i] = mesh_final->mvert[i].co;
-          }
-        });
+    MutableAttributeAccessor attributes = mesh_attributes_for_write(*mesh_final);
+    SpanAttributeWriter<float3> rest_positions =
+        attributes.lookup_or_add_for_write_only_span<float3>("rest_position", ATTR_DOMAIN_POINT);
+    if (rest_positions) {
+      attributes.lookup<float3>("position").materialize(rest_positions.span);
+      rest_positions.finish();
+    }
   }
 
   /* Apply all leading deform modifiers. */
@@ -1007,11 +1003,11 @@ static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
             ((nextmask.vmask | nextmask.emask | nextmask.pmask) & CD_MASK_ORIGINDEX)) {
           /* calc */
           CustomData_add_layer(
-              &mesh_final->vdata, CD_ORIGINDEX, CD_CALLOC, nullptr, mesh_final->totvert);
+              &mesh_final->vdata, CD_ORIGINDEX, CD_CONSTRUCT, nullptr, mesh_final->totvert);
           CustomData_add_layer(
-              &mesh_final->edata, CD_ORIGINDEX, CD_CALLOC, nullptr, mesh_final->totedge);
+              &mesh_final->edata, CD_ORIGINDEX, CD_CONSTRUCT, nullptr, mesh_final->totedge);
           CustomData_add_layer(
-              &mesh_final->pdata, CD_ORIGINDEX, CD_CALLOC, nullptr, mesh_final->totpoly);
+              &mesh_final->pdata, CD_ORIGINDEX, CD_CONSTRUCT, nullptr, mesh_final->totpoly);
 
           /* Not worth parallelizing this,
            * gives less than 0.1% overall speedup in best of best cases... */
@@ -1047,8 +1043,11 @@ static void mesh_calc_modifiers(struct Depsgraph *depsgraph,
       /* add an origspace layer if needed */
       if ((md_datamask->mask.lmask) & CD_MASK_ORIGSPACE_MLOOP) {
         if (!CustomData_has_layer(&mesh_final->ldata, CD_ORIGSPACE_MLOOP)) {
-          CustomData_add_layer(
-              &mesh_final->ldata, CD_ORIGSPACE_MLOOP, CD_CALLOC, nullptr, mesh_final->totloop);
+          CustomData_add_layer(&mesh_final->ldata,
+                               CD_ORIGSPACE_MLOOP,
+                               CD_SET_DEFAULT,
+                               nullptr,
+                               mesh_final->totloop);
           mesh_init_origspace(mesh_final);
         }
       }
@@ -1510,8 +1509,11 @@ static void editbmesh_calc_modifiers(struct Depsgraph *depsgraph,
 
       if (mask.lmask & CD_MASK_ORIGSPACE_MLOOP) {
         if (!CustomData_has_layer(&mesh_final->ldata, CD_ORIGSPACE_MLOOP)) {
-          CustomData_add_layer(
-              &mesh_final->ldata, CD_ORIGSPACE_MLOOP, CD_CALLOC, nullptr, mesh_final->totloop);
+          CustomData_add_layer(&mesh_final->ldata,
+                               CD_ORIGSPACE_MLOOP,
+                               CD_SET_DEFAULT,
+                               nullptr,
+                               mesh_final->totloop);
           mesh_init_origspace(mesh_final);
         }
       }
diff --git a/source/blender/blenkernel/intern/attribute.cc b/source/blender/blenkernel/intern/attribute.cc
index ccaa6e56f08..0f7fabcff9b 100644
--- a/source/blender/blenkernel/intern/attribute.cc
+++ b/source/blender/blenkernel/intern/attribute.cc
@@ -247,7 +247,7 @@ CustomDataLayer *BKE_id_attribute_new(
     return nullptr;
   }
 
-  attributes->add(uniquename, domain, eCustomDataType(type), AttributeInitDefault());
+  attributes->add(uniquename, domain, eCustomDataType(type), AttributeInitDefaultValue());
 
   const int index = CustomData_get_named_layer_index(customdata, type, uniquename);
   return (index == -1) ? nullptr : &(customdata->layers[index]);
@@ -421,6 +421,7 @@ int BKE_id_attribute_data_length(ID *id, CustomDataLayer *layer)
       if (mesh->edit_mesh != nullptr) {
         return 0;
       }
+      break;
     }
     default:
       break;
diff --git a/source/blender/blenkernel/intern/attribute_access.cc b/source/blender/blenkernel/intern/attribute_access.cc
index 313e6a172ac..0187dbd6f78 100644
--- a/source/blender/blenkernel/intern/attribute_access.cc
+++ b/source/blender/blenkernel/intern/attribute_access.cc
@@ -160,12 +160,19 @@ static bool add_builtin_type_custom_data_layer_from_init(CustomData &custom_data
                                                          const AttributeInit &initializer)
 {
   switch (initializer.type) {
-    case AttributeInit::Type::Default: {
-      void *data = CustomData_add_layer(&custom_data, data_type, CD_DEFAULT, nullptr, domain_num);
+    case AttributeInit::Type::Construct: {
+      void *data = CustomData_add_layer(
+          &custom_data, data_type, CD_CONSTRUCT, nullptr, domain_num);
+      return data != nullptr;
+    }
+    case AttributeInit::Type::DefaultValue: {
+      void *data = CustomData_add_layer(
+          &custom_data, data_type, CD_SET_DEFAULT, nullptr, domain_num);
       return data != nullptr;
     }
     case AttributeInit::Type::VArray: {
-      void *data = CustomData_add_layer(&custom_data, data_type, CD_DEFAULT, nullptr, domain_num);
+      void *data = CustomData_add_layer(
+          &custom_data, data_type, CD_CONSTRUCT, nullptr, domain_num);
       if (data == nullptr) {
         return false;
       }
@@ -174,7 +181,7 @@ static bool add_builtin_type_custom_data_layer_from_init(CustomData &custom_data
       return true;
     }
     case AttributeInit::Type::MoveArray: {
-      void *source_data = static_cast<const AttributeInitMove &>(initializer).data;
+      void *source_data = static_cast<const AttributeInitMoveArray &>(initializer).data;
       void *data = CustomData_add_layer(
           &custom_data, data_type, CD_ASSIGN, source_data, domain_num);
       if (data == nullptr) {
@@ -215,14 +222,19 @@ static bool add_custom_data_layer_from_attribute_init(const AttributeIDRef &attr
 {
   const int old_layer_num = custom_data.totlayer;
   switch (initializer.type) {
-    case AttributeInit::Type::Default: {
+    case AttributeInit::Type::Construct: {
       add_generic_custom_data_layer(
-          custom_data, data_type, CD_DEFAULT, nullptr, domain_num, attribute_id);
+          custom_data, data_type, CD_CONSTRUCT, nullptr, domain_num, attribute_id);
+      break;
+    }
+    case AttributeInit::Type::DefaultValue: {
+      add_generic_custom_data_layer(
+          custom_data, data_type, CD_SET_DEFAULT, nullptr, domain_num, attribute_id);
       break;
     }
     case AttributeInit::Type::VArray: {
       void *data = add_generic_custom_data_layer(
-          custom_data, data_type, CD_DEFAULT, nullptr, domain_num, attribute_id);
+          custom_data, data_type, CD_CONSTRUCT, nullptr, domain_num, attribute_id);
       if (data != nullptr) {
         const GVArray &varray = static_cast<const AttributeInitVArray &>(initializer).varray;
         varray.materialize_to_uninitialized(varray.index_range(), data);
@@ -230,7 +242,7 @@ static bool add_custom_data_layer_from_attribute_init(const AttributeIDRef &attr
       break;
     }
     case AttributeInit::Type::MoveArray: {
-      void *source_data = static_cast<const AttributeInitMove &>(initializer).data;
+      void *source_data = static_cast<const AttributeInitMoveArray &>(initializer).data;
       void *data = add_generic_custom_data_layer(
           custom_data, data_type, CD_ASSIGN, source_data, domain_num, attribute_id);
       if (source_data != nullptr && data == nullptr) {
@@ -722,7 +734,7 @@ bool CustomDataAttributes::create(const AttributeIDRef &attribute_id,
                                   const eCustomDataType data_type)
 {
   void *result = add_generic_custom_data_layer(
-      data, data_type, CD_DEFAULT, nullptr, size_, attribute_id);
+      data, data_type, CD_SET_DEFAULT, nullptr, size_, attribute_id);
   return result != nullptr;
 }
 
@@ -954,7 +966,8 @@ GSpanAttributeWriter MutableAttributeAccessor::lookup_or_add_for_write_span(
 GSpanAttributeWriter MutableAttributeAccessor::lookup_or_add_for_write_only_span(
     const AttributeIDRef &attribute_id, const eAttrDomain domain, const eCustomDataType data_type)
 {
-  GAttributeWriter attribute = this->lookup_or_add_for_write(attribute_id, domain, data_type);
+  GAttributeWriter attribute = this->lookup_or_add_for_write(
+      attribute_id, domain, data_type, AttributeInitConstruct());
   if (attribute) {
     return GSpanAttributeWriter{std::move(attribute), false};
   }
diff --git a/source/blender/blenkernel/intern/curves_geometry.cc b/source/blender/blenkernel/intern/curves_geometry.cc
index fe9f6775995..3f549b39a00 100644
--- a/source/blender/blenkernel/intern/curves_geometry.cc
+++ b/source/blender/blenkernel/intern/curves_geometry.cc
@@ -58,7 +58,7 @@ CurvesGeometry::CurvesGeometry(const int point_num, const int curve_num)
 
   CustomData_add_layer_named(&this->point_data,
                              CD_PROP_FLOAT3,
-                             CD_DEFAULT,
+                             CD_CONSTRUCT,
                              nullptr,
                              this->point_num,
                              ATTR_POSITION.c_str());
@@ -222,7 +222,7 @@ static MutableSpan<T> get_mutable_attribute(CurvesGeometry &curves,
     return {data, num};
   }
   data = (T *)CustomData_add_layer_named(
-      &custom_data, type, CD_CALLOC, nullptr, num, name.c_str());
+      &custom_data, type, CD_SET_DEFAULT, nullptr, num, name.c_str());
   MutableSpan<T> span = {data, num};
   if (num > 0 && span.first() != default_value) {
     span.fill(default_value);
diff --git a/source/blender/blenkernel/intern/customdata.cc b/source/blender/blenkernel/intern/customdata.cc
index fd0c781dd83..51edf8308c3 100644
--- a/source/blender/blenkernel/intern/customdata.cc
+++ b/source/blender/blenkernel/intern/customdata.cc
@@ -154,9 +154,15 @@ struct LayerTypeInfo {
   void (*swap)(void *data, const int *corner_indices);
 
   /**
-   * a function to set a layer's data to default values. if null, the
-   * default is assumed to be all zeros */
-  void (*set_default)(void *data, int count);
+   * Set values to the type's default. If undefined, the default is assumed to be zeroes.
+   * Memory pointed to by #data is expected to be uninitialized.
+   */
+  void (*set_default_value)(void *data, int count);
+  /**
+   * Construct and fill a valid value for the type. Necessary for non-trivial types.
+   * Memory pointed to by #data is expected to be uninitialized.
+   */
+  void (*construct)(void *data, int count);
 
   /** A function used by mesh validating code, must ensures passed item has valid data. */
   cd_validate validate;
@@ -312,6 +318,11 @@ static void layerInterp_mdeformvert(const void **sources,
   }
 }
 
+static void layerConstruct_mdeformvert(void *data, const int count)
+{
+  memset(data, 0, sizeof(MDeformVert) * count);
+}
+
 /** \} */
 
 /* -------------------------------------------------------------------- */
@@ -497,11 +508,6 @@ static bool layerValidate_propFloat(void *data, const uint totitems, const bool
 /** \name Callbacks for (#MIntProperty, #CD_PROP_INT32)
  * \{ */
 
-static void layerCopy_propInt(const void *source, void *dest, const int count)
-{
-  memcpy(dest, source, sizeof(MIntProperty) * count);
-}
-
 static void layerInterp_propInt(const void **sources,
                                 const float *weights,
                                 const float *UNUSED(sub_weights),
@@ -671,6 +677,11 @@ static void layerFree_mdisps(void *data, const int count, const int UNUSED(size)
   }
 }
 
+static void layerConstruct_mdisps(void *data, const int count)
+{
+  memset(data, 0, sizeof(MDisps) * count);
+}
+
 static bool layerRead_mdisps(CDataFile *cdf, void *data, const int count)
 {
   MDisps *d = static_cast<MDisps *>(data);
@@ -803,6 +814,11 @@ static void layerFree_grid_paint_mask(void *data, const int count, const int UNU
   }
 }
 
+static void layerConstruct_grid_paint_mask(void *data, const int count)
+{
+  memset(data, 0, sizeof(GridPaintMask) * count);
+}
+
 /** \} */
 
 /* -------------------------------------------------------------------- */
@@ -1645,30 +1661,23 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      layerFree_mdeformvert,
      layerInterp_mdeformvert,
      nullptr,
+     layerConstruct_mdeformvert,
      nullptr},
     /* 3: CD_MEDGE */
     {sizeof(MEdge), "MEdge", 1, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr},
     /* 4: CD_MFACE */
     {sizeof(MFace), "MFace", 1, nullptr, nullptr, nullptr, nullptr, nullptr, nullptr},
     /* 5: CD_MTFACE */
-    {sizeof(MTFace),    "MTFace",         1,
-     N_("UVMap"),       layerCopy_tface,  nullptr,
-     layerInterp_tface, layerSwap_tface,  layerDefault_tface,
-     nullptr,           nullptr,          nullptr,
-     nullptr,           nullptr,          nullptr,
-     nullptr,           nullptr,          nullptr,
-     nullptr,           layerMaxNum_tface},
-    /* 6: CD_MCOL */
-    /* 4 MCol structs per face */
-    {sizeof(MCol[4]),
-     "MCol",
-     4,
-     N_("Col"),
+    {sizeof(MTFace),
+     "MTFace",
+     1,
+     N_("UVMap"),
+     layerCopy_tface,
      nullptr,
+     layerInterp_tface,
+     layerSwap_tface,
      nullptr,
-     layerInterp_mcol,
-     layerSwap_mcol,
-     layerDefault_mcol,
+     layerDefault_tface,
      nullptr,
      nullptr,
      nullptr,
@@ -1679,7 +1688,16 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      nullptr,
      nullptr,
      nullptr,
-     layerMaxNum_mloopcol},
+     layerMaxNum_tface},
+    /* 6: CD_MCOL */
+    /* 4 MCol structs per face */
+    {sizeof(MCol[4]),  "MCol",         4,
+     N_("Col"),        nullptr,        nullptr,
+     layerInterp_mcol, layerSwap_mcol, layerDefault_mcol,
+     nullptr,          nullptr,        nullptr,
+     nullptr,          nullptr,        nullptr,
+     nullptr,          nullptr,        nullptr,
+     nullptr,          nullptr,        layerMaxNum_mloopcol},
     /* 7: CD_ORIGINDEX */
     {sizeof(int), "", 0, nullptr, nullptr, nullptr, nullptr, nullptr, layerDefault_origindex},
     /* 8: CD_NORMAL */
@@ -1699,6 +1717,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      nullptr,
      nullptr,
      nullptr,
+     nullptr,
      layerCopyValue_normal},
     /* 9: CD_FACEMAP */
     {sizeof(int), "", 0, nullptr, nullptr, nullptr, nullptr, nullptr, layerDefault_fmap, nullptr},
@@ -1712,13 +1731,14 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      layerInterp_propFloat,
      nullptr,
      nullptr,
+     nullptr,
      layerValidate_propFloat},
     /* 11: CD_PROP_INT32 */
     {sizeof(MIntProperty),
      "MIntProperty",
      1,
      N_("Int"),
-     layerCopy_propInt,
+     nullptr,
      nullptr,
      layerInterp_propInt,
      nullptr},
@@ -1757,6 +1777,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      layerInterp_mloopuv,
      nullptr,
      nullptr,
+     nullptr,
      layerValidate_mloopuv,
      layerEqual_mloopuv,
      layerMultiply_mloopuv,
@@ -1779,6 +1800,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      nullptr,
      layerDefault_mloopcol,
      nullptr,
+     nullptr,
      layerEqual_mloopcol,
      layerMultiply_mloopcol,
      layerInitMinMax_mloopcol,
@@ -1801,6 +1823,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      nullptr,
      layerSwap_mdisps,
      nullptr,
+     layerConstruct_mdisps,
      nullptr,
      nullptr,
      nullptr,
@@ -1870,6 +1893,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      nullptr,
      nullptr,
      nullptr,
+     nullptr,
      layerEqual_mloop_origspace,
      layerMultiply_mloop_origspace,
      layerInitMinMax_mloop_origspace,
@@ -1887,6 +1911,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      nullptr,
      layerDefault_mloopcol,
      nullptr,
+     nullptr,
      layerEqual_mloopcol,
      layerMultiply_mloopcol,
      layerInitMinMax_mloopcol,
@@ -1914,7 +1939,8 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      layerFree_grid_paint_mask,
      nullptr,
      nullptr,
-     nullptr},
+     nullptr,
+     layerConstruct_grid_paint_mask},
     /* 36: CD_MVERT_SKIN */
     {sizeof(MVertSkin),
      "MVertSkin",
@@ -1972,6 +1998,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      nullptr,
      layerDefault_propcol,
      nullptr,
+     nullptr,
      layerEqual_propcol,
      layerMultiply_propcol,
      layerInitMinMax_propcol,
@@ -1992,6 +2019,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      layerInterp_propfloat3,
      nullptr,
      nullptr,
+     nullptr,
      layerValidate_propfloat3,
      nullptr,
      layerMultiply_propfloat3,
@@ -2007,6 +2035,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
      layerInterp_propfloat2,
      nullptr,
      nullptr,
+     nullptr,
      layerValidate_propfloat2,
      nullptr,
      layerMultiply_propfloat2,
@@ -2765,48 +2794,60 @@ static CustomDataLayer *customData_add_layer__internal(CustomData *data,
   const LayerTypeInfo *typeInfo = layerType_getInfo(type);
   int flag = 0;
 
-  /* Passing a layer-data to copy from with an alloctype that won't copy is
-   * most likely a bug */
-  BLI_assert(!layerdata || ELEM(alloctype, CD_ASSIGN, CD_DUPLICATE, CD_REFERENCE));
-
   if (!typeInfo->defaultname && CustomData_has_layer(data, type)) {
     return &data->layers[CustomData_get_layer_index(data, type)];
   }
 
   void *newlayerdata = nullptr;
-  if (ELEM(alloctype, CD_ASSIGN, CD_REFERENCE)) {
-    newlayerdata = layerdata;
-  }
-  else if (totelem > 0 && typeInfo->size > 0) {
-    if (alloctype == CD_DUPLICATE && layerdata) {
-      newlayerdata = MEM_malloc_arrayN((size_t)totelem, typeInfo->size, layerType_getName(type));
-    }
-    else {
-      newlayerdata = MEM_calloc_arrayN((size_t)totelem, typeInfo->size, layerType_getName(type));
-    }
-
-    if (!newlayerdata) {
-      return nullptr;
-    }
-  }
-
-  if (alloctype == CD_DUPLICATE && layerdata) {
-    if (totelem > 0) {
-      if (typeInfo->copy) {
-        typeInfo->copy(layerdata, newlayerdata, totelem);
+  switch (alloctype) {
+    case CD_SET_DEFAULT:
+      if (totelem > 0) {
+        if (typeInfo->set_default_value) {
+          newlayerdata = MEM_malloc_arrayN(totelem, typeInfo->size, layerType_getName(type));
+          typeInfo->set_default_value(newlayerdata, totelem);
+        }
+        else {
+          newlayerdata = MEM_calloc_arrayN(totelem, typeInfo->size, layerType_getName(type));
+        }
+      }
+      break;
+    case CD_CONSTRUCT:
+      if (totelem > 0) {
+        newlayerdata = MEM_malloc_arrayN(totelem, typeInfo->size, layerType_getName(type));
+        if (typeInfo->construct) {
+          typeInfo->construct(newlayerdata, totelem);
+        }
+      }
+      break;
+    case CD_ASSIGN:
+      if (totelem > 0) {
+        BLI_assert(layerdata != nullptr);
+        newlayerdata = layerdata;
       }
       else {
-        memcpy(newlayerdata, layerdata, (size_t)totelem * typeInfo->size);
+        MEM_SAFE_FREE(layerdata);
       }
-    }
-  }
-  else if (alloctype == CD_DEFAULT) {
-    if (typeInfo->set_default) {
-      typeInfo->set_default(newlayerdata, totelem);
-    }
-  }
-  else if (alloctype == CD_REFERENCE) {
-    flag |= CD_FLAG_NOFREE;
+      break;
+    case CD_REFERENCE:
+      if (totelem > 0) {
+        BLI_assert(layerdata != nullptr);
+        newlayerdata = layerdata;
+        flag |= CD_FLAG_NOFREE;
+      }
+      break;
+    case CD_DUPLICATE:
+      if (totelem > 0) {
+        newlayerdata = MEM_malloc_arrayN(totelem, typeInfo->size, layerType_getName(type));
+        if (typeInfo->copy) {
+          typeInfo->copy(layerdata, newlayerdata, totelem);
+        }
+        else {
+          BLI_assert(layerdata != nullptr);
+          BLI_assert(newlayerdata != nullptr);
+          memcpy(newlayerdata, layerdata, totelem * typeInfo->size);
+        }
+      }
+      break;
   }
 
   int index = data->totlayer;
@@ -3850,8 +3891,8 @@ static void CustomData_bmesh_set_default_n(CustomData *data, void **block, const
   int offset = data->layers[n].offset;
   const LayerTypeInfo *typeInfo = layerType_getInfo(data->layers[n].type);
 
-  if (typeInfo->set_default) {
-    typeInfo->set_default(POINTER_OFFSET(*block, offset), 1);
+  if (typeInfo->set_default_value) {
+    typeInfo->set_default_value(POINTER_OFFSET(*block, offset), 1);
   }
   else {
     memset(POINTER_OFFSET(*block, offset), 0, typeInfo->size);
@@ -4558,8 +4599,8 @@ static bool CustomData_layer_ensure_data_exists(CustomDataLayer *layer, size_t c
     case CD_MLOOPUV:   /* See T90620. */
       layer->data = MEM_calloc_arrayN(count, typeInfo->size, layerType_getName(layer->type));
       BLI_assert(layer->data);
-      if (typeInfo->set_default) {
-        typeInfo->set_default(layer->data, count);
+      if (typeInfo->set_default_value) {
+        typeInfo->set_default_value(layer->data, count);
       }
       return true;
       break;
diff --git a/source/blender/blenkernel/intern/data_transfer.c b/source/blender/blenkernel/intern/data_transfer.c
index be686635d3e..02b5175f65f 100644
--- a/source/blender/blenkernel/intern/data_transfer.c
+++ b/source/blender/blenkernel/intern/data_transfer.c
@@ -280,7 +280,8 @@ static void data_transfer_dtdata_type_preprocess(Mesh *me_src,
     loop_nors_dst = CustomData_get_layer(ldata_dst, CD_NORMAL);
     const bool do_loop_nors_dst = (loop_nors_dst == NULL);
     if (do_loop_nors_dst) {
-      loop_nors_dst = CustomData_add_layer(ldata_dst, CD_NORMAL, CD_CALLOC, NULL, num_loops_dst);
+      loop_nors_dst = CustomData_add_layer(
+          ldata_dst, CD_NORMAL, CD_SET_DEFAULT, NULL, num_loops_dst);
       CustomData_set_layer_flag(ldata_dst, CD_NORMAL, CD_FLAG_TEMPORARY);
     }
     if (dirty_nors_dst || do_loop_nors_dst) {
@@ -333,7 +334,7 @@ static void data_transfer_dtdata_type_postprocess(Object *UNUSED(ob_src),
 
     if (!custom_nors_dst) {
       custom_nors_dst = CustomData_add_layer(
-          ldata_dst, CD_CUSTOMLOOPNORMAL, CD_CALLOC, NULL, num_loops_dst);
+          ldata_dst, CD_CUSTOMLOOPNORMAL, CD_SET_DEFAULT, NULL, num_loops_dst);
     }
 
     /* Note loop_nors_dst contains our custom normals as transferred from source... */
@@ -561,7 +562,7 @@ static bool data_transfer_layersmapping_cdlayers_multisrc_to_dst(ListBase *r_map
         if (use_create) {
           /* Create as much data layers as necessary! */
           for (; idx_dst < idx_src; idx_dst++) {
-            CustomData_add_layer(cd_dst, cddata_type, CD_CALLOC, NULL, num_elem_dst);
+            CustomData_add_layer(cd_dst, cddata_type, CD_SET_DEFAULT, NULL, num_elem_dst);
           }
         }
         else {
@@ -622,7 +623,8 @@ static bool data_transfer_layersmapping_cdlayers_multisrc_to_dst(ListBase *r_map
 
         if ((idx_dst = CustomData_get_named_layer(cd_dst, cddata_type, name)) == -1) {
           if (use_create) {
-            CustomData_add_layer_named(cd_dst, cddata_type, CD_CALLOC, NULL, num_elem_dst, name);
+            CustomData_add_layer_named(
+                cd_dst, cddata_type, CD_SET_DEFAULT, NULL, num_elem_dst, name);
             idx_dst = CustomData_get_named_layer(cd_dst, cddata_type, name);
           }
           else {
@@ -710,7 +712,7 @@ static bool data_transfer_layersmapping_cdlayers(ListBase *r_map,
       if (!use_create) {
         return true;
       }
-      data_dst = CustomData_add_layer(cd_dst, cddata_type, CD_CALLOC, NULL, num_elem_dst);
+      data_dst = CustomData_add_layer(cd_dst, cddata_type, CD_SET_DEFAULT, NULL, num_elem_dst);
     }
     else if (use_dupref_dst && r_map) {
       /* If dest is a evaluated mesh (from modifier),
@@ -763,7 +765,7 @@ static bool data_transfer_layersmapping_cdlayers(ListBase *r_map,
         if (!use_create) {
           return true;
         }
-        data_dst = CustomData_add_layer(cd_dst, cddata_type, CD_CALLOC, NULL, num_elem_dst);
+        data_dst = CustomData_add_layer(cd_dst, cddata_type, CD_SET_DEFAULT, NULL, num_elem_dst);
       }
       else {
         /* If dest is a evaluated mesh (from modifier),
@@ -786,7 +788,7 @@ static bool data_transfer_layersmapping_cdlayers(ListBase *r_map,
         }
         /* Create as much data layers as necessary! */
         for (; num <= idx_dst; num++) {
-          CustomData_add_layer(cd_dst, cddata_type, CD_CALLOC, NULL, num_elem_dst);
+          CustomData_add_layer(cd_dst, cddata_type, CD_SET_DEFAULT, NULL, num_elem_dst);
         }
       }
       /* If dest is a evaluated mesh (from modifier),
@@ -805,7 +807,7 @@ static bool data_transfer_layersmapping_cdlayers(ListBase *r_map,
         if (!use_create) {
           return true;
         }
-        CustomData_add_layer_named(cd_dst, cddata_type, CD_CALLOC, NULL, num_elem_dst, name);
+        CustomData_add_layer_named(cd_dst, cddata_type, CD_SET_DEFAULT, NULL, num_elem_dst, name);
         idx_dst = CustomData_get_named_layer(cd_dst, cddata_type, name);
       }
       /* If dest is a evaluated mesh (from modifier),
diff --git a/source/blender/blenkernel/intern/deform.c b/source/blender/blenkernel/intern/deform.c
index ebe06fa85eb..d904744995d 100644
--- a/source/blender/blenkernel/intern/deform.c
+++ b/source/blender/blenkernel/intern/deform.c
@@ -1243,7 +1243,8 @@ static bool data_transfer_layersmapping_vgroups_multisrc_to_dst(ListBase *r_map,
         /* At this stage, we **need** a valid CD_MDEFORMVERT layer on dest!
          * Again, use_create is not relevant in this case */
         if (!data_dst) {
-          data_dst = CustomData_add_layer(cd_dst, CD_MDEFORMVERT, CD_CALLOC, NULL, num_elem_dst);
+          data_dst = CustomData_add_layer(
+              cd_dst, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, num_elem_dst);
         }
 
         while (idx_src--) {
@@ -1303,7 +1304,8 @@ static bool data_transfer_layersmapping_vgroups_multisrc_to_dst(ListBase *r_map,
           /* At this stage, we **need** a valid CD_MDEFORMVERT layer on dest!
            * use_create is not relevant in this case */
           if (!data_dst) {
-            data_dst = CustomData_add_layer(cd_dst, CD_MDEFORMVERT, CD_CALLOC, NULL, num_elem_dst);
+            data_dst = CustomData_add_layer(
+                cd_dst, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, num_elem_dst);
           }
 
           data_transfer_layersmapping_add_item(r_map,
@@ -1442,7 +1444,8 @@ bool data_transfer_layersmapping_vgroups(ListBase *r_map,
       /* At this stage, we **need** a valid CD_MDEFORMVERT layer on dest!
        * use_create is not relevant in this case */
       if (!data_dst) {
-        data_dst = CustomData_add_layer(cd_dst, CD_MDEFORMVERT, CD_CALLOC, NULL, num_elem_dst);
+        data_dst = CustomData_add_layer(
+            cd_dst, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, num_elem_dst);
       }
 
       data_transfer_layersmapping_add_item(r_map,
diff --git a/source/blender/blenkernel/intern/dynamicpaint.c b/source/blender/blenkernel/intern/dynamicpaint.c
index 423e76fce8c..8a41b2294f5 100644
--- a/source/blender/blenkernel/intern/dynamicpaint.c
+++ b/source/blender/blenkernel/intern/dynamicpaint.c
@@ -1944,7 +1944,7 @@ static Mesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd, Object *
             if (!mloopcol && dynamicPaint_outputLayerExists(surface, ob, 0)) {
               mloopcol = CustomData_add_layer_named(&result->ldata,
                                                     CD_PROP_BYTE_COLOR,
-                                                    CD_CALLOC,
+                                                    CD_SET_DEFAULT,
                                                     NULL,
                                                     totloop,
                                                     surface->output_name);
@@ -1957,7 +1957,7 @@ static Mesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd, Object *
             if (!mloopcol_wet && dynamicPaint_outputLayerExists(surface, ob, 1)) {
               mloopcol_wet = CustomData_add_layer_named(&result->ldata,
                                                         CD_PROP_BYTE_COLOR,
-                                                        CD_CALLOC,
+                                                        CD_SET_DEFAULT,
                                                         NULL,
                                                         totloop,
                                                         surface->output_name2);
@@ -1988,7 +1988,7 @@ static Mesh *dynamicPaint_Modifier_apply(DynamicPaintModifierData *pmd, Object *
             /* apply weights into a vertex group, if doesn't exists add a new layer */
             if (defgrp_index != -1 && !dvert && (surface->output_name[0] != '\0')) {
               dvert = CustomData_add_layer(
-                  &result->vdata, CD_MDEFORMVERT, CD_CALLOC, NULL, sData->total_points);
+                  &result->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, sData->total_points);
               /* Make the dvert layer easily accessible from the mesh data. */
               result->dvert = dvert;
             }
diff --git a/source/blender/blenkernel/intern/editmesh_tangent.c b/source/blender/blenkernel/intern/editmesh_tangent.c
index 0a3107eee24..ec608f79e66 100644
--- a/source/blender/blenkernel/intern/editmesh_tangent.c
+++ b/source/blender/blenkernel/intern/editmesh_tangent.c
@@ -304,7 +304,7 @@ void BKE_editmesh_loop_tangent_calc(BMEditMesh *em,
     if ((tangent_mask & DM_TANGENT_MASK_ORCO) &&
         CustomData_get_named_layer_index(loopdata_out, CD_TANGENT, "") == -1) {
       CustomData_add_layer_named(
-          loopdata_out, CD_TANGENT, CD_CALLOC, NULL, (int)loopdata_out_len, "");
+          loopdata_out, CD_TANGENT, CD_SET_DEFAULT, NULL, (int)loopdata_out_len, "");
     }
     if (calc_act && act_uv_name[0]) {
       BKE_mesh_add_loop_tangent_named_layer_for_uv(
diff --git a/source/blender/blenkernel/intern/geometry_component_curve.cc b/source/blender/blenkernel/intern/geometry_component_curve.cc
index 22f105af0f1..56a7e38b2fc 100644
--- a/source/blender/blenkernel/intern/geometry_component_curve.cc
+++ b/source/blender/blenkernel/intern/geometry_component_curve.cc
@@ -547,7 +547,8 @@ static GVArray varray_from_initializer(const AttributeInit &initializer,
                                        const Span<SplinePtr> splines)
 {
   switch (initializer.type) {
-    case AttributeInit::Type::Default:
+    case AttributeInit::Type::Construct:
+    case AttributeInit::Type::DefaultValue:
       /* This function shouldn't be called in this case, since there
        * is no need to copy anything to the new custom data array. */
       BLI_assert_unreachable();
@@ -560,7 +561,7 @@ static GVArray varray_from_initializer(const AttributeInit &initializer,
         total_num += spline->size();
       }
       return GVArray::ForSpan(GSpan(*bke::custom_data_type_to_cpp_type(data_type),
-                                    static_cast<const AttributeInitMove &>(initializer).data,
+                                    static_cast<const AttributeInitMoveArray &>(initializer).data,
                                     total_num));
   }
   BLI_assert_unreachable();
@@ -580,7 +581,7 @@ static bool create_point_attribute(CurveEval *curve,
 
   /* First check the one case that allows us to avoid copying the input data. */
   if (splines.size() == 1 && initializer.type == AttributeInit::Type::MoveArray) {
-    void *source_data = static_cast<const AttributeInitMove &>(initializer).data;
+    void *source_data = static_cast<const AttributeInitMoveArray &>(initializer).data;
     if (!splines.first()->attributes.create_by_move(attribute_id, data_type, source_data)) {
       MEM_freeN(source_data);
       return false;
@@ -600,7 +601,7 @@ static bool create_point_attribute(CurveEval *curve,
   }
 
   /* With a default initializer type, we can keep the values at their initial values. */
-  if (initializer.type == AttributeInit::Type::Default) {
+  if (ELEM(initializer.type, AttributeInit::Type::DefaultValue, AttributeInit::Type::Construct)) {
     return true;
   }
 
@@ -616,7 +617,7 @@ static bool create_point_attribute(CurveEval *curve,
   write_attribute.finish();
 
   if (initializer.type == AttributeInit::Type::MoveArray) {
-    MEM_freeN(static_cast<const AttributeInitMove &>(initializer).data);
+    MEM_freeN(static_cast<const AttributeInitMoveArray &>(initializer).data);
   }
 
   return true;
diff --git a/source/blender/blenkernel/intern/mball_tessellate.c b/source/blender/blenkernel/intern/mball_tessellate.c
index 61f5a5f315f..bfa11b74782 100644
--- a/source/blender/blenkernel/intern/mball_tessellate.c
+++ b/source/blender/blenkernel/intern/mball_tessellate.c
@@ -1444,7 +1444,7 @@ Mesh *BKE_mball_polygonize(Depsgraph *depsgraph, Scene *scene, Object *ob)
   Mesh *mesh = (Mesh *)BKE_id_new_nomain(ID_ME, ((ID *)ob->data)->name + 2);
 
   mesh->totvert = (int)process.curvertex;
-  MVert *mvert = CustomData_add_layer(&mesh->vdata, CD_MVERT, CD_DEFAULT, NULL, mesh->totvert);
+  MVert *mvert = CustomData_add_layer(&mesh->vdata, CD_MVERT, CD_CONSTRUCT, NULL, mesh->totvert);
   for (int i = 0; i < mesh->totvert; i++) {
     copy_v3_v3(mvert[i].co, process.co[i]);
     mvert->bweight = 0;
@@ -1453,8 +1453,9 @@ Mesh *BKE_mball_polygonize(Depsgraph *depsgraph, Scene *scene, Object *ob)
   MEM_freeN(process.co);
 
   mesh->totpoly = (int)process.curindex;
-  MPoly *mpoly = CustomData_add_layer(&mesh->pdata, CD_MPOLY, CD_DEFAULT, NULL, mesh->totpoly);
-  MLoop *mloop = CustomData_add_layer(&mesh->ldata, CD_MLOOP, CD_DEFAULT, NULL, mesh->totpoly * 4);
+  MPoly *mpoly = CustomData_add_layer(&mesh->pdata, CD_MPOLY, CD_CONSTRUCT, NULL, mesh->totpoly);
+  MLoop *mloop = CustomData_add_layer(
+      &mesh->ldata, CD_MLOOP, CD_CONSTRUCT, NULL, mesh->totpoly * 4);
 
   int loop_offset = 0;
   for (int i = 0; i < mesh->totpoly; i++) {
diff --git a/source/blender/blenkernel/intern/mesh.cc b/source/blender/blenkernel/intern/mesh.cc
index 6f91ce2a4e9..b44a956eec4 100644
--- a/source/blender/blenkernel/intern/mesh.cc
+++ b/source/blender/blenkernel/intern/mesh.cc
@@ -826,7 +826,7 @@ void BKE_mesh_ensure_skin_customdata(Mesh *me)
   else {
     if (!CustomData_has_layer(&me->vdata, CD_MVERT_SKIN)) {
       vs = (MVertSkin *)CustomData_add_layer(
-          &me->vdata, CD_MVERT_SKIN, CD_DEFAULT, nullptr, me->totvert);
+          &me->vdata, CD_MVERT_SKIN, CD_SET_DEFAULT, nullptr, me->totvert);
 
       /* Mark an arbitrary vertex as root */
       if (vs) {
@@ -848,7 +848,7 @@ bool BKE_mesh_ensure_facemap_customdata(struct Mesh *me)
   }
   else {
     if (!CustomData_has_layer(&me->pdata, CD_FACEMAP)) {
-      CustomData_add_layer(&me->pdata, CD_FACEMAP, CD_DEFAULT, nullptr, me->totpoly);
+      CustomData_add_layer(&me->pdata, CD_FACEMAP, CD_SET_DEFAULT, nullptr, me->totpoly);
       changed = true;
     }
   }
@@ -991,20 +991,20 @@ Mesh *BKE_mesh_add(Main *bmain, const char *name)
 static void mesh_ensure_cdlayers_primary(Mesh *mesh, bool do_tessface)
 {
   if (!CustomData_get_layer(&mesh->vdata, CD_MVERT)) {
-    CustomData_add_layer(&mesh->vdata, CD_MVERT, CD_CALLOC, nullptr, mesh->totvert);
+    CustomData_add_layer(&mesh->vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, mesh->totvert);
   }
   if (!CustomData_get_layer(&mesh->edata, CD_MEDGE)) {
-    CustomData_add_layer(&mesh->edata, CD_MEDGE, CD_CALLOC, nullptr, mesh->totedge);
+    CustomData_add_layer(&mesh->edata, CD_MEDGE, CD_SET_DEFAULT, nullptr, mesh->totedge);
   }
   if (!CustomData_get_layer(&mesh->ldata, CD_MLOOP)) {
-    CustomData_add_layer(&mesh->ldata, CD_MLOOP, CD_CALLOC, nullptr, mesh->totloop);
+    CustomData_add_layer(&mesh->ldata, CD_MLOOP, CD_SET_DEFAULT, nullptr, mesh->totloop);
   }
   if (!CustomData_get_layer(&mesh->pdata, CD_MPOLY)) {
-    CustomData_add_layer(&mesh->pdata, CD_MPOLY, CD_CALLOC, nullptr, mesh->totpoly);
+    CustomData_add_layer(&mesh->pdata, CD_MPOLY, CD_SET_DEFAULT, nullptr, mesh->totpoly);
   }
 
   if (do_tessface && !CustomData_get_layer(&mesh->fdata, CD_MFACE)) {
-    CustomData_add_layer(&mesh->fdata, CD_MFACE, CD_CALLOC, nullptr, mesh->totface);
+    CustomData_add_layer(&mesh->fdata, CD_MFACE, CD_SET_DEFAULT, nullptr, mesh->totface);
   }
 }
 
@@ -1101,12 +1101,12 @@ Mesh *BKE_mesh_new_nomain_from_template_ex(const Mesh *me_src,
   me_dst->cd_flag = me_src->cd_flag;
   BKE_mesh_copy_parameters_for_eval(me_dst, me_src);
 
-  CustomData_copy(&me_src->vdata, &me_dst->vdata, mask.vmask, CD_CALLOC, verts_len);
-  CustomData_copy(&me_src->edata, &me_dst->edata, mask.emask, CD_CALLOC, edges_len);
-  CustomData_copy(&me_src->ldata, &me_dst->ldata, mask.lmask, CD_CALLOC, loops_len);
-  CustomData_copy(&me_src->pdata, &me_dst->pdata, mask.pmask, CD_CALLOC, polys_len);
+  CustomData_copy(&me_src->vdata, &me_dst->vdata, mask.vmask, CD_SET_DEFAULT, verts_len);
+  CustomData_copy(&me_src->edata, &me_dst->edata, mask.emask, CD_SET_DEFAULT, edges_len);
+  CustomData_copy(&me_src->ldata, &me_dst->ldata, mask.lmask, CD_SET_DEFAULT, loops_len);
+  CustomData_copy(&me_src->pdata, &me_dst->pdata, mask.pmask, CD_SET_DEFAULT, polys_len);
   if (do_tessface) {
-    CustomData_copy(&me_src->fdata, &me_dst->fdata, mask.fmask, CD_CALLOC, tessface_len);
+    CustomData_copy(&me_src->fdata, &me_dst->fdata, mask.fmask, CD_SET_DEFAULT, tessface_len);
   }
   else {
     mesh_tessface_clear_intern(me_dst, false);
@@ -1207,7 +1207,7 @@ static void ensure_orig_index_layer(CustomData &data, const int size)
   if (CustomData_has_layer(&data, CD_ORIGINDEX)) {
     return;
   }
-  int *indices = (int *)CustomData_add_layer(&data, CD_ORIGINDEX, CD_DEFAULT, nullptr, size);
+  int *indices = (int *)CustomData_add_layer(&data, CD_ORIGINDEX, CD_SET_DEFAULT, nullptr, size);
   range_vn_i(indices, size, 0);
 }
 
@@ -1893,7 +1893,7 @@ static float (*ensure_corner_normal_layer(Mesh &mesh))[3]
   }
   else {
     r_loopnors = (float(*)[3])CustomData_add_layer(
-        &mesh.ldata, CD_NORMAL, CD_CALLOC, nullptr, mesh.totloop);
+        &mesh.ldata, CD_NORMAL, CD_SET_DEFAULT, nullptr, mesh.totloop);
     CustomData_set_layer_flag(&mesh.ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
   }
   return r_loopnors;
diff --git a/source/blender/blenkernel/intern/mesh_boolean_convert.cc b/source/blender/blenkernel/intern/mesh_boolean_convert.cc
index 99cfcf01ba9..fb4a9248d8d 100644
--- a/source/blender/blenkernel/intern/mesh_boolean_convert.cc
+++ b/source/blender/blenkernel/intern/mesh_boolean_convert.cc
@@ -669,15 +669,15 @@ static void merge_vertex_loop_poly_customdata_layers(Mesh *target, MeshesToIMesh
     const Mesh *me = mim.meshes[mesh_index];
     if (me->totvert) {
       CustomData_merge(
-          &me->vdata, &target->vdata, CD_MASK_MESH.vmask, CD_DEFAULT, target->totvert);
+          &me->vdata, &target->vdata, CD_MASK_MESH.vmask, CD_SET_DEFAULT, target->totvert);
     }
     if (me->totloop) {
       CustomData_merge(
-          &me->ldata, &target->ldata, CD_MASK_MESH.lmask, CD_DEFAULT, target->totloop);
+          &me->ldata, &target->ldata, CD_MASK_MESH.lmask, CD_SET_DEFAULT, target->totloop);
     }
     if (me->totpoly) {
       CustomData_merge(
-          &me->pdata, &target->pdata, CD_MASK_MESH.pmask, CD_DEFAULT, target->totpoly);
+          &me->pdata, &target->pdata, CD_MASK_MESH.pmask, CD_SET_DEFAULT, target->totpoly);
     }
   }
 }
@@ -688,7 +688,7 @@ static void merge_edge_customdata_layers(Mesh *target, MeshesToIMeshInfo &mim)
     const Mesh *me = mim.meshes[mesh_index];
     if (me->totedge) {
       CustomData_merge(
-          &me->edata, &target->edata, CD_MASK_MESH.emask, CD_DEFAULT, target->totedge);
+          &me->edata, &target->edata, CD_MASK_MESH.emask, CD_SET_DEFAULT, target->totedge);
     }
   }
 }
diff --git a/source/blender/blenkernel/intern/mesh_convert.cc b/source/blender/blenkernel/intern/mesh_convert.cc
index 0f05a3635c4..393d54bb03e 100644
--- a/source/blender/blenkernel/intern/mesh_convert.cc
+++ b/source/blender/blenkernel/intern/mesh_convert.cc
@@ -199,7 +199,7 @@ static Mesh *mesh_nurbs_displist_to_mesh(const Curve *cu, const ListBase *dispba
   SpanAttributeWriter<int> material_indices = attributes.lookup_or_add_for_write_only_span<int>(
       "material_index", ATTR_DOMAIN_FACE);
   MLoopUV *mloopuv = static_cast<MLoopUV *>(CustomData_add_layer_named(
-      &mesh->ldata, CD_MLOOPUV, CD_CALLOC, nullptr, mesh->totloop, "UVMap"));
+      &mesh->ldata, CD_MLOOPUV, CD_SET_DEFAULT, nullptr, mesh->totloop, "UVMap"));
 
   /* verts and faces */
   vertcount = 0;
@@ -682,7 +682,8 @@ void BKE_mesh_from_pointcloud(const PointCloud *pointcloud, Mesh *me)
       &pointcloud->pdata, &me->vdata, CD_MASK_PROP_ALL, CD_DUPLICATE, pointcloud->totpoint);
 
   /* Convert the Position attribute to a mesh vertex. */
-  me->mvert = (MVert *)CustomData_add_layer(&me->vdata, CD_MVERT, CD_CALLOC, nullptr, me->totvert);
+  me->mvert = (MVert *)CustomData_add_layer(
+      &me->vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, me->totvert);
   CustomData_update_typemap(&me->vdata);
 
   const int layer_idx = CustomData_get_named_layer_index(
diff --git a/source/blender/blenkernel/intern/mesh_legacy_convert.cc b/source/blender/blenkernel/intern/mesh_legacy_convert.cc
index 33cdcb6f6ad..2fc984997b8 100644
--- a/source/blender/blenkernel/intern/mesh_legacy_convert.cc
+++ b/source/blender/blenkernel/intern/mesh_legacy_convert.cc
@@ -137,19 +137,19 @@ static void CustomData_to_bmeshpoly(CustomData *fdata, CustomData *ldata, int to
   for (int i = 0; i < fdata->totlayer; i++) {
     if (fdata->layers[i].type == CD_MTFACE) {
       CustomData_add_layer_named(
-          ldata, CD_MLOOPUV, CD_CALLOC, nullptr, totloop, fdata->layers[i].name);
+          ldata, CD_MLOOPUV, CD_SET_DEFAULT, nullptr, totloop, fdata->layers[i].name);
     }
     else if (fdata->layers[i].type == CD_MCOL) {
       CustomData_add_layer_named(
-          ldata, CD_PROP_BYTE_COLOR, CD_CALLOC, nullptr, totloop, fdata->layers[i].name);
+          ldata, CD_PROP_BYTE_COLOR, CD_SET_DEFAULT, nullptr, totloop, fdata->layers[i].name);
     }
     else if (fdata->layers[i].type == CD_MDISPS) {
       CustomData_add_layer_named(
-          ldata, CD_MDISPS, CD_CALLOC, nullptr, totloop, fdata->layers[i].name);
+          ldata, CD_MDISPS, CD_SET_DEFAULT, nullptr, totloop, fdata->layers[i].name);
     }
     else if (fdata->layers[i].type == CD_TESSLOOPNORMAL) {
       CustomData_add_layer_named(
-          ldata, CD_NORMAL, CD_CALLOC, nullptr, totloop, fdata->layers[i].name);
+          ldata, CD_NORMAL, CD_SET_DEFAULT, nullptr, totloop, fdata->layers[i].name);
     }
   }
 }
@@ -849,26 +849,27 @@ void BKE_mesh_add_mface_layers(CustomData *fdata, CustomData *ldata, int total)
   for (int i = 0; i < ldata->totlayer; i++) {
     if (ldata->layers[i].type == CD_MLOOPUV) {
       CustomData_add_layer_named(
-          fdata, CD_MTFACE, CD_CALLOC, nullptr, total, ldata->layers[i].name);
+          fdata, CD_MTFACE, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name);
     }
     if (ldata->layers[i].type == CD_PROP_BYTE_COLOR) {
-      CustomData_add_layer_named(fdata, CD_MCOL, CD_CALLOC, nullptr, total, ldata->layers[i].name);
+      CustomData_add_layer_named(
+          fdata, CD_MCOL, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name);
     }
     else if (ldata->layers[i].type == CD_PREVIEW_MLOOPCOL) {
       CustomData_add_layer_named(
-          fdata, CD_PREVIEW_MCOL, CD_CALLOC, nullptr, total, ldata->layers[i].name);
+          fdata, CD_PREVIEW_MCOL, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name);
     }
     else if (ldata->layers[i].type == CD_ORIGSPACE_MLOOP) {
       CustomData_add_layer_named(
-          fdata, CD_ORIGSPACE, CD_CALLOC, nullptr, total, ldata->layers[i].name);
+          fdata, CD_ORIGSPACE, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name);
     }
     else if (ldata->layers[i].type == CD_NORMAL) {
       CustomData_add_layer_named(
-          fdata, CD_TESSLOOPNORMAL, CD_CALLOC, nullptr, total, ldata->layers[i].name);
+          fdata, CD_TESSLOOPNORMAL, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name);
     }
     else if (ldata->layers[i].type == CD_TANGENT) {
       CustomData_add_layer_named(
-          fdata, CD_TANGENT, CD_CALLOC, nullptr, total, ldata->layers[i].name);
+          fdata, CD_TANGENT, CD_SET_DEFAULT, nullptr, total, ldata->layers[i].name);
     }
   }
 
diff --git a/source/blender/blenkernel/intern/mesh_normals.cc b/source/blender/blenkernel/intern/mesh_normals.cc
index 2366b7526a1..f90a2e1b887 100644
--- a/source/blender/blenkernel/intern/mesh_normals.cc
+++ b/source/blender/blenkernel/intern/mesh_normals.cc
@@ -2054,7 +2054,7 @@ static void mesh_set_custom_normals(Mesh *mesh, float (*r_custom_nors)[3], const
   }
   else {
     clnors = (short(*)[2])CustomData_add_layer(
-        &mesh->ldata, CD_CUSTOMLOOPNORMAL, CD_CALLOC, nullptr, numloops);
+        &mesh->ldata, CD_CUSTOMLOOPNORMAL, CD_SET_DEFAULT, nullptr, numloops);
   }
 
   mesh_normals_loop_custom_set(mesh->mvert,
diff --git a/source/blender/blenkernel/intern/mesh_remap.c b/source/blender/blenkernel/intern/mesh_remap.c
index 5313cc39646..4c6ee0ae3ee 100644
--- a/source/blender/blenkernel/intern/mesh_remap.c
+++ b/source/blender/blenkernel/intern/mesh_remap.c
@@ -1352,7 +1352,7 @@ void BKE_mesh_remap_calc_loops_from_mesh(const int mode,
         const bool do_loop_nors_dst = (loop_nors_dst == NULL);
         if (!loop_nors_dst) {
           loop_nors_dst = CustomData_add_layer(
-              ldata_dst, CD_NORMAL, CD_CALLOC, NULL, numloops_dst);
+              ldata_dst, CD_NORMAL, CD_SET_DEFAULT, NULL, numloops_dst);
           CustomData_set_layer_flag(ldata_dst, CD_NORMAL, CD_FLAG_TEMPORARY);
         }
         if (dirty_nors_dst || do_loop_nors_dst) {
diff --git a/source/blender/blenkernel/intern/mesh_remesh_voxel.cc b/source/blender/blenkernel/intern/mesh_remesh_voxel.cc
index 423f76407a0..5a4fd0d7d96 100644
--- a/source/blender/blenkernel/intern/mesh_remesh_voxel.cc
+++ b/source/blender/blenkernel/intern/mesh_remesh_voxel.cc
@@ -291,7 +291,7 @@ void BKE_mesh_remesh_reproject_paint_mask(Mesh *target, const Mesh *source)
   }
   else {
     target_mask = (float *)CustomData_add_layer(
-        &target->vdata, CD_PAINT_MASK, CD_CALLOC, nullptr, target->totvert);
+        &target->vdata, CD_PAINT_MASK, CD_CONSTRUCT, nullptr, target->totvert);
   }
 
   for (int i = 0; i < target->totvert; i++) {
@@ -325,7 +325,7 @@ void BKE_remesh_reproject_sculpt_face_sets(Mesh *target, const Mesh *source)
   }
   else {
     target_face_sets = (int *)CustomData_add_layer(
-        &target->pdata, CD_SCULPT_FACE_SETS, CD_CALLOC, nullptr, target->totpoly);
+        &target->pdata, CD_SCULPT_FACE_SETS, CD_CONSTRUCT, nullptr, target->totpoly);
   }
 
   const MLoopTri *looptri = BKE_mesh_runtime_looptri_ensure(source);
@@ -376,7 +376,7 @@ void BKE_remesh_reproject_vertex_paint(Mesh *target, const Mesh *source)
       int elem_num = domain == ATTR_DOMAIN_POINT ? target->totvert : target->totloop;
 
       CustomData_add_layer_named(
-          target_cdata, layer->type, CD_CALLOC, nullptr, elem_num, layer->name);
+          target_cdata, layer->type, CD_SET_DEFAULT, nullptr, elem_num, layer->name);
       layer_i = CustomData_get_named_layer_index(target_cdata, layer->type, layer->name);
     }
 
diff --git a/source/blender/blenkernel/intern/mesh_tangent.c b/source/blender/blenkernel/intern/mesh_tangent.c
index 1772419e1f3..497f9ff3cbd 100644
--- a/source/blender/blenkernel/intern/mesh_tangent.c
+++ b/source/blender/blenkernel/intern/mesh_tangent.c
@@ -452,7 +452,8 @@ void BKE_mesh_add_loop_tangent_named_layer_for_uv(CustomData *uv_data,
 {
   if (CustomData_get_named_layer_index(tan_data, CD_TANGENT, layer_name) == -1 &&
       CustomData_get_named_layer_index(uv_data, CD_MLOOPUV, layer_name) != -1) {
-    CustomData_add_layer_named(tan_data, CD_TANGENT, CD_CALLOC, NULL, numLoopData, layer_name);
+    CustomData_add_layer_named(
+        tan_data, CD_TANGENT, CD_SET_DEFAULT, NULL, numLoopData, layer_name);
   }
 }
 
@@ -581,7 +582,7 @@ void BKE_mesh_calc_loop_tangent_ex(const MVert *mvert,
     if ((tangent_mask & DM_TANGENT_MASK_ORCO) &&
         CustomData_get_named_layer_index(loopdata, CD_TANGENT, "") == -1) {
       CustomData_add_layer_named(
-          loopdata_out, CD_TANGENT, CD_CALLOC, NULL, (int)loopdata_out_len, "");
+          loopdata_out, CD_TANGENT, CD_SET_DEFAULT, NULL, (int)loopdata_out_len, "");
     }
     if (calc_act && act_uv_name[0]) {
       BKE_mesh_add_loop_tangent_named_layer_for_uv(
diff --git a/source/blender/blenkernel/intern/mesh_validate.cc b/source/blender/blenkernel/intern/mesh_validate.cc
index 0bc0822705c..3d8bbe3d6f8 100644
--- a/source/blender/blenkernel/intern/mesh_validate.cc
+++ b/source/blender/blenkernel/intern/mesh_validate.cc
@@ -1557,8 +1557,8 @@ void BKE_mesh_calc_edges_tessface(Mesh *mesh)
   /* write new edges into a temporary CustomData */
   CustomData edgeData;
   CustomData_reset(&edgeData);
-  CustomData_add_layer(&edgeData, CD_MEDGE, CD_CALLOC, nullptr, numEdges);
-  CustomData_add_layer(&edgeData, CD_ORIGINDEX, CD_CALLOC, nullptr, numEdges);
+  CustomData_add_layer(&edgeData, CD_MEDGE, CD_SET_DEFAULT, nullptr, numEdges);
+  CustomData_add_layer(&edgeData, CD_ORIGINDEX, CD_SET_DEFAULT, nullptr, numEdges);
 
   MEdge *med = (MEdge *)CustomData_get_layer(&edgeData, CD_MEDGE);
   int *index = (int *)CustomData_get_layer(&edgeData, CD_ORIGINDEX);
diff --git a/source/blender/blenkernel/intern/multires.c b/source/blender/blenkernel/intern/multires.c
index 63945f9ed42..5c382a4e864 100644
--- a/source/blender/blenkernel/intern/multires.c
+++ b/source/blender/blenkernel/intern/multires.c
@@ -960,7 +960,7 @@ static void multiresModifier_disp_run(
 
   if (!mdisps) {
     if (op == CALC_DISPLACEMENTS) {
-      mdisps = CustomData_add_layer(&me->ldata, CD_MDISPS, CD_DEFAULT, NULL, me->totloop);
+      mdisps = CustomData_add_layer(&me->ldata, CD_MDISPS, CD_SET_DEFAULT, NULL, me->totloop);
     }
     else {
       return;
@@ -1487,7 +1487,7 @@ void multires_ensure_external_read(struct Mesh *mesh, int top_level)
 
   MDisps *mdisps = CustomData_get_layer(&mesh->ldata, CD_MDISPS);
   if (mdisps == NULL) {
-    mdisps = CustomData_add_layer(&mesh->ldata, CD_MDISPS, CD_DEFAULT, NULL, mesh->totloop);
+    mdisps = CustomData_add_layer(&mesh->ldata, CD_MDISPS, CD_SET_DEFAULT, NULL, mesh->totloop);
   }
 
   const int totloop = mesh->totloop;
diff --git a/source/blender/blenkernel/intern/multires_reshape.c b/source/blender/blenkernel/intern/multires_reshape.c
index b50a0787fe3..17e4860ab1b 100644
--- a/source/blender/blenkernel/intern/multires_reshape.c
+++ b/source/blender/blenkernel/intern/multires_reshape.c
@@ -181,7 +181,8 @@ void multiresModifier_subdivide_to_level(struct Object *object,
    * are allocated at a proper level and return. */
   const bool has_mdisps = CustomData_has_layer(&coarse_mesh->ldata, CD_MDISPS);
   if (!has_mdisps) {
-    CustomData_add_layer(&coarse_mesh->ldata, CD_MDISPS, CD_CALLOC, NULL, coarse_mesh->totloop);
+    CustomData_add_layer(
+        &coarse_mesh->ldata, CD_MDISPS, CD_SET_DEFAULT, NULL, coarse_mesh->totloop);
   }
 
   /* NOTE: Subdivision happens from the top level of the existing multires modifier. If it is set
diff --git a/source/blender/blenkernel/intern/multires_reshape_subdivide.c b/source/blender/blenkernel/intern/multires_reshape_subdivide.c
index 9fa3e93a1e6..cecb57f4de4 100644
--- a/source/blender/blenkernel/intern/multires_reshape_subdivide.c
+++ b/source/blender/blenkernel/intern/multires_reshape_subdivide.c
@@ -68,7 +68,8 @@ void multires_subdivide_create_tangent_displacement_linear_grids(Object *object,
 
   const bool has_mdisps = CustomData_has_layer(&coarse_mesh->ldata, CD_MDISPS);
   if (!has_mdisps) {
-    CustomData_add_layer(&coarse_mesh->ldata, CD_MDISPS, CD_CALLOC, NULL, coarse_mesh->totloop);
+    CustomData_add_layer(
+        &coarse_mesh->ldata, CD_MDISPS, CD_SET_DEFAULT, NULL, coarse_mesh->totloop);
   }
 
   if (new_top_level == 1) {
diff --git a/source/blender/blenkernel/intern/multires_unsubdivide.c b/source/blender/blenkernel/intern/multires_unsubdivide.c
index cad680ecedd..27a1f84579e 100644
--- a/source/blender/blenkernel/intern/multires_unsubdivide.c
+++ b/source/blender/blenkernel/intern/multires_unsubdivide.c
@@ -901,10 +901,10 @@ static void multires_unsubdivide_add_original_index_datalayers(Mesh *mesh)
   multires_unsubdivide_free_original_datalayers(mesh);
 
   int *l_index = CustomData_add_layer_named(
-      &mesh->ldata, CD_PROP_INT32, CD_CALLOC, NULL, mesh->totloop, lname);
+      &mesh->ldata, CD_PROP_INT32, CD_SET_DEFAULT, NULL, mesh->totloop, lname);
 
   int *v_index = CustomData_add_layer_named(
-      &mesh->vdata, CD_PROP_INT32, CD_CALLOC, NULL, mesh->totvert, vname);
+      &mesh->vdata, CD_PROP_INT32, CD_SET_DEFAULT, NULL, mesh->totvert, vname);
 
   /* Initialize these data-layer with the indices in the current mesh. */
   for (int i = 0; i < mesh->totloop; i++) {
@@ -1174,7 +1174,7 @@ static void multires_create_grids_in_unsubdivided_base_mesh(MultiresUnsubdivideC
     CustomData_free_layers(&base_mesh->ldata, CD_MDISPS, base_mesh->totloop);
   }
   MDisps *mdisps = CustomData_add_layer(
-      &base_mesh->ldata, CD_MDISPS, CD_CALLOC, NULL, base_mesh->totloop);
+      &base_mesh->ldata, CD_MDISPS, CD_SET_DEFAULT, NULL, base_mesh->totloop);
 
   const int totdisp = pow_i(BKE_ccg_gridsize(context->num_total_levels), 2);
   const int totloop = base_mesh->totloop;
diff --git a/source/blender/blenkernel/intern/node.cc b/source/blender/blenkernel/intern/node.cc
index 4ed2885dd90..4eb48e9edc9 100644
--- a/source/blender/blenkernel/intern/node.cc
+++ b/source/blender/blenkernel/intern/node.cc
@@ -72,7 +72,6 @@
 #include "NOD_function.h"
 #include "NOD_geometry.h"
 #include "NOD_node_declaration.hh"
-#include "NOD_node_tree_ref.hh"
 #include "NOD_shader.h"
 #include "NOD_socket.h"
 #include "NOD_texture.h"
@@ -104,7 +103,6 @@ using blender::nodes::NodeDeclaration;
 using blender::nodes::OutputFieldDependency;
 using blender::nodes::OutputSocketFieldType;
 using blender::nodes::SocketDeclaration;
-using namespace blender::nodes::node_tree_ref_types;
 
 /* Fallback types for undefined tree, nodes, sockets */
 static bNodeTreeType NodeTreeTypeUndefined;
@@ -4583,6 +4581,7 @@ static void registerShaderNodes()
   register_node_type_sh_wavelength();
   register_node_type_sh_blackbody();
   register_node_type_sh_mix_rgb();
+  register_node_type_sh_mix();
   register_node_type_sh_valtorgb();
   register_node_type_sh_rgbtobw();
   register_node_type_sh_shadertorgb();
diff --git a/source/blender/blenkernel/intern/node_runtime.cc b/source/blender/blenkernel/intern/node_runtime.cc
new file mode 100644
index 00000000000..0c78c0f09d1
--- /dev/null
+++ b/source/blender/blenkernel/intern/node_runtime.cc
@@ -0,0 +1,405 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "BKE_node.h"
+#include "BKE_node_runtime.hh"
+
+#include "DNA_node_types.h"
+
+#include "BLI_function_ref.hh"
+#include "BLI_stack.hh"
+#include "BLI_task.hh"
+#include "BLI_timeit.hh"
+
+namespace blender::bke::node_tree_runtime {
+
+static void double_checked_lock(std::mutex &mutex, bool &data_is_dirty, FunctionRef<void()> fn)
+{
+  if (!data_is_dirty) {
+    return;
+  }
+  std::lock_guard lock{mutex};
+  if (!data_is_dirty) {
+    return;
+  }
+  fn();
+  data_is_dirty = false;
+}
+
+static void double_checked_lock_with_task_isolation(std::mutex &mutex,
+                                                    bool &data_is_dirty,
+                                                    FunctionRef<void()> fn)
+{
+  double_checked_lock(mutex, data_is_dirty, [&]() { threading::isolate_task(fn); });
+}
+
+static void update_node_vector(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  tree_runtime.nodes.clear();
+  tree_runtime.has_undefined_nodes_or_sockets = false;
+  LISTBASE_FOREACH (bNode *, node, &ntree.nodes) {
+    node->runtime->index_in_tree = tree_runtime.nodes.append_and_get_index(node);
+    node->runtime->owner_tree = const_cast<bNodeTree *>(&ntree);
+    tree_runtime.has_undefined_nodes_or_sockets |= node->typeinfo == &NodeTypeUndefined;
+  }
+}
+
+static void update_link_vector(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  tree_runtime.links.clear();
+  LISTBASE_FOREACH (bNodeLink *, link, &ntree.links) {
+    tree_runtime.links.append(link);
+  }
+}
+
+static void update_internal_links(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  for (bNode *node : tree_runtime.nodes) {
+    node->runtime->internal_links.clear();
+    for (bNodeSocket *socket : node->runtime->outputs) {
+      socket->runtime->internal_link_input = nullptr;
+    }
+    LISTBASE_FOREACH (bNodeLink *, link, &node->internal_links) {
+      node->runtime->internal_links.append(link);
+      link->tosock->runtime->internal_link_input = link->fromsock;
+    }
+  }
+}
+
+static void update_socket_vectors_and_owner_node(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  tree_runtime.sockets.clear();
+  tree_runtime.input_sockets.clear();
+  tree_runtime.output_sockets.clear();
+  for (bNode *node : tree_runtime.nodes) {
+    bNodeRuntime &node_runtime = *node->runtime;
+    node_runtime.inputs.clear();
+    node_runtime.outputs.clear();
+    LISTBASE_FOREACH (bNodeSocket *, socket, &node->inputs) {
+      socket->runtime->index_in_node = node_runtime.inputs.append_and_get_index(socket);
+      socket->runtime->index_in_all_sockets = tree_runtime.sockets.append_and_get_index(socket);
+      socket->runtime->index_in_inout_sockets = tree_runtime.input_sockets.append_and_get_index(
+          socket);
+      socket->runtime->owner_node = node;
+      tree_runtime.has_undefined_nodes_or_sockets |= socket->typeinfo == &NodeSocketTypeUndefined;
+    }
+    LISTBASE_FOREACH (bNodeSocket *, socket, &node->outputs) {
+      socket->runtime->index_in_node = node_runtime.outputs.append_and_get_index(socket);
+      socket->runtime->index_in_all_sockets = tree_runtime.sockets.append_and_get_index(socket);
+      socket->runtime->index_in_inout_sockets = tree_runtime.output_sockets.append_and_get_index(
+          socket);
+      socket->runtime->owner_node = node;
+      tree_runtime.has_undefined_nodes_or_sockets |= socket->typeinfo == &NodeSocketTypeUndefined;
+    }
+  }
+}
+
+static void update_directly_linked_links_and_sockets(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  for (bNode *node : tree_runtime.nodes) {
+    for (bNodeSocket *socket : node->runtime->inputs) {
+      socket->runtime->directly_linked_links.clear();
+      socket->runtime->directly_linked_sockets.clear();
+    }
+    for (bNodeSocket *socket : node->runtime->outputs) {
+      socket->runtime->directly_linked_links.clear();
+      socket->runtime->directly_linked_sockets.clear();
+    }
+    node->runtime->has_linked_inputs = false;
+    node->runtime->has_linked_outputs = false;
+  }
+  for (bNodeLink *link : tree_runtime.links) {
+    link->fromsock->runtime->directly_linked_links.append(link);
+    link->fromsock->runtime->directly_linked_sockets.append(link->tosock);
+    link->tosock->runtime->directly_linked_links.append(link);
+    link->fromnode->runtime->has_linked_outputs = true;
+    link->tonode->runtime->has_linked_inputs = true;
+  }
+  for (bNodeSocket *socket : tree_runtime.input_sockets) {
+    if (socket->flag & SOCK_MULTI_INPUT) {
+      std::sort(socket->runtime->directly_linked_links.begin(),
+                socket->runtime->directly_linked_links.end(),
+                [&](const bNodeLink *a, const bNodeLink *b) {
+                  return a->multi_input_socket_index > b->multi_input_socket_index;
+                });
+    }
+  }
+  for (bNodeSocket *socket : tree_runtime.input_sockets) {
+    for (bNodeLink *link : socket->runtime->directly_linked_links) {
+      /* Do this after sorting the input links. */
+      socket->runtime->directly_linked_sockets.append(link->fromsock);
+    }
+  }
+}
+
+static void find_logical_origins_for_socket_recursive(
+    bNodeSocket &input_socket,
+    bool only_follow_first_input_link,
+    Vector<bNodeSocket *, 16> &sockets_in_current_chain,
+    Vector<bNodeSocket *> &r_logical_origins,
+    Vector<bNodeSocket *> &r_skipped_origins)
+{
+  if (sockets_in_current_chain.contains(&input_socket)) {
+    /* Protect against reroute recursions. */
+    return;
+  }
+  sockets_in_current_chain.append(&input_socket);
+
+  Span<bNodeLink *> links_to_check = input_socket.runtime->directly_linked_links;
+  if (only_follow_first_input_link) {
+    links_to_check = links_to_check.take_front(1);
+  }
+  for (bNodeLink *link : links_to_check) {
+    if (link->flag & NODE_LINK_MUTED) {
+      continue;
+    }
+    bNodeSocket &origin_socket = *link->fromsock;
+    bNode &origin_node = *link->fromnode;
+    if (!origin_socket.is_available()) {
+      /* Non available sockets are ignored. */
+      continue;
+    }
+    if (origin_node.type == NODE_REROUTE) {
+      bNodeSocket &reroute_input = *origin_node.runtime->inputs[0];
+      bNodeSocket &reroute_output = *origin_node.runtime->outputs[0];
+      r_skipped_origins.append(&reroute_input);
+      r_skipped_origins.append(&reroute_output);
+      find_logical_origins_for_socket_recursive(
+          reroute_input, false, sockets_in_current_chain, r_logical_origins, r_skipped_origins);
+      continue;
+    }
+    if (origin_node.is_muted()) {
+      if (bNodeSocket *mute_input = origin_socket.runtime->internal_link_input) {
+        r_skipped_origins.append(&origin_socket);
+        r_skipped_origins.append(mute_input);
+        find_logical_origins_for_socket_recursive(
+            *mute_input, true, sockets_in_current_chain, r_logical_origins, r_skipped_origins);
+      }
+      continue;
+    }
+    r_logical_origins.append(&origin_socket);
+  }
+
+  sockets_in_current_chain.pop_last();
+}
+
+static void update_logical_origins(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  threading::parallel_for(tree_runtime.nodes.index_range(), 128, [&](const IndexRange range) {
+    for (const int i : range) {
+      bNode &node = *tree_runtime.nodes[i];
+      for (bNodeSocket *socket : node.runtime->inputs) {
+        Vector<bNodeSocket *, 16> sockets_in_current_chain;
+        socket->runtime->logically_linked_sockets.clear();
+        socket->runtime->logically_linked_skipped_sockets.clear();
+        find_logical_origins_for_socket_recursive(
+            *socket,
+            false,
+            sockets_in_current_chain,
+            socket->runtime->logically_linked_sockets,
+            socket->runtime->logically_linked_skipped_sockets);
+      }
+    }
+  });
+}
+
+static void update_nodes_by_type(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  tree_runtime.nodes_by_type.clear();
+  for (bNode *node : tree_runtime.nodes) {
+    tree_runtime.nodes_by_type.add(node->typeinfo, node);
+  }
+}
+
+static void update_sockets_by_identifier(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  threading::parallel_for(tree_runtime.nodes.index_range(), 128, [&](const IndexRange range) {
+    for (bNode *node : tree_runtime.nodes.as_span().slice(range)) {
+      node->runtime->inputs_by_identifier.clear();
+      node->runtime->outputs_by_identifier.clear();
+      for (bNodeSocket *socket : node->runtime->inputs) {
+        node->runtime->inputs_by_identifier.add_new(socket->identifier, socket);
+      }
+      for (bNodeSocket *socket : node->runtime->outputs) {
+        node->runtime->outputs_by_identifier.add_new(socket->identifier, socket);
+      }
+    }
+  });
+}
+
+enum class ToposortDirection {
+  LeftToRight,
+  RightToLeft,
+};
+
+struct ToposortNodeState {
+  bool is_done = false;
+  bool is_in_stack = false;
+};
+
+static void toposort_from_start_node(const ToposortDirection direction,
+                                     bNode &start_node,
+                                     MutableSpan<ToposortNodeState> node_states,
+                                     Vector<bNode *> &r_sorted_nodes,
+                                     bool &r_cycle_detected)
+{
+  struct Item {
+    bNode *node;
+    int socket_index = 0;
+    int link_index = 0;
+  };
+
+  Stack<Item, 64> nodes_to_check;
+  nodes_to_check.push({&start_node});
+  while (!nodes_to_check.is_empty()) {
+    Item &item = nodes_to_check.peek();
+    bNode &node = *item.node;
+    const Span<bNodeSocket *> sockets = (direction == ToposortDirection::LeftToRight) ?
+                                            node.runtime->inputs :
+                                            node.runtime->outputs;
+    while (true) {
+      if (item.socket_index == sockets.size()) {
+        /* All sockets have already been visited. */
+        break;
+      }
+      bNodeSocket &socket = *sockets[item.socket_index];
+      const Span<bNodeSocket *> linked_sockets = socket.runtime->directly_linked_sockets;
+      if (item.link_index == linked_sockets.size()) {
+        /* All links connected to this socket have already been visited. */
+        item.socket_index++;
+        item.link_index = 0;
+        continue;
+      }
+      bNodeSocket &linked_socket = *linked_sockets[item.link_index];
+      bNode &linked_node = *linked_socket.runtime->owner_node;
+      ToposortNodeState &linked_node_state = node_states[linked_node.runtime->index_in_tree];
+      if (linked_node_state.is_done) {
+        /* The linked node has already been visited. */
+        item.link_index++;
+        continue;
+      }
+      if (linked_node_state.is_in_stack) {
+        r_cycle_detected = true;
+      }
+      else {
+        nodes_to_check.push({&linked_node});
+        linked_node_state.is_in_stack = true;
+      }
+      break;
+    }
+
+    /* If no other element has been pushed, the current node can be pushed to the sorted list. */
+    if (&item == &nodes_to_check.peek()) {
+      ToposortNodeState &node_state = node_states[node.runtime->index_in_tree];
+      node_state.is_done = true;
+      node_state.is_in_stack = false;
+      r_sorted_nodes.append(&node);
+      nodes_to_check.pop();
+    }
+  }
+}
+
+static void update_toposort(const bNodeTree &ntree,
+                            const ToposortDirection direction,
+                            Vector<bNode *> &r_sorted_nodes,
+                            bool &r_cycle_detected)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  r_sorted_nodes.clear();
+  r_sorted_nodes.reserve(tree_runtime.nodes.size());
+  r_cycle_detected = false;
+
+  Array<ToposortNodeState> node_states(tree_runtime.nodes.size());
+  for (bNode *node : tree_runtime.nodes) {
+    if (node_states[node->runtime->index_in_tree].is_done) {
+      /* Ignore nodes that are done already. */
+      continue;
+    }
+    if ((direction == ToposortDirection::LeftToRight) ? node->runtime->has_linked_outputs :
+                                                        node->runtime->has_linked_inputs) {
+      /* Ignore non-start nodes. */
+      continue;
+    }
+    toposort_from_start_node(direction, *node, node_states, r_sorted_nodes, r_cycle_detected);
+  }
+
+  if (r_sorted_nodes.size() < tree_runtime.nodes.size()) {
+    r_cycle_detected = true;
+    for (bNode *node : tree_runtime.nodes) {
+      if (node_states[node->runtime->index_in_tree].is_done) {
+        /* Ignore nodes that are done already. */
+        continue;
+      }
+      /* Start toposort at this node which is somewhere in the middle of a loop. */
+      toposort_from_start_node(direction, *node, node_states, r_sorted_nodes, r_cycle_detected);
+    }
+  }
+
+  BLI_assert(tree_runtime.nodes.size() == r_sorted_nodes.size());
+}
+
+static void update_group_output_node(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  const bNodeType *node_type = nodeTypeFind("NodeGroupOutput");
+  const Span<bNode *> group_output_nodes = tree_runtime.nodes_by_type.lookup(node_type);
+  if (group_output_nodes.is_empty()) {
+    tree_runtime.group_output_node = nullptr;
+  }
+  else if (group_output_nodes.size() == 1) {
+    tree_runtime.group_output_node = group_output_nodes[0];
+  }
+  else {
+    for (bNode *group_output : group_output_nodes) {
+      if (group_output->flag & NODE_DO_OUTPUT) {
+        tree_runtime.group_output_node = group_output;
+        break;
+      }
+    }
+  }
+}
+
+static void ensure_topology_cache(const bNodeTree &ntree)
+{
+  bNodeTreeRuntime &tree_runtime = *ntree.runtime;
+  double_checked_lock_with_task_isolation(
+      tree_runtime.topology_cache_mutex, tree_runtime.topology_cache_is_dirty, [&]() {
+        update_node_vector(ntree);
+        update_link_vector(ntree);
+        update_socket_vectors_and_owner_node(ntree);
+        update_internal_links(ntree);
+        update_directly_linked_links_and_sockets(ntree);
+        threading::parallel_invoke([&]() { update_logical_origins(ntree); },
+                                   [&]() { update_nodes_by_type(ntree); },
+                                   [&]() { update_sockets_by_identifier(ntree); },
+                                   [&]() {
+                                     update_toposort(ntree,
+                                                     ToposortDirection::LeftToRight,
+                                                     tree_runtime.toposort_left_to_right,
+                                                     tree_runtime.has_link_cycle);
+                                   },
+                                   [&]() {
+                                     bool dummy;
+                                     update_toposort(ntree,
+                                                     ToposortDirection::RightToLeft,
+                                                     tree_runtime.toposort_right_to_left,
+                                                     dummy);
+                                   });
+        update_group_output_node(ntree);
+        tree_runtime.topology_cache_exists = true;
+      });
+}
+
+}  // namespace blender::bke::node_tree_runtime
+
+void bNodeTree::ensure_topology_cache() const
+{
+  blender::bke::node_tree_runtime::ensure_topology_cache(*this);
+}
diff --git a/source/blender/blenkernel/intern/node_tree_update.cc b/source/blender/blenkernel/intern/node_tree_update.cc
index 58084226b00..a9097bcb94a 100644
--- a/source/blender/blenkernel/intern/node_tree_update.cc
+++ b/source/blender/blenkernel/intern/node_tree_update.cc
@@ -5,6 +5,7 @@
 #include "BLI_noise.hh"
 #include "BLI_set.hh"
 #include "BLI_stack.hh"
+#include "BLI_timeit.hh"
 #include "BLI_vector_set.hh"
 
 #include "DNA_anim_types.h"
@@ -21,7 +22,6 @@
 #include "MOD_nodes.h"
 
 #include "NOD_node_declaration.hh"
-#include "NOD_node_tree_ref.hh"
 #include "NOD_texture.h"
 
 #include "DEG_depsgraph_query.h"
@@ -50,6 +50,7 @@ enum eNodeTreeChangedFlag {
 static void add_tree_tag(bNodeTree *ntree, const eNodeTreeChangedFlag flag)
 {
   ntree->runtime->changed_flag |= flag;
+  ntree->runtime->topology_cache_is_dirty = true;
 }
 
 static void add_node_tag(bNodeTree *ntree, bNode *node, const eNodeTreeChangedFlag flag)
@@ -73,31 +74,32 @@ static bool is_field_socket_type(eNodeSocketDatatype type)
   return ELEM(type, SOCK_FLOAT, SOCK_INT, SOCK_BOOLEAN, SOCK_VECTOR, SOCK_RGBA);
 }
 
-static bool is_field_socket_type(const SocketRef &socket)
+static bool is_field_socket_type(const bNodeSocket &socket)
 {
-  return is_field_socket_type((eNodeSocketDatatype)socket.typeinfo()->type);
+  return is_field_socket_type((eNodeSocketDatatype)socket.typeinfo->type);
 }
 
-static InputSocketFieldType get_interface_input_field_type(const NodeRef &node,
-                                                           const InputSocketRef &socket)
+static InputSocketFieldType get_interface_input_field_type(const bNode &node,
+                                                           const bNodeSocket &socket)
 {
   if (!is_field_socket_type(socket)) {
     return InputSocketFieldType::None;
   }
-  if (node.is_reroute_node()) {
+  if (node.type == NODE_REROUTE) {
     return InputSocketFieldType::IsSupported;
   }
-  if (node.is_group_output_node()) {
+  if (node.type == NODE_GROUP_OUTPUT) {
     /* Outputs always support fields when the data type is correct. */
     return InputSocketFieldType::IsSupported;
   }
-  if (node.is_undefined()) {
+  if (node.typeinfo == &NodeTypeUndefined) {
     return InputSocketFieldType::None;
   }
-  if (node.bnode()->type == NODE_CUSTOM) {
+  if (node.type == NODE_CUSTOM) {
     return InputSocketFieldType::None;
   }
 
+  /* TODO: Ensure declaration exists. */
   const NodeDeclaration *node_decl = node.declaration();
 
   /* Node declarations should be implemented for nodes involved here. */
@@ -116,25 +118,25 @@ static InputSocketFieldType get_interface_input_field_type(const NodeRef &node,
   return field_type;
 }
 
-static OutputFieldDependency get_interface_output_field_dependency(const NodeRef &node,
-                                                                   const OutputSocketRef &socket)
+static OutputFieldDependency get_interface_output_field_dependency(const bNode &node,
+                                                                   const bNodeSocket &socket)
 {
   if (!is_field_socket_type(socket)) {
     /* Non-field sockets always output data. */
     return OutputFieldDependency::ForDataSource();
   }
-  if (node.is_reroute_node()) {
+  if (node.type == NODE_REROUTE) {
     /* The reroute just forwards what is passed in. */
     return OutputFieldDependency::ForDependentField();
   }
-  if (node.is_group_input_node()) {
+  if (node.type == NODE_GROUP_INPUT) {
     /* Input nodes get special treatment in #determine_group_input_states. */
     return OutputFieldDependency::ForDependentField();
   }
-  if (node.is_undefined()) {
+  if (node.typeinfo == &NodeTypeUndefined) {
     return OutputFieldDependency::ForDataSource();
   }
-  if (node.bnode()->type == NODE_CUSTOM) {
+  if (node.type == NODE_CUSTOM) {
     return OutputFieldDependency::ForDataSource();
   }
 
@@ -153,12 +155,13 @@ static OutputFieldDependency get_interface_output_field_dependency(const NodeRef
   return socket_decl.output_field_dependency();
 }
 
-static FieldInferencingInterface get_dummy_field_inferencing_interface(const NodeRef &node)
+static FieldInferencingInterface get_dummy_field_inferencing_interface(const bNode &node)
 {
   FieldInferencingInterface inferencing_interface;
-  inferencing_interface.inputs.append_n_times(InputSocketFieldType::None, node.inputs().size());
+  inferencing_interface.inputs.append_n_times(InputSocketFieldType::None,
+                                              node.input_sockets().size());
   inferencing_interface.outputs.append_n_times(OutputFieldDependency::ForDataSource(),
-                                               node.outputs().size());
+                                               node.output_sockets().size());
   return inferencing_interface;
 }
 
@@ -167,11 +170,11 @@ static FieldInferencingInterface get_dummy_field_inferencing_interface(const Nod
  * In the future, this information can be stored in the node declaration. This would allow this
  * function to return a reference, making it more efficient.
  */
-static FieldInferencingInterface get_node_field_inferencing_interface(const NodeRef &node)
+static FieldInferencingInterface get_node_field_inferencing_interface(const bNode &node)
 {
   /* Node groups already reference all required information, so just return that. */
-  if (node.is_group_node()) {
-    bNodeTree *group = (bNodeTree *)node.bnode()->id;
+  if (node.is_group()) {
+    bNodeTree *group = (bNodeTree *)node.id;
     if (group == nullptr) {
       return FieldInferencingInterface();
     }
@@ -187,11 +190,11 @@ static FieldInferencingInterface get_node_field_inferencing_interface(const Node
   }
 
   FieldInferencingInterface inferencing_interface;
-  for (const InputSocketRef *input_socket : node.inputs()) {
+  for (const bNodeSocket *input_socket : node.input_sockets()) {
     inferencing_interface.inputs.append(get_interface_input_field_type(node, *input_socket));
   }
 
-  for (const OutputSocketRef *output_socket : node.outputs()) {
+  for (const bNodeSocket *output_socket : node.output_sockets()) {
     inferencing_interface.outputs.append(
         get_interface_output_field_dependency(node, *output_socket));
   }
@@ -215,11 +218,11 @@ struct SocketFieldState {
   bool requires_single = false;
 };
 
-static Vector<const InputSocketRef *> gather_input_socket_dependencies(
-    const OutputFieldDependency &field_dependency, const NodeRef &node)
+static Vector<const bNodeSocket *> gather_input_socket_dependencies(
+    const OutputFieldDependency &field_dependency, const bNode &node)
 {
   const OutputSocketFieldType type = field_dependency.field_type();
-  Vector<const InputSocketRef *> input_sockets;
+  Vector<const bNodeSocket *> input_sockets;
   switch (type) {
     case OutputSocketFieldType::FieldSource:
     case OutputSocketFieldType::None: {
@@ -227,13 +230,13 @@ static Vector<const InputSocketRef *> gather_input_socket_dependencies(
     }
     case OutputSocketFieldType::DependentField: {
       /* This output depends on all inputs. */
-      input_sockets.extend(node.inputs());
+      input_sockets.extend(node.input_sockets());
       break;
     }
     case OutputSocketFieldType::PartiallyDependent: {
       /* This output depends only on a few inputs. */
       for (const int i : field_dependency.linked_input_indices()) {
-        input_sockets.append(&node.input(i));
+        input_sockets.append(&node.input_socket(i));
       }
       break;
     }
@@ -246,8 +249,7 @@ static Vector<const InputSocketRef *> gather_input_socket_dependencies(
  * to figure out if it is always a field or if it depends on any group inputs.
  */
 static OutputFieldDependency find_group_output_dependencies(
-    const InputSocketRef &group_output_socket,
-    const Span<SocketFieldState> field_state_by_socket_id)
+    const bNodeSocket &group_output_socket, const Span<SocketFieldState> field_state_by_socket_id)
 {
   if (!is_field_socket_type(group_output_socket)) {
     return OutputFieldDependency::ForDataSource();
@@ -255,8 +257,8 @@ static OutputFieldDependency find_group_output_dependencies(
 
   /* Use a Set here instead of an array indexed by socket id, because we my only need to look at
    * very few sockets. */
-  Set<const InputSocketRef *> handled_sockets;
-  Stack<const InputSocketRef *> sockets_to_check;
+  Set<const bNodeSocket *> handled_sockets;
+  Stack<const bNodeSocket *> sockets_to_check;
 
   handled_sockets.add(&group_output_socket);
   sockets_to_check.push(&group_output_socket);
@@ -265,20 +267,21 @@ static OutputFieldDependency find_group_output_dependencies(
   Vector<int> linked_input_indices;
 
   while (!sockets_to_check.is_empty()) {
-    const InputSocketRef *input_socket = sockets_to_check.pop();
+    const bNodeSocket *input_socket = sockets_to_check.pop();
 
     if (!input_socket->is_directly_linked() &&
-        !field_state_by_socket_id[input_socket->id()].is_single) {
+        !field_state_by_socket_id[input_socket->index_in_tree()].is_single) {
       /* This socket uses a field as input by default. */
       return OutputFieldDependency::ForFieldSource();
     }
 
-    for (const OutputSocketRef *origin_socket : input_socket->directly_linked_sockets()) {
-      const NodeRef &origin_node = origin_socket->node();
-      const SocketFieldState &origin_state = field_state_by_socket_id[origin_socket->id()];
+    for (const bNodeSocket *origin_socket : input_socket->directly_linked_sockets()) {
+      const bNode &origin_node = origin_socket->owner_node();
+      const SocketFieldState &origin_state =
+          field_state_by_socket_id[origin_socket->index_in_tree()];
 
       if (origin_state.is_field_source) {
-        if (origin_node.is_group_input_node()) {
+        if (origin_node.type == NODE_GROUP_INPUT) {
           /* Found a group input that the group output depends on. */
           linked_input_indices.append_non_duplicates(origin_socket->index());
         }
@@ -294,12 +297,12 @@ static OutputFieldDependency find_group_output_dependencies(
             inferencing_interface.outputs[origin_socket->index()];
 
         /* Propagate search further to the left. */
-        for (const InputSocketRef *origin_input_socket :
+        for (const bNodeSocket *origin_input_socket :
              gather_input_socket_dependencies(field_dependency, origin_node)) {
           if (!origin_input_socket->is_available()) {
             continue;
           }
-          if (!field_state_by_socket_id[origin_input_socket->id()].is_single) {
+          if (!field_state_by_socket_id[origin_input_socket->index_in_tree()].is_single) {
             if (handled_sockets.add(origin_input_socket)) {
               sockets_to_check.push(origin_input_socket);
             }
@@ -312,17 +315,16 @@ static OutputFieldDependency find_group_output_dependencies(
 }
 
 static void propagate_data_requirements_from_right_to_left(
-    const NodeTreeRef &tree, const MutableSpan<SocketFieldState> field_state_by_socket_id)
+    const bNodeTree &tree, const MutableSpan<SocketFieldState> field_state_by_socket_id)
 {
-  const NodeTreeRef::ToposortResult toposort_result = tree.toposort(
-      NodeTreeRef::ToposortDirection::RightToLeft);
+  const Span<const bNode *> toposort_result = tree.toposort_right_to_left();
 
-  for (const NodeRef *node : toposort_result.sorted_nodes) {
+  for (const bNode *node : toposort_result) {
     const FieldInferencingInterface inferencing_interface = get_node_field_inferencing_interface(
         *node);
 
-    for (const OutputSocketRef *output_socket : node->outputs()) {
-      SocketFieldState &state = field_state_by_socket_id[output_socket->id()];
+    for (const bNodeSocket *output_socket : node->output_sockets()) {
+      SocketFieldState &state = field_state_by_socket_id[output_socket->index_in_tree()];
 
       const OutputFieldDependency &field_dependency =
           inferencing_interface.outputs[output_socket->index()];
@@ -338,17 +340,18 @@ static void propagate_data_requirements_from_right_to_left(
 
       /* The output is required to be a single value when it is connected to any input that does
        * not support fields. */
-      for (const InputSocketRef *target_socket : output_socket->directly_linked_sockets()) {
+      for (const bNodeSocket *target_socket : output_socket->directly_linked_sockets()) {
         if (target_socket->is_available()) {
-          state.requires_single |= field_state_by_socket_id[target_socket->id()].requires_single;
+          state.requires_single |=
+              field_state_by_socket_id[target_socket->index_in_tree()].requires_single;
         }
       }
 
       if (state.requires_single) {
         bool any_input_is_field_implicitly = false;
-        const Vector<const InputSocketRef *> connected_inputs = gather_input_socket_dependencies(
+        const Vector<const bNodeSocket *> connected_inputs = gather_input_socket_dependencies(
             field_dependency, *node);
-        for (const InputSocketRef *input_socket : connected_inputs) {
+        for (const bNodeSocket *input_socket : connected_inputs) {
           if (!input_socket->is_available()) {
             continue;
           }
@@ -367,16 +370,16 @@ static void propagate_data_requirements_from_right_to_left(
         else {
           /* If the output is required to be a single value, the connected inputs in the same node
            * must not be fields as well. */
-          for (const InputSocketRef *input_socket : connected_inputs) {
-            field_state_by_socket_id[input_socket->id()].requires_single = true;
+          for (const bNodeSocket *input_socket : connected_inputs) {
+            field_state_by_socket_id[input_socket->index_in_tree()].requires_single = true;
           }
         }
       }
     }
 
     /* Some inputs do not require fields independent of what the outputs are connected to. */
-    for (const InputSocketRef *input_socket : node->inputs()) {
-      SocketFieldState &state = field_state_by_socket_id[input_socket->id()];
+    for (const bNodeSocket *input_socket : node->input_sockets()) {
+      SocketFieldState &state = field_state_by_socket_id[input_socket->index_in_tree()];
       if (inferencing_interface.inputs[input_socket->index()] == InputSocketFieldType::None) {
         state.requires_single = true;
         state.is_always_single = true;
@@ -386,14 +389,14 @@ static void propagate_data_requirements_from_right_to_left(
 }
 
 static void determine_group_input_states(
-    const NodeTreeRef &tree,
+    const bNodeTree &tree,
     FieldInferencingInterface &new_inferencing_interface,
     const MutableSpan<SocketFieldState> field_state_by_socket_id)
 {
   {
     /* Non-field inputs never support fields. */
     int index;
-    LISTBASE_FOREACH_INDEX (bNodeSocket *, group_input, &tree.btree()->inputs, index) {
+    LISTBASE_FOREACH_INDEX (bNodeSocket *, group_input, &tree.inputs, index) {
       if (!is_field_socket_type((eNodeSocketDatatype)group_input->type)) {
         new_inferencing_interface.inputs[index] = InputSocketFieldType::None;
       }
@@ -401,18 +404,18 @@ static void determine_group_input_states(
   }
   /* Check if group inputs are required to be single values, because they are (indirectly)
    * connected to some socket that does not support fields. */
-  for (const NodeRef *node : tree.nodes_by_type("NodeGroupInput")) {
-    for (const OutputSocketRef *output_socket : node->outputs().drop_back(1)) {
-      SocketFieldState &state = field_state_by_socket_id[output_socket->id()];
+  for (const bNode *node : tree.nodes_by_type("NodeGroupInput")) {
+    for (const bNodeSocket *output_socket : node->output_sockets().drop_back(1)) {
+      SocketFieldState &state = field_state_by_socket_id[output_socket->index_in_tree()];
       if (state.requires_single) {
         new_inferencing_interface.inputs[output_socket->index()] = InputSocketFieldType::None;
       }
     }
   }
   /* If an input does not support fields, this should be reflected in all Group Input nodes. */
-  for (const NodeRef *node : tree.nodes_by_type("NodeGroupInput")) {
-    for (const OutputSocketRef *output_socket : node->outputs().drop_back(1)) {
-      SocketFieldState &state = field_state_by_socket_id[output_socket->id()];
+  for (const bNode *node : tree.nodes_by_type("NodeGroupInput")) {
+    for (const bNodeSocket *output_socket : node->output_sockets().drop_back(1)) {
+      SocketFieldState &state = field_state_by_socket_id[output_socket->index_in_tree()];
       const bool supports_field = new_inferencing_interface.inputs[output_socket->index()] !=
                                   InputSocketFieldType::None;
       if (supports_field) {
@@ -423,19 +426,19 @@ static void determine_group_input_states(
         state.requires_single = true;
       }
     }
-    SocketFieldState &dummy_socket_state = field_state_by_socket_id[node->outputs().last()->id()];
+    SocketFieldState &dummy_socket_state =
+        field_state_by_socket_id[node->output_sockets().last()->index_in_tree()];
     dummy_socket_state.requires_single = true;
   }
 }
 
 static void propagate_field_status_from_left_to_right(
-    const NodeTreeRef &tree, const MutableSpan<SocketFieldState> field_state_by_socket_id)
+    const bNodeTree &tree, const MutableSpan<SocketFieldState> field_state_by_socket_id)
 {
-  const NodeTreeRef::ToposortResult toposort_result = tree.toposort(
-      NodeTreeRef::ToposortDirection::LeftToRight);
+  const Span<const bNode *> toposort_result = tree.toposort_left_to_right();
 
-  for (const NodeRef *node : toposort_result.sorted_nodes) {
-    if (node->is_group_input_node()) {
+  for (const bNode *node : toposort_result) {
+    if (node->type == NODE_GROUP_INPUT) {
       continue;
     }
 
@@ -443,22 +446,22 @@ static void propagate_field_status_from_left_to_right(
         *node);
 
     /* Update field state of input sockets, also taking into account linked origin sockets. */
-    for (const InputSocketRef *input_socket : node->inputs()) {
-      SocketFieldState &state = field_state_by_socket_id[input_socket->id()];
+    for (const bNodeSocket *input_socket : node->input_sockets()) {
+      SocketFieldState &state = field_state_by_socket_id[input_socket->index_in_tree()];
       if (state.is_always_single) {
         state.is_single = true;
         continue;
       }
       state.is_single = true;
-      if (input_socket->directly_linked_sockets().is_empty()) {
+      if (!input_socket->is_directly_linked()) {
         if (inferencing_interface.inputs[input_socket->index()] ==
             InputSocketFieldType::Implicit) {
           state.is_single = false;
         }
       }
       else {
-        for (const OutputSocketRef *origin_socket : input_socket->directly_linked_sockets()) {
-          if (!field_state_by_socket_id[origin_socket->id()].is_single) {
+        for (const bNodeSocket *origin_socket : input_socket->directly_linked_sockets()) {
+          if (!field_state_by_socket_id[origin_socket->index_in_tree()].is_single) {
             state.is_single = false;
             break;
           }
@@ -467,8 +470,8 @@ static void propagate_field_status_from_left_to_right(
     }
 
     /* Update field state of output sockets, also taking into account input sockets. */
-    for (const OutputSocketRef *output_socket : node->outputs()) {
-      SocketFieldState &state = field_state_by_socket_id[output_socket->id()];
+    for (const bNodeSocket *output_socket : node->output_sockets()) {
+      SocketFieldState &state = field_state_by_socket_id[output_socket->index_in_tree()];
       const OutputFieldDependency &field_dependency =
           inferencing_interface.outputs[output_socket->index()];
 
@@ -484,12 +487,12 @@ static void propagate_field_status_from_left_to_right(
         }
         case OutputSocketFieldType::PartiallyDependent:
         case OutputSocketFieldType::DependentField: {
-          for (const InputSocketRef *input_socket :
+          for (const bNodeSocket *input_socket :
                gather_input_socket_dependencies(field_dependency, *node)) {
             if (!input_socket->is_available()) {
               continue;
             }
-            if (!field_state_by_socket_id[input_socket->id()].is_single) {
+            if (!field_state_by_socket_id[input_socket->index_in_tree()].is_single) {
               state.is_single = false;
               break;
             }
@@ -501,17 +504,18 @@ static void propagate_field_status_from_left_to_right(
   }
 }
 
-static void determine_group_output_states(const NodeTreeRef &tree,
+static void determine_group_output_states(const bNodeTree &tree,
                                           FieldInferencingInterface &new_inferencing_interface,
                                           const Span<SocketFieldState> field_state_by_socket_id)
 {
-  for (const NodeRef *group_output_node : tree.nodes_by_type("NodeGroupOutput")) {
+  for (const bNode *group_output_node : tree.nodes_by_type("NodeGroupOutput")) {
     /* Ignore inactive group output nodes. */
-    if (!(group_output_node->bnode()->flag & NODE_DO_OUTPUT)) {
+    if (!(group_output_node->flag & NODE_DO_OUTPUT)) {
       continue;
     }
     /* Determine dependencies of all group outputs. */
-    for (const InputSocketRef *group_output_socket : group_output_node->inputs().drop_back(1)) {
+    for (const bNodeSocket *group_output_socket :
+         group_output_node->input_sockets().drop_back(1)) {
       OutputFieldDependency field_dependency = find_group_output_dependencies(
           *group_output_socket, field_state_by_socket_id);
       new_inferencing_interface.outputs[group_output_socket->index()] = std::move(
@@ -521,7 +525,7 @@ static void determine_group_output_states(const NodeTreeRef &tree,
   }
 }
 
-static void update_socket_shapes(const NodeTreeRef &tree,
+static void update_socket_shapes(const bNodeTree &tree,
                                  const Span<SocketFieldState> field_state_by_socket_id)
 {
   const eNodeSocketDisplayShape requires_data_shape = SOCK_DISPLAY_SHAPE_CIRCLE;
@@ -541,32 +545,30 @@ static void update_socket_shapes(const NodeTreeRef &tree,
     return data_but_can_be_field_shape;
   };
 
-  for (const InputSocketRef *socket : tree.input_sockets()) {
-    bNodeSocket *bsocket = socket->bsocket();
-    const SocketFieldState &state = field_state_by_socket_id[socket->id()];
-    bsocket->display_shape = get_shape_for_state(state);
+  for (const bNodeSocket *socket : tree.all_input_sockets()) {
+    const SocketFieldState &state = field_state_by_socket_id[socket->index_in_tree()];
+    const_cast<bNodeSocket *>(socket)->display_shape = get_shape_for_state(state);
   }
-  for (const OutputSocketRef *socket : tree.output_sockets()) {
-    bNodeSocket *bsocket = socket->bsocket();
-    const SocketFieldState &state = field_state_by_socket_id[socket->id()];
-    bsocket->display_shape = get_shape_for_state(state);
+  for (const bNodeSocket *socket : tree.all_sockets()) {
+    const SocketFieldState &state = field_state_by_socket_id[socket->index_in_tree()];
+    const_cast<bNodeSocket *>(socket)->display_shape = get_shape_for_state(state);
   }
 }
 
-static bool update_field_inferencing(const NodeTreeRef &tree)
+static bool update_field_inferencing(const bNodeTree &tree)
 {
-  bNodeTree &btree = *tree.btree();
+  tree.ensure_topology_cache();
 
   /* Create new inferencing interface for this node group. */
   std::unique_ptr<FieldInferencingInterface> new_inferencing_interface =
       std::make_unique<FieldInferencingInterface>();
-  new_inferencing_interface->inputs.resize(BLI_listbase_count(&btree.inputs),
+  new_inferencing_interface->inputs.resize(BLI_listbase_count(&tree.inputs),
                                            InputSocketFieldType::IsSupported);
-  new_inferencing_interface->outputs.resize(BLI_listbase_count(&btree.outputs),
+  new_inferencing_interface->outputs.resize(BLI_listbase_count(&tree.outputs),
                                             OutputFieldDependency::ForDataSource());
 
   /* Keep track of the state of all sockets. The index into this array is #SocketRef::id(). */
-  Array<SocketFieldState> field_state_by_socket_id(tree.sockets().size());
+  Array<SocketFieldState> field_state_by_socket_id(tree.all_sockets().size());
 
   propagate_data_requirements_from_right_to_left(tree, field_state_by_socket_id);
   determine_group_input_states(tree, *new_inferencing_interface, field_state_by_socket_id);
@@ -575,10 +577,10 @@ static bool update_field_inferencing(const NodeTreeRef &tree)
   update_socket_shapes(tree, field_state_by_socket_id);
 
   /* Update the previous group interface. */
-  const bool group_interface_changed = !btree.runtime->field_inferencing_interface ||
-                                       *btree.runtime->field_inferencing_interface !=
+  const bool group_interface_changed = !tree.runtime->field_inferencing_interface ||
+                                       *tree.runtime->field_inferencing_interface !=
                                            *new_inferencing_interface;
-  btree.runtime->field_inferencing_interface = std::move(new_inferencing_interface);
+  tree.runtime->field_inferencing_interface = std::move(new_inferencing_interface);
 
   return group_interface_changed;
 }
@@ -979,29 +981,22 @@ class NodeTreeMainUpdater {
   {
     TreeUpdateResult result;
 
-    /* Use a #NodeTreeRef to speedup certain queries. It is rebuilt whenever the node tree topology
-     * changes, which typically happens zero or one times during the entire update of the node
-     * tree. */
-    std::unique_ptr<NodeTreeRef> tree_ref;
-    this->ensure_tree_ref(ntree, tree_ref);
-
-    this->update_socket_link_and_use(*tree_ref);
-    this->update_individual_nodes(ntree, tree_ref);
-    this->update_internal_links(ntree, tree_ref);
-    this->update_generic_callback(ntree, tree_ref);
+    this->update_socket_link_and_use(ntree);
+    this->update_individual_nodes(ntree);
+    this->update_internal_links(ntree);
+    this->update_generic_callback(ntree);
     this->remove_unused_previews_when_necessary(ntree);
 
-    this->ensure_tree_ref(ntree, tree_ref);
-    this->propagate_runtime_flags(*tree_ref);
+    this->propagate_runtime_flags(ntree);
     if (ntree.type == NTREE_GEOMETRY) {
-      if (node_field_inferencing::update_field_inferencing(*tree_ref)) {
+      if (node_field_inferencing::update_field_inferencing(ntree)) {
         result.interface_changed = true;
       }
     }
 
-    result.output_changed = this->check_if_output_changed(*tree_ref);
+    result.output_changed = this->check_if_output_changed(ntree);
 
-    this->update_socket_link_and_use(*tree_ref);
+    this->update_socket_link_and_use(ntree);
     this->update_node_levels(ntree);
     this->update_link_validation(ntree);
 
@@ -1021,86 +1016,69 @@ class NodeTreeMainUpdater {
     return result;
   }
 
-  void ensure_tree_ref(bNodeTree &ntree, std::unique_ptr<NodeTreeRef> &tree_ref)
-  {
-    if (!tree_ref) {
-      tree_ref = std::make_unique<NodeTreeRef>(&ntree);
-    }
-  }
-
-  void update_socket_link_and_use(const NodeTreeRef &tree)
+  void update_socket_link_and_use(bNodeTree &tree)
   {
-    for (const InputSocketRef *socket : tree.input_sockets()) {
-      bNodeSocket *bsocket = socket->bsocket();
+    tree.ensure_topology_cache();
+    for (bNodeSocket *socket : tree.all_input_sockets()) {
       if (socket->directly_linked_links().is_empty()) {
-        bsocket->link = nullptr;
+        socket->link = nullptr;
       }
       else {
-        bsocket->link = socket->directly_linked_links()[0]->blink();
+        socket->link = socket->directly_linked_links()[0];
       }
     }
 
     this->update_socket_used_tags(tree);
   }
 
-  void update_socket_used_tags(const NodeTreeRef &tree)
+  void update_socket_used_tags(bNodeTree &tree)
   {
-    for (const SocketRef *socket : tree.sockets()) {
-      bNodeSocket *bsocket = socket->bsocket();
-      bsocket->flag &= ~SOCK_IN_USE;
-      for (const LinkRef *link : socket->directly_linked_links()) {
+    tree.ensure_topology_cache();
+    for (bNodeSocket *socket : tree.all_sockets()) {
+      socket->flag &= ~SOCK_IN_USE;
+      for (const bNodeLink *link : socket->directly_linked_links()) {
         if (!link->is_muted()) {
-          bsocket->flag |= SOCK_IN_USE;
+          socket->flag |= SOCK_IN_USE;
           break;
         }
       }
     }
   }
 
-  void update_individual_nodes(bNodeTree &ntree, std::unique_ptr<NodeTreeRef> &tree_ref)
+  void update_individual_nodes(bNodeTree &ntree)
   {
-    /* Iterate over nodes instead of #NodeTreeRef, because the #tree_ref might be outdated after
-     * some update functions. */
-    LISTBASE_FOREACH (bNode *, bnode, &ntree.nodes) {
-      this->ensure_tree_ref(ntree, tree_ref);
-      const NodeRef &node = *tree_ref->find_node(*bnode);
-      if (this->should_update_individual_node(node)) {
-        const uint32_t old_changed_flag = ntree.runtime->changed_flag;
-        ntree.runtime->changed_flag = NTREE_CHANGED_NOTHING;
-
-        /* This may set #ntree.runtime->changed_flag which is detected below. */
-        this->update_individual_node(node);
-
-        if (ntree.runtime->changed_flag != NTREE_CHANGED_NOTHING) {
-          /* The tree ref is outdated and needs to be rebuilt. Generally, only very few update
-           * functions change the node. Typically zero or one nodes change after an update. */
-          tree_ref.reset();
+    LISTBASE_FOREACH (bNode *, node, &ntree.nodes) {
+      if (this->should_update_individual_node(ntree, *node)) {
+        bNodeType &ntype = *node->typeinfo;
+        if (ntype.group_update_func) {
+          ntype.group_update_func(&ntree, node);
+        }
+        if (ntype.updatefunc) {
+          ntype.updatefunc(&ntree, node);
         }
-        ntree.runtime->changed_flag |= old_changed_flag;
       }
     }
   }
 
-  bool should_update_individual_node(const NodeRef &node)
+  bool should_update_individual_node(const bNodeTree &ntree, const bNode &node)
   {
-    bNodeTree &ntree = *node.btree();
-    bNode &bnode = *node.bnode();
     if (ntree.runtime->changed_flag & NTREE_CHANGED_ANY) {
       return true;
     }
-    if (bnode.runtime->changed_flag & NTREE_CHANGED_NODE_PROPERTY) {
+    if (node.runtime->changed_flag & NTREE_CHANGED_NODE_PROPERTY) {
       return true;
     }
     if (ntree.runtime->changed_flag & NTREE_CHANGED_LINK) {
+      ntree.ensure_topology_cache();
       /* Node groups currently always rebuilt their sockets when they are updated.
        * So avoid calling the update method when no new link was added to it. */
-      if (node.is_group_input_node()) {
-        if (node.outputs().last()->is_directly_linked()) {
+      if (node.type == NODE_GROUP_INPUT) {
+        if (node.output_sockets().last()->is_directly_linked()) {
           return true;
         }
       }
-      else if (node.is_group_output_node()) {
-        if (node.inputs().last()->is_directly_linked()) {
+      else if (node.type == NODE_GROUP_OUTPUT) {
+        if (node.input_sockets().last()->is_directly_linked()) {
           return true;
         }
       }
@@ -1110,95 +1088,76 @@ class NodeTreeMainUpdater {
       }
     }
     if (ntree.runtime->changed_flag & NTREE_CHANGED_INTERFACE) {
-      if (node.is_group_input_node() || node.is_group_output_node()) {
+      if (ELEM(node.type, NODE_GROUP_INPUT, NODE_GROUP_OUTPUT)) {
         return true;
       }
     }
     return false;
   }
 
-  void update_individual_node(const NodeRef &node)
-  {
-    bNodeTree &ntree = *node.btree();
-    bNode &bnode = *node.bnode();
-    bNodeType &ntype = *bnode.typeinfo;
-    if (ntype.group_update_func) {
-      ntype.group_update_func(&ntree, &bnode);
-    }
-    if (ntype.updatefunc) {
-      ntype.updatefunc(&ntree, &bnode);
-    }
-  }
-
-  void update_internal_links(bNodeTree &ntree, std::unique_ptr<NodeTreeRef> &tree_ref)
+  void update_internal_links(bNodeTree &ntree)
   {
-    bool any_internal_links_updated = false;
-    this->ensure_tree_ref(ntree, tree_ref);
-    for (const NodeRef *node : tree_ref->nodes()) {
-      if (!this->should_update_individual_node(*node)) {
+    bke::node_tree_runtime::AllowUsingOutdatedInfo allow_outdated_info{ntree};
+    ntree.ensure_topology_cache();
+    for (bNode *node : ntree.all_nodes()) {
+      if (!this->should_update_individual_node(ntree, *node)) {
         continue;
       }
       /* Find all expected internal links. */
       Vector<std::pair<bNodeSocket *, bNodeSocket *>> expected_internal_links;
-      for (const OutputSocketRef *output_socket : node->outputs()) {
+      for (const bNodeSocket *output_socket : node->output_sockets()) {
         if (!output_socket->is_available()) {
           continue;
         }
         if (!output_socket->is_directly_linked()) {
           continue;
         }
-        if (output_socket->bsocket()->flag & SOCK_NO_INTERNAL_LINK) {
+        if (output_socket->flag & SOCK_NO_INTERNAL_LINK) {
           continue;
         }
-        const InputSocketRef *input_socket = this->find_internally_linked_input(output_socket);
+        const bNodeSocket *input_socket = this->find_internally_linked_input(output_socket);
         if (input_socket != nullptr) {
-          expected_internal_links.append({input_socket->bsocket(), output_socket->bsocket()});
+          expected_internal_links.append(
+              {const_cast<bNodeSocket *>(input_socket), const_cast<bNodeSocket *>(output_socket)});
         }
       }
-      /* rebuilt internal links if they have changed. */
-      if (node->internal_links().size() != expected_internal_links.size()) {
-        this->update_internal_links_in_node(ntree, *node->bnode(), expected_internal_links);
-        any_internal_links_updated = true;
+      /* Rebuilt internal links if they have changed. */
+      if (node->internal_links_span().size() != expected_internal_links.size()) {
+        this->update_internal_links_in_node(ntree, *node, expected_internal_links);
       }
       else {
         for (auto &item : expected_internal_links) {
           const bNodeSocket *from_socket = item.first;
           const bNodeSocket *to_socket = item.second;
           bool found = false;
-          for (const InternalLinkRef *internal_link : node->internal_links()) {
-            if (from_socket == internal_link->from().bsocket() &&
-                to_socket == internal_link->to().bsocket()) {
+          for (const bNodeLink *internal_link : node->internal_links_span()) {
+            if (from_socket == internal_link->fromsock && to_socket == internal_link->tosock) {
               found = true;
             }
           }
           if (!found) {
-            this->update_internal_links_in_node(ntree, *node->bnode(), expected_internal_links);
-            any_internal_links_updated = true;
+            this->update_internal_links_in_node(ntree, *node, expected_internal_links);
             break;
           }
         }
       }
     }
-
-    if (any_internal_links_updated) {
-      tree_ref.reset();
-    }
   }
 
-  const InputSocketRef *find_internally_linked_input(const OutputSocketRef *output_socket)
+  const bNodeSocket *find_internally_linked_input(const bNodeSocket *output_socket)
   {
-    const InputSocketRef *selected_socket = nullptr;
+    const bNodeSocket *selected_socket = nullptr;
     int selected_priority = -1;
     bool selected_is_linked = false;
-    for (const InputSocketRef *input_socket : output_socket->node().inputs()) {
+    for (const bNodeSocket *input_socket : output_socket->owner_node().input_sockets()) {
       if (!input_socket->is_available()) {
         continue;
       }
-      if (input_socket->bsocket()->flag & SOCK_NO_INTERNAL_LINK) {
+      if (input_socket->flag & SOCK_NO_INTERNAL_LINK) {
         continue;
       }
-      const int priority = get_internal_link_type_priority(input_socket->bsocket()->typeinfo,
-                                                           output_socket->bsocket()->typeinfo);
+      const int priority = get_internal_link_type_priority(input_socket->typeinfo,
+                                                           output_socket->typeinfo);
       if (priority < 0) {
         continue;
       }
@@ -1233,23 +1192,12 @@ class NodeTreeMainUpdater {
     BKE_ntree_update_tag_node_internal_link(&ntree, &node);
   }
 
-  void update_generic_callback(bNodeTree &ntree, std::unique_ptr<NodeTreeRef> &tree_ref)
+  void update_generic_callback(bNodeTree &ntree)
   {
     if (ntree.typeinfo->update == nullptr) {
       return;
     }
-
-    /* Reset the changed_flag to allow detecting when the update callback changed the node tree. */
-    const uint32_t old_changed_flag = ntree.runtime->changed_flag;
-    ntree.runtime->changed_flag = NTREE_CHANGED_NOTHING;
-
     ntree.typeinfo->update(&ntree);
-
-    if (ntree.runtime->changed_flag != NTREE_CHANGED_NOTHING) {
-      /* The tree ref is outdated and needs to be rebuilt. */
-      tree_ref.reset();
-    }
-    ntree.runtime->changed_flag |= old_changed_flag;
   }
 
   void remove_unused_previews_when_necessary(bNodeTree &ntree)
@@ -1264,25 +1212,26 @@ class NodeTreeMainUpdater {
     BKE_node_preview_remove_unused(&ntree);
   }
 
-  void propagate_runtime_flags(const NodeTreeRef &tree_ref)
+  void propagate_runtime_flags(const bNodeTree &ntree)
   {
-    bNodeTree &ntree = *tree_ref.btree();
+    ntree.ensure_topology_cache();
+
     ntree.runtime->runtime_flag = 0;
     if (ntree.type != NTREE_SHADER) {
       return;
     }
 
     /* Check if a used node group has an animated image. */
-    for (const NodeRef *group_node : tree_ref.nodes_by_type("ShaderNodeGroup")) {
-      const bNodeTree *group = reinterpret_cast<bNodeTree *>(group_node->bnode()->id);
+    for (const bNode *group_node : ntree.nodes_by_type("ShaderNodeGroup")) {
+      const bNodeTree *group = reinterpret_cast<bNodeTree *>(group_node->id);
       if (group != nullptr) {
         ntree.runtime->runtime_flag |= group->runtime->runtime_flag;
       }
     }
     /* Check if the tree itself has an animated image. */
     for (const StringRefNull idname : {"ShaderNodeTexImage", "ShaderNodeTexEnvironment"}) {
-      for (const NodeRef *node : tree_ref.nodes_by_type(idname)) {
-        Image *image = reinterpret_cast<Image *>(node->bnode()->id);
+      for (const bNode *node : ntree.nodes_by_type(idname)) {
+        Image *image = reinterpret_cast<Image *>(node->id);
         if (image != nullptr && BKE_image_is_animated(image)) {
           ntree.runtime->runtime_flag |= NTREE_RUNTIME_FLAG_HAS_IMAGE_ANIMATION;
           break;
@@ -1294,7 +1243,7 @@ class NodeTreeMainUpdater {
                                        "ShaderNodeOutputLight",
                                        "ShaderNodeOutputWorld",
                                        "ShaderNodeOutputAOV"}) {
-      const Span<const NodeRef *> nodes = tree_ref.nodes_by_type(idname);
+      const Span<const bNode *> nodes = ntree.nodes_by_type(idname);
       if (!nodes.is_empty()) {
         ntree.runtime->runtime_flag |= NTREE_RUNTIME_FLAG_HAS_MATERIAL_OUTPUT;
         break;
@@ -1325,20 +1274,20 @@ class NodeTreeMainUpdater {
     }
   }
 
-  bool check_if_output_changed(const NodeTreeRef &tree)
+  bool check_if_output_changed(const bNodeTree &tree)
   {
-    bNodeTree &btree = *tree.btree();
+    tree.ensure_topology_cache();
 
     /* Compute a hash that represents the node topology connected to the output. This always has to
      * be updated even if it is not used to detect changes right now. Otherwise
      * #btree.runtime.output_topology_hash will go out of date. */
-    const Vector<const SocketRef *> tree_output_sockets = this->find_output_sockets(tree);
-    const uint32_t old_topology_hash = btree.runtime->output_topology_hash;
+    const Vector<const bNodeSocket *> tree_output_sockets = this->find_output_sockets(tree);
+    const uint32_t old_topology_hash = tree.runtime->output_topology_hash;
     const uint32_t new_topology_hash = this->get_combined_socket_topology_hash(
         tree, tree_output_sockets);
-    btree.runtime->output_topology_hash = new_topology_hash;
+    tree.runtime->output_topology_hash = new_topology_hash;
 
-    if (const AnimData *adt = BKE_animdata_from_id(&btree.id)) {
+    if (const AnimData *adt = BKE_animdata_from_id(&tree.id)) {
       /* Drivers may copy values in the node tree around arbitrarily and may cause the output to
        * change even if it wouldn't without drivers. Only some special drivers like `frame/5` can
        * be used without causing updates all the time currently. In the future we could try to
@@ -1360,7 +1309,7 @@ class NodeTreeMainUpdater {
       }
     }
 
-    if (btree.runtime->changed_flag & NTREE_CHANGED_ANY) {
+    if (tree.runtime->changed_flag & NTREE_CHANGED_ANY) {
       return true;
     }
 
@@ -1369,8 +1318,8 @@ class NodeTreeMainUpdater {
     }
 
     /* The topology hash can only be used when only topology-changing operations have been done. */
-    if (btree.runtime->changed_flag ==
-        (btree.runtime->changed_flag & (NTREE_CHANGED_LINK | NTREE_CHANGED_REMOVED_NODE))) {
+    if (tree.runtime->changed_flag ==
+        (tree.runtime->changed_flag & (NTREE_CHANGED_LINK | NTREE_CHANGED_REMOVED_NODE))) {
       if (old_topology_hash == new_topology_hash) {
         return false;
       }
@@ -1383,15 +1332,15 @@ class NodeTreeMainUpdater {
     return true;
   }
 
-  Vector<const SocketRef *> find_output_sockets(const NodeTreeRef &tree)
+  Vector<const bNodeSocket *> find_output_sockets(const bNodeTree &tree)
   {
-    Vector<const SocketRef *> sockets;
-    for (const NodeRef *node : tree.nodes()) {
+    Vector<const bNodeSocket *> sockets;
+    for (const bNode *node : tree.all_nodes()) {
       if (!this->is_output_node(*node)) {
         continue;
       }
-      for (const InputSocketRef *socket : node->inputs()) {
-        if (socket->idname() != "NodeSocketVirtual") {
+      for (const bNodeSocket *socket : node->input_sockets()) {
+        if (!STREQ(socket->idname, "NodeSocketVirtual")) {
           sockets.append(socket);
         }
       }
@@ -1399,18 +1348,17 @@ class NodeTreeMainUpdater {
     return sockets;
   }
 
-  bool is_output_node(const NodeRef &node) const
+  bool is_output_node(const bNode &node) const
   {
-    const bNode &bnode = *node.bnode();
-    if (bnode.typeinfo->nclass == NODE_CLASS_OUTPUT) {
+    if (node.typeinfo->nclass == NODE_CLASS_OUTPUT) {
       return true;
     }
-    if (bnode.type == NODE_GROUP_OUTPUT) {
+    if (node.type == NODE_GROUP_OUTPUT) {
       return true;
     }
     /* Assume node groups without output sockets are outputs. */
-    if (bnode.type == NODE_GROUP) {
-      const bNodeTree *node_group = reinterpret_cast<const bNodeTree *>(bnode.id);
+    if (node.type == NODE_GROUP) {
+      const bNodeTree *node_group = reinterpret_cast<const bNodeTree *>(node.id);
       if (node_group != nullptr &&
           node_group->runtime->runtime_flag & NTREE_RUNTIME_FLAG_HAS_MATERIAL_OUTPUT) {
         return true;
@@ -1423,10 +1371,10 @@ class NodeTreeMainUpdater {
    * Computes a hash that changes when the node tree topology connected to an output node changes.
    * Adding reroutes does not have an effect on the hash.
    */
-  uint32_t get_combined_socket_topology_hash(const NodeTreeRef &tree,
-                                             Span<const SocketRef *> sockets)
+  uint32_t get_combined_socket_topology_hash(const bNodeTree &tree,
+                                             Span<const bNodeSocket *> sockets)
   {
-    if (tree.has_link_cycles()) {
+    if (tree.has_link_cycle()) {
       /* Return dummy value when the link has any cycles. The algorithm below could be improved to
        * handle cycles more gracefully. */
       return 0;
@@ -1439,29 +1387,28 @@ class NodeTreeMainUpdater {
     return combined_hash;
   }
 
-  Array<uint32_t> get_socket_topology_hashes(const NodeTreeRef &tree,
-                                             Span<const SocketRef *> sockets)
+  Array<uint32_t> get_socket_topology_hashes(const bNodeTree &tree,
+                                             Span<const bNodeSocket *> sockets)
   {
-    BLI_assert(!tree.has_link_cycles());
-    Array<std::optional<uint32_t>> hash_by_socket_id(tree.sockets().size());
-    Stack<const SocketRef *> sockets_to_check = sockets;
+    BLI_assert(!tree.has_link_cycle());
+    Array<std::optional<uint32_t>> hash_by_socket_id(tree.all_sockets().size());
+    Stack<const bNodeSocket *> sockets_to_check = sockets;
 
     while (!sockets_to_check.is_empty()) {
-      const SocketRef &in_out_socket = *sockets_to_check.peek();
-      const NodeRef &node = in_out_socket.node();
+      const bNodeSocket &socket = *sockets_to_check.peek();
+      const bNode &node = socket.owner_node();
 
-      if (hash_by_socket_id[in_out_socket.id()].has_value()) {
+      if (hash_by_socket_id[socket.index_in_tree()].has_value()) {
         sockets_to_check.pop();
         /* Socket is handled already. */
         continue;
       }
 
-      if (in_out_socket.is_input()) {
+      if (socket.is_input()) {
         /* For input sockets, first compute the hashes of all linked sockets. */
-        const InputSocketRef &socket = in_out_socket.as_input();
         bool all_origins_computed = true;
-        for (const OutputSocketRef *origin_socket : socket.logically_linked_sockets()) {
-          if (!hash_by_socket_id[origin_socket->id()].has_value()) {
+        for (const bNodeSocket *origin_socket : socket.logically_linked_sockets()) {
+          if (!hash_by_socket_id[origin_socket->index_in_tree()].has_value()) {
             sockets_to_check.push(origin_socket);
             all_origins_computed = false;
           }
@@ -1471,22 +1418,21 @@ class NodeTreeMainUpdater {
         }
         /* When the hashes for the linked sockets are ready, combine them into a hash for the input
          * socket. */
-        const uint64_t socket_ptr = (uintptr_t)socket.bsocket();
+        const uint64_t socket_ptr = (uintptr_t)&socket;
         uint32_t socket_hash = noise::hash(socket_ptr, socket_ptr >> 32);
-        for (const OutputSocketRef *origin_socket : socket.logically_linked_sockets()) {
-          const uint32_t origin_socket_hash = *hash_by_socket_id[origin_socket->id()];
+        for (const bNodeSocket *origin_socket : socket.logically_linked_sockets()) {
+          const uint32_t origin_socket_hash = *hash_by_socket_id[origin_socket->index_in_tree()];
           socket_hash = noise::hash(socket_hash, origin_socket_hash);
         }
-        hash_by_socket_id[socket.id()] = socket_hash;
+        hash_by_socket_id[socket.index_in_tree()] = socket_hash;
         sockets_to_check.pop();
       }
       else {
         /* For output sockets, first compute the hashes of all available input sockets. */
-        const OutputSocketRef &socket = in_out_socket.as_output();
         bool all_available_inputs_computed = true;
-        for (const InputSocketRef *input_socket : node.inputs()) {
+        for (const bNodeSocket *input_socket : node.input_sockets()) {
           if (input_socket->is_available()) {
-            if (!hash_by_socket_id[input_socket->id()].has_value()) {
+            if (!hash_by_socket_id[input_socket->index_in_tree()].has_value()) {
               sockets_to_check.push(input_socket);
               all_available_inputs_computed = false;
             }
@@ -1497,25 +1443,25 @@ class NodeTreeMainUpdater {
         }
         /* When all input socket hashes have been computed, combine them into a hash for the output
          * socket. */
-        const uint64_t socket_ptr = (uintptr_t)socket.bsocket();
+        const uint64_t socket_ptr = (uintptr_t)&socket;
         uint32_t socket_hash = noise::hash(socket_ptr, socket_ptr >> 32);
-        for (const InputSocketRef *input_socket : node.inputs()) {
+        for (const bNodeSocket *input_socket : node.input_sockets()) {
           if (input_socket->is_available()) {
-            const uint32_t input_socket_hash = *hash_by_socket_id[input_socket->id()];
+            const uint32_t input_socket_hash = *hash_by_socket_id[input_socket->index_in_tree()];
             socket_hash = noise::hash(socket_hash, input_socket_hash);
           }
         }
         /* The Image Texture node has a special case. The behavior of the color output changes
          * depending on whether the Alpha output is linked. */
-        if (node.bnode()->type == SH_NODE_TEX_IMAGE && socket.index() == 0) {
-          BLI_assert(socket.name() == "Color");
-          const OutputSocketRef &alpha_socket = node.output(1);
-          BLI_assert(alpha_socket.name() == "Alpha");
+        if (node.type == SH_NODE_TEX_IMAGE && socket.index() == 0) {
+          BLI_assert(STREQ(socket.name, "Color"));
+          const bNodeSocket &alpha_socket = node.output_socket(1);
+          BLI_assert(STREQ(alpha_socket.name, "Alpha"));
           if (alpha_socket.is_directly_linked()) {
             socket_hash = noise::hash(socket_hash);
           }
         }
-        hash_by_socket_id[socket.id()] = socket_hash;
+        hash_by_socket_id[socket.index_in_tree()] = socket_hash;
         sockets_to_check.pop();
       }
     }
@@ -1523,7 +1469,7 @@ class NodeTreeMainUpdater {
     /* Create output array. */
     Array<uint32_t> hashes(sockets.size());
     for (const int i : sockets.index_range()) {
-      hashes[i] = *hash_by_socket_id[sockets[i]->id()];
+      hashes[i] = *hash_by_socket_id[sockets[i]->index_in_tree()];
     }
     return hashes;
   }
@@ -1532,37 +1478,34 @@ class NodeTreeMainUpdater {
    * Returns true when any of the provided sockets changed its values. A change is detected by
    * checking the #changed_flag on connected sockets and nodes.
    */
-  bool check_if_socket_outputs_changed_based_on_flags(const NodeTreeRef &tree,
-                                                      Span<const SocketRef *> sockets)
+  bool check_if_socket_outputs_changed_based_on_flags(const bNodeTree &tree,
+                                                      Span<const bNodeSocket *> sockets)
   {
     /* Avoid visiting the same socket twice when multiple links point to the same socket. */
-    Array<bool> pushed_by_socket_id(tree.sockets().size(), false);
-    Stack<const SocketRef *> sockets_to_check = sockets;
+    Array<bool> pushed_by_socket_id(tree.all_sockets().size(), false);
+    Stack<const bNodeSocket *> sockets_to_check = sockets;
 
-    for (const SocketRef *socket : sockets) {
-      pushed_by_socket_id[socket->id()] = true;
+    for (const bNodeSocket *socket : sockets) {
+      pushed_by_socket_id[socket->index_in_tree()] = true;
     }
 
     while (!sockets_to_check.is_empty()) {
-      const SocketRef &in_out_socket = *sockets_to_check.pop();
-      const NodeRef &node = in_out_socket.node();
-      const bNode &bnode = *node.bnode();
-      const bNodeSocket &bsocket = *in_out_socket.bsocket();
-      if (bsocket.runtime->changed_flag != NTREE_CHANGED_NOTHING) {
+      const bNodeSocket &socket = *sockets_to_check.pop();
+      const bNode &node = socket.owner_node();
+      if (socket.runtime->changed_flag != NTREE_CHANGED_NOTHING) {
         return true;
       }
-      if (bnode.runtime->changed_flag != NTREE_CHANGED_NOTHING) {
-        const bool only_unused_internal_link_changed = (bnode.flag & NODE_MUTED) == 0 &&
-                                                       bnode.runtime->changed_flag ==
+      if (node.runtime->changed_flag != NTREE_CHANGED_NOTHING) {
+        const bool only_unused_internal_link_changed = !node.is_muted() &&
+                                                       node.runtime->changed_flag ==
                                                            NTREE_CHANGED_INTERNAL_LINK;
         if (!only_unused_internal_link_changed) {
           return true;
         }
       }
-      if (in_out_socket.is_input()) {
-        const InputSocketRef &socket = in_out_socket.as_input();
-        for (const OutputSocketRef *origin_socket : socket.logically_linked_sockets()) {
-          bool &pushed = pushed_by_socket_id[origin_socket->id()];
+      if (socket.is_input()) {
+        for (const bNodeSocket *origin_socket : socket.logically_linked_sockets()) {
+          bool &pushed = pushed_by_socket_id[origin_socket->index_in_tree()];
           if (!pushed) {
             sockets_to_check.push(origin_socket);
             pushed = true;
@@ -1570,10 +1513,9 @@ class NodeTreeMainUpdater {
         }
       }
       else {
-        const OutputSocketRef &socket = in_out_socket.as_output();
-        for (const InputSocketRef *input_socket : node.inputs()) {
+        for (const bNodeSocket *input_socket : node.input_sockets()) {
           if (input_socket->is_available()) {
-            bool &pushed = pushed_by_socket_id[input_socket->id()];
+            bool &pushed = pushed_by_socket_id[input_socket->index_in_tree()];
             if (!pushed) {
               sockets_to_check.push(input_socket);
               pushed = true;
@@ -1582,11 +1524,11 @@ class NodeTreeMainUpdater {
         }
         /* The Normal node has a special case, because the value stored in the first output socket
          * is used as input in the node. */
-        if (bnode.type == SH_NODE_NORMAL && socket.index() == 1) {
-          BLI_assert(socket.name() == "Dot");
-          const OutputSocketRef &normal_output = node.output(0);
-          BLI_assert(normal_output.name() == "Normal");
-          bool &pushed = pushed_by_socket_id[normal_output.id()];
+        if (node.type == SH_NODE_NORMAL && socket.index() == 1) {
+          BLI_assert(STREQ(socket.name, "Dot"));
+          const bNodeSocket &normal_output = node.output_socket(0);
+          BLI_assert(STREQ(normal_output.name, "Normal"));
+          bool &pushed = pushed_by_socket_id[normal_output.index_in_tree()];
           if (!pushed) {
             sockets_to_check.push(&normal_output);
             pushed = true;
diff --git a/source/blender/blenkernel/intern/object.cc b/source/blender/blenkernel/intern/object.cc
index 2a85811e2e8..c90c83074bd 100644
--- a/source/blender/blenkernel/intern/object.cc
+++ b/source/blender/blenkernel/intern/object.cc
@@ -1665,7 +1665,7 @@ static void copy_ccg_data(Mesh *mesh_destination, Mesh *mesh_source, int layer_t
   const int layer_index = CustomData_get_layer_index(data_destination, layer_type);
   CustomData_free_layer(data_destination, layer_type, num_elements, layer_index);
   BLI_assert(!CustomData_has_layer(data_destination, layer_type));
-  CustomData_add_layer(data_destination, layer_type, CD_CALLOC, nullptr, num_elements);
+  CustomData_add_layer(data_destination, layer_type, CD_SET_DEFAULT, nullptr, num_elements);
   BLI_assert(CustomData_has_layer(data_destination, layer_type));
   CustomData_copy_layer_type_data(data_source, data_destination, layer_type, 0, 0, num_elements);
 }
diff --git a/source/blender/blenkernel/intern/object_deform.c b/source/blender/blenkernel/intern/object_deform.c
index 310ec7678bd..08d98775e34 100644
--- a/source/blender/blenkernel/intern/object_deform.c
+++ b/source/blender/blenkernel/intern/object_deform.c
@@ -115,7 +115,8 @@ MDeformVert *BKE_object_defgroup_data_create(ID *id)
 {
   if (GS(id->name) == ID_ME) {
     Mesh *me = (Mesh *)id;
-    me->dvert = CustomData_add_layer(&me->vdata, CD_MDEFORMVERT, CD_CALLOC, NULL, me->totvert);
+    me->dvert = CustomData_add_layer(
+        &me->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, me->totvert);
     return me->dvert;
   }
   if (GS(id->name) == ID_LT) {
diff --git a/source/blender/blenkernel/intern/paint.cc b/source/blender/blenkernel/intern/paint.cc
index a6b0a4d96ee..4c3da5eabc4 100644
--- a/source/blender/blenkernel/intern/paint.cc
+++ b/source/blender/blenkernel/intern/paint.cc
@@ -1835,8 +1835,8 @@ static void sculpt_face_sets_ensure(Mesh *mesh)
     return;
   }
 
-  int *new_face_sets = static_cast<int *>(
-      CustomData_add_layer(&mesh->pdata, CD_SCULPT_FACE_SETS, CD_CALLOC, nullptr, mesh->totpoly));
+  int *new_face_sets = static_cast<int *>(CustomData_add_layer(
+      &mesh->pdata, CD_SCULPT_FACE_SETS, CD_CONSTRUCT, nullptr, mesh->totpoly));
 
   /* Initialize the new Face Set data-layer with a default valid visible ID and set the default
    * color to render it white. */
@@ -1917,7 +1917,7 @@ void BKE_sculpt_color_layer_create_if_needed(Object *object)
     return;
   }
 
-  CustomData_add_layer(&orig_me->vdata, CD_PROP_COLOR, CD_DEFAULT, nullptr, orig_me->totvert);
+  CustomData_add_layer(&orig_me->vdata, CD_PROP_COLOR, CD_CONSTRUCT, nullptr, orig_me->totvert);
   CustomDataLayer *layer = orig_me->vdata.layers +
                            CustomData_get_layer_index(&orig_me->vdata, CD_PROP_COLOR);
 
@@ -1958,8 +1958,8 @@ int BKE_sculpt_mask_layers_ensure(Object *ob, MultiresModifierData *mmd)
     int gridarea = gridsize * gridsize;
     int i, j;
 
-    gmask = static_cast<GridPaintMask *>(
-        CustomData_add_layer(&me->ldata, CD_GRID_PAINT_MASK, CD_CALLOC, nullptr, me->totloop));
+    gmask = static_cast<GridPaintMask *>(CustomData_add_layer(
+        &me->ldata, CD_GRID_PAINT_MASK, CD_SET_DEFAULT, nullptr, me->totloop));
 
     for (i = 0; i < me->totloop; i++) {
       GridPaintMask *gpm = &gmask[i];
@@ -2002,7 +2002,7 @@ int BKE_sculpt_mask_layers_ensure(Object *ob, MultiresModifierData *mmd)
 
   /* create vertex paint mask layer if there isn't one already */
   if (!paint_mask) {
-    CustomData_add_layer(&me->vdata, CD_PAINT_MASK, CD_CALLOC, nullptr, me->totvert);
+    CustomData_add_layer(&me->vdata, CD_PAINT_MASK, CD_SET_DEFAULT, nullptr, me->totvert);
     ret |= SCULPT_MASK_LAYER_CALC_VERT;
   }
 
@@ -2078,7 +2078,7 @@ void BKE_sculpt_face_sets_ensure_from_base_mesh_visibility(Mesh *mesh)
   else {
     initialize_new_face_sets = true;
     int *new_face_sets = static_cast<int *>(CustomData_add_layer(
-        &mesh->pdata, CD_SCULPT_FACE_SETS, CD_CALLOC, nullptr, mesh->totpoly));
+        &mesh->pdata, CD_SCULPT_FACE_SETS, CD_CONSTRUCT, nullptr, mesh->totpoly));
 
     /* Initialize the new Face Set data-layer with a default valid visible ID and set the default
      * color to render it white. */
diff --git a/source/blender/blenkernel/intern/particle_system.c b/source/blender/blenkernel/intern/particle_system.c
index abecb9f8d9d..254cea0bd8b 100644
--- a/source/blender/blenkernel/intern/particle_system.c
+++ b/source/blender/blenkernel/intern/particle_system.c
@@ -3322,7 +3322,7 @@ static void hair_create_input_mesh(ParticleSimulationData *sim,
   mesh = *r_mesh;
   if (!mesh) {
     *r_mesh = mesh = BKE_mesh_new_nomain(totpoint, totedge, 0, 0, 0);
-    CustomData_add_layer(&mesh->vdata, CD_MDEFORMVERT, CD_CALLOC, NULL, mesh->totvert);
+    CustomData_add_layer(&mesh->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, mesh->totvert);
     BKE_mesh_update_customdata_pointers(mesh, false);
   }
   mvert = mesh->mvert;
diff --git a/source/blender/blenkernel/intern/pbvh.c b/source/blender/blenkernel/intern/pbvh.c
index e2e8dedbd06..1c6274ef35e 100644
--- a/source/blender/blenkernel/intern/pbvh.c
+++ b/source/blender/blenkernel/intern/pbvh.c
@@ -3230,7 +3230,7 @@ bool *BKE_pbvh_get_vert_hide_for_write(PBVH *pbvh)
     return pbvh->hide_vert;
   }
   pbvh->hide_vert = (bool *)CustomData_add_layer_named(
-      &pbvh->mesh->vdata, CD_PROP_BOOL, CD_CALLOC, NULL, pbvh->mesh->totvert, ".hide_vert");
+      &pbvh->mesh->vdata, CD_PROP_BOOL, CD_SET_DEFAULT, NULL, pbvh->mesh->totvert, ".hide_vert");
   return pbvh->hide_vert;
 }
 
diff --git a/source/blender/blenkernel/intern/pointcloud.cc b/source/blender/blenkernel/intern/pointcloud.cc
index 426ad797cef..14ca3f58db9 100644
--- a/source/blender/blenkernel/intern/pointcloud.cc
+++ b/source/blender/blenkernel/intern/pointcloud.cc
@@ -64,7 +64,7 @@ static void pointcloud_init_data(ID *id)
   CustomData_reset(&pointcloud->pdata);
   CustomData_add_layer_named(&pointcloud->pdata,
                              CD_PROP_FLOAT3,
-                             CD_CALLOC,
+                             CD_SET_DEFAULT,
                              nullptr,
                              pointcloud->totpoint,
                              POINTCLOUD_ATTR_POSITION);
@@ -228,13 +228,6 @@ void *BKE_pointcloud_add_default(Main *bmain, const char *name)
   PointCloud *pointcloud = static_cast<PointCloud *>(BKE_libblock_alloc(bmain, ID_PT, name, 0));
 
   pointcloud_init_data(&pointcloud->id);
-
-  CustomData_add_layer_named(&pointcloud->pdata,
-                             CD_PROP_FLOAT,
-                             CD_CALLOC,
-                             nullptr,
-                             pointcloud->totpoint,
-                             POINTCLOUD_ATTR_RADIUS);
   pointcloud_random(pointcloud);
 
   return pointcloud;
@@ -251,7 +244,7 @@ PointCloud *BKE_pointcloud_new_nomain(const int totpoint)
 
   CustomData_add_layer_named(&pointcloud->pdata,
                              CD_PROP_FLOAT,
-                             CD_CALLOC,
+                             CD_SET_DEFAULT,
                              nullptr,
                              pointcloud->totpoint,
                              POINTCLOUD_ATTR_RADIUS);
@@ -325,22 +318,6 @@ bool BKE_pointcloud_customdata_required(const PointCloud *UNUSED(pointcloud), co
 
 /* Dependency Graph */
 
-PointCloud *BKE_pointcloud_new_for_eval(const PointCloud *pointcloud_src, int totpoint)
-{
-  PointCloud *pointcloud_dst = static_cast<PointCloud *>(BKE_id_new_nomain(ID_PT, nullptr));
-  CustomData_free(&pointcloud_dst->pdata, pointcloud_dst->totpoint);
-
-  STRNCPY(pointcloud_dst->id.name, pointcloud_src->id.name);
-  pointcloud_dst->mat = static_cast<Material **>(MEM_dupallocN(pointcloud_src->mat));
-  pointcloud_dst->totcol = pointcloud_src->totcol;
-
-  pointcloud_dst->totpoint = totpoint;
-  CustomData_copy(
-      &pointcloud_src->pdata, &pointcloud_dst->pdata, CD_MASK_ALL, CD_CALLOC, totpoint);
-
-  return pointcloud_dst;
-}
-
 PointCloud *BKE_pointcloud_copy_for_eval(struct PointCloud *pointcloud_src, bool reference)
 {
   int flags = LIB_ID_COPY_LOCALIZE;
diff --git a/source/blender/blenkernel/intern/subdiv_mesh.cc b/source/blender/blenkernel/intern/subdiv_mesh.cc
index e026a013498..da22ee6fd47 100644
--- a/source/blender/blenkernel/intern/subdiv_mesh.cc
+++ b/source/blender/blenkernel/intern/subdiv_mesh.cc
@@ -186,7 +186,7 @@ static void vertex_interpolation_init(const SubdivMeshContext *ctx,
     CustomData_copy(&ctx->coarse_mesh->vdata,
                     &vertex_interpolation->vertex_data_storage,
                     CD_MASK_EVERYTHING.vmask,
-                    CD_CALLOC,
+                    CD_SET_DEFAULT,
                     4);
     /* Initialize indices. */
     vertex_interpolation->vertex_indices[0] = 0;
@@ -321,7 +321,7 @@ static void loop_interpolation_init(const SubdivMeshContext *ctx,
     CustomData_copy(&ctx->coarse_mesh->ldata,
                     &loop_interpolation->loop_data_storage,
                     CD_MASK_EVERYTHING.lmask,
-                    CD_CALLOC,
+                    CD_SET_DEFAULT,
                     4);
     /* Initialize indices. */
     loop_interpolation->loop_indices[0] = 0;
diff --git a/source/blender/blenkernel/intern/subsurf_ccg.c b/source/blender/blenkernel/intern/subsurf_ccg.c
index 1dbfd73b958..52df555090f 100644
--- a/source/blender/blenkernel/intern/subsurf_ccg.c
+++ b/source/blender/blenkernel/intern/subsurf_ccg.c
@@ -1246,7 +1246,7 @@ static void *ccgDM_get_vert_data_layer(DerivedMesh *dm, int type)
     BLI_rw_mutex_lock(&ccgdm->origindex_cache_rwlock, THREAD_LOCK_WRITE);
 
     origindex = CustomData_add_layer(
-        &dm->vertData, CD_ORIGINDEX, CD_CALLOC, NULL, dm->numVertData);
+        &dm->vertData, CD_ORIGINDEX, CD_SET_DEFAULT, NULL, dm->numVertData);
 
     totorig = ccgSubSurf_getNumVerts(ss);
     totnone = dm->numVertData - totorig;
@@ -1285,7 +1285,7 @@ static void *ccgDM_get_edge_data_layer(DerivedMesh *dm, int type)
     }
 
     origindex = CustomData_add_layer(
-        &dm->edgeData, CD_ORIGINDEX, CD_CALLOC, NULL, dm->numEdgeData);
+        &dm->edgeData, CD_ORIGINDEX, CD_SET_DEFAULT, NULL, dm->numEdgeData);
 
     totedge = ccgSubSurf_getNumEdges(ss);
     totorig = totedge * (edgeSize - 1);
@@ -1328,7 +1328,7 @@ static void *ccgDM_get_poly_data_layer(DerivedMesh *dm, int type)
     }
 
     origindex = CustomData_add_layer(
-        &dm->polyData, CD_ORIGINDEX, CD_CALLOC, NULL, dm->numPolyData);
+        &dm->polyData, CD_ORIGINDEX, CD_SET_DEFAULT, NULL, dm->numPolyData);
 
     totface = ccgSubSurf_getNumFaces(ss);
 
diff --git a/source/blender/blenlib/BLI_multi_value_map.hh b/source/blender/blenlib/BLI_multi_value_map.hh
index 4b6300c09aa..1fc5a797574 100644
--- a/source/blender/blenlib/BLI_multi_value_map.hh
+++ b/source/blender/blenlib/BLI_multi_value_map.hh
@@ -137,6 +137,11 @@ template<typename Key, typename Value> class MultiValueMap {
   {
     return map_.values();
   }
+
+  void clear()
+  {
+    map_.clear();
+  }
 };
 
 }  // namespace blender
diff --git a/source/blender/blenlib/intern/BLI_memarena.c b/source/blender/blenlib/intern/BLI_memarena.c
index 3b73a81012d..ada2d27f9b2 100644
--- a/source/blender/blenlib/intern/BLI_memarena.c
+++ b/source/blender/blenlib/intern/BLI_memarena.c
@@ -158,6 +158,7 @@ void *BLI_memarena_calloc(MemArena *ma, size_t size)
   BLI_assert(ma->use_calloc == false);
 
   ptr = BLI_memarena_alloc(ma, size);
+  BLI_assert(ptr != NULL);
   memset(ptr, 0, size);
 
   return ptr;
diff --git a/source/blender/blenlib/intern/winstuff.c b/source/blender/blenlib/intern/winstuff.c
index e90a0ee02db..7e2c5e8f1dd 100644
--- a/source/blender/blenlib/intern/winstuff.c
+++ b/source/blender/blenlib/intern/winstuff.c
@@ -63,23 +63,17 @@ bool BLI_windows_register_blend_extension(const bool background)
   char buffer[256];
 
   char BlPath[MAX_PATH];
-  char InstallDir[FILE_MAXDIR];
-  char SysDir[FILE_MAXDIR];
-  const char *ThumbHandlerDLL;
-  char RegCmd[MAX_PATH * 2];
   char MBox[256];
-  char *blender_app;
-#  ifndef _WIN64
-  BOOL IsWOW64;
-#  endif
 
   printf("Registering file extension...");
   GetModuleFileName(0, BlPath, MAX_PATH);
 
   /* Replace the actual app name with the wrapper. */
-  blender_app = strstr(BlPath, "blender.exe");
-  if (blender_app != NULL) {
-    strcpy(blender_app, "blender-launcher.exe");
+  {
+    char *blender_app = strstr(BlPath, "blender.exe");
+    if (blender_app != NULL) {
+      strcpy(blender_app, "blender-launcher.exe");
+    }
   }
 
   /* root is HKLM by default */
@@ -157,12 +151,17 @@ bool BLI_windows_register_blend_extension(const bool background)
   }
 
 #  ifdef WITH_BLENDER_THUMBNAILER
-  BLI_windows_get_executable_dir(InstallDir);
-  GetSystemDirectory(SysDir, FILE_MAXDIR);
-  ThumbHandlerDLL = "BlendThumb.dll";
-  snprintf(
-      RegCmd, MAX_PATH * 2, "%s\\regsvr32 /s \"%s\\%s\"", SysDir, InstallDir, ThumbHandlerDLL);
-  system(RegCmd);
+  {
+    char RegCmd[MAX_PATH * 2];
+    char InstallDir[FILE_MAXDIR];
+    char SysDir[FILE_MAXDIR];
+    BLI_windows_get_executable_dir(InstallDir);
+    GetSystemDirectory(SysDir, FILE_MAXDIR);
+    const char *ThumbHandlerDLL = "BlendThumb.dll";
+    snprintf(
+        RegCmd, MAX_PATH * 2, "%s\\regsvr32 /s \"%s\\%s\"", SysDir, InstallDir, ThumbHandlerDLL);
+    system(RegCmd);
+  }
 #  endif
 
   RegCloseKey(root);
diff --git a/source/blender/blenloader/intern/versioning_300.c b/source/blender/blenloader/intern/versioning_300.c
index b98f8996a2c..4d604fc7eec 100644
--- a/source/blender/blenloader/intern/versioning_300.c
+++ b/source/blender/blenloader/intern/versioning_300.c
@@ -1697,6 +1697,27 @@ static void versioning_replace_legacy_combined_and_separate_color_nodes(bNodeTre
   }
 }
 
+static void versioning_replace_legacy_mix_rgb_node(bNodeTree *ntree)
+{
+  version_node_input_socket_name(ntree, SH_NODE_MIX_RGB_LEGACY, "Fac", "Factor_Float");
+  version_node_input_socket_name(ntree, SH_NODE_MIX_RGB_LEGACY, "Color1", "A_Color");
+  version_node_input_socket_name(ntree, SH_NODE_MIX_RGB_LEGACY, "Color2", "B_Color");
+  version_node_output_socket_name(ntree, SH_NODE_MIX_RGB_LEGACY, "Color", "Result_Color");
+  LISTBASE_FOREACH (bNode *, node, &ntree->nodes) {
+    if (node->type == SH_NODE_MIX_RGB_LEGACY) {
+      strcpy(node->idname, "ShaderNodeMix");
+      node->type = SH_NODE_MIX;
+      NodeShaderMix *data = (NodeShaderMix *)MEM_callocN(sizeof(NodeShaderMix), __func__);
+      data->blend_type = node->custom1;
+      data->clamp_result = node->custom2;
+      data->clamp_factor = 1;
+      data->data_type = SOCK_RGBA;
+      data->factor_mode = NODE_MIX_MODE_UNIFORM;
+      node->storage = data;
+    }
+  }
+}
+
 static void version_fix_image_format_copy(Main *bmain, ImageFormatData *format)
 {
   /* Fix bug where curves in image format were not properly copied to file output
@@ -3332,5 +3353,13 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
         }
       }
     }
+
+    /* Convert mix rgb node to new mix node and add storage. */
+    {
+      FOREACH_NODETREE_BEGIN (bmain, ntree, id) {
+        versioning_replace_legacy_mix_rgb_node(ntree);
+      }
+      FOREACH_NODETREE_END;
+    }
   }
 }
diff --git a/source/blender/blenloader/intern/versioning_legacy.c b/source/blender/blenloader/intern/versioning_legacy.c
index 75cc333e4b5..20659daabd6 100644
--- a/source/blender/blenloader/intern/versioning_legacy.c
+++ b/source/blender/blenloader/intern/versioning_legacy.c
@@ -291,8 +291,8 @@ static void customdata_version_242(Mesh *me)
         MEM_freeN(me->mcol);
       }
 
-      me->mcol = CustomData_add_layer(&me->fdata, CD_MCOL, CD_CALLOC, NULL, me->totface);
-      me->mtface = CustomData_add_layer(&me->fdata, CD_MTFACE, CD_CALLOC, NULL, me->totface);
+      me->mcol = CustomData_add_layer(&me->fdata, CD_MCOL, CD_SET_DEFAULT, NULL, me->totface);
+      me->mtface = CustomData_add_layer(&me->fdata, CD_MTFACE, CD_SET_DEFAULT, NULL, me->totface);
 
       mtf = me->mtface;
       mcol = me->mcol;
diff --git a/source/blender/bmesh/intern/bmesh_construct.c b/source/blender/bmesh/intern/bmesh_construct.c
index 0ee5545527b..757d006b04d 100644
--- a/source/blender/bmesh/intern/bmesh_construct.c
+++ b/source/blender/bmesh/intern/bmesh_construct.c
@@ -513,23 +513,23 @@ void BM_mesh_copy_init_customdata_from_mesh_array(BMesh *bm_dst,
     const Mesh *me_src = me_src_array[i];
     if (i == 0) {
       CustomData_copy_mesh_to_bmesh(
-          &me_src->vdata, &bm_dst->vdata, CD_MASK_BMESH.vmask, CD_CALLOC, 0);
+          &me_src->vdata, &bm_dst->vdata, CD_MASK_BMESH.vmask, CD_SET_DEFAULT, 0);
       CustomData_copy_mesh_to_bmesh(
-          &me_src->edata, &bm_dst->edata, CD_MASK_BMESH.emask, CD_CALLOC, 0);
+          &me_src->edata, &bm_dst->edata, CD_MASK_BMESH.emask, CD_SET_DEFAULT, 0);
       CustomData_copy_mesh_to_bmesh(
-          &me_src->ldata, &bm_dst->ldata, CD_MASK_BMESH.lmask, CD_CALLOC, 0);
+          &me_src->ldata, &bm_dst->ldata, CD_MASK_BMESH.lmask, CD_SET_DEFAULT, 0);
       CustomData_copy_mesh_to_bmesh(
-          &me_src->pdata, &bm_dst->pdata, CD_MASK_BMESH.pmask, CD_CALLOC, 0);
+          &me_src->pdata, &bm_dst->pdata, CD_MASK_BMESH.pmask, CD_SET_DEFAULT, 0);
     }
     else {
       CustomData_merge_mesh_to_bmesh(
-          &me_src->vdata, &bm_dst->vdata, CD_MASK_BMESH.vmask, CD_CALLOC, 0);
+          &me_src->vdata, &bm_dst->vdata, CD_MASK_BMESH.vmask, CD_SET_DEFAULT, 0);
       CustomData_merge_mesh_to_bmesh(
-          &me_src->edata, &bm_dst->edata, CD_MASK_BMESH.emask, CD_CALLOC, 0);
+          &me_src->edata, &bm_dst->edata, CD_MASK_BMESH.emask, CD_SET_DEFAULT, 0);
       CustomData_merge_mesh_to_bmesh(
-          &me_src->ldata, &bm_dst->ldata, CD_MASK_BMESH.lmask, CD_CALLOC, 0);
+          &me_src->ldata, &bm_dst->ldata, CD_MASK_BMESH.lmask, CD_SET_DEFAULT, 0);
       CustomData_merge_mesh_to_bmesh(
-          &me_src->pdata, &bm_dst->pdata, CD_MASK_BMESH.pmask, CD_CALLOC, 0);
+          &me_src->pdata, &bm_dst->pdata, CD_MASK_BMESH.pmask, CD_SET_DEFAULT, 0);
     }
 
     cd_flag |= me_src->cd_flag;
@@ -558,10 +558,10 @@ void BM_mesh_copy_init_customdata(BMesh *bm_dst, BMesh *bm_src, const BMAllocTem
     allocsize = &bm_mesh_allocsize_default;
   }
 
-  CustomData_copy(&bm_src->vdata, &bm_dst->vdata, CD_MASK_BMESH.vmask, CD_CALLOC, 0);
-  CustomData_copy(&bm_src->edata, &bm_dst->edata, CD_MASK_BMESH.emask, CD_CALLOC, 0);
-  CustomData_copy(&bm_src->ldata, &bm_dst->ldata, CD_MASK_BMESH.lmask, CD_CALLOC, 0);
-  CustomData_copy(&bm_src->pdata, &bm_dst->pdata, CD_MASK_BMESH.pmask, CD_CALLOC, 0);
+  CustomData_copy(&bm_src->vdata, &bm_dst->vdata, CD_MASK_BMESH.vmask, CD_SET_DEFAULT, 0);
+  CustomData_copy(&bm_src->edata, &bm_dst->edata, CD_MASK_BMESH.emask, CD_SET_DEFAULT, 0);
+  CustomData_copy(&bm_src->ldata, &bm_dst->ldata, CD_MASK_BMESH.lmask, CD_SET_DEFAULT, 0);
+  CustomData_copy(&bm_src->pdata, &bm_dst->pdata, CD_MASK_BMESH.pmask, CD_SET_DEFAULT, 0);
 
   CustomData_bmesh_init_pool(&bm_dst->vdata, allocsize->totvert, BM_VERT);
   CustomData_bmesh_init_pool(&bm_dst->edata, allocsize->totedge, BM_EDGE);
@@ -596,7 +596,7 @@ void BM_mesh_copy_init_customdata_all_layers(BMesh *bm_dst,
 
     for (int l = 0; l < src->totlayer; l++) {
       CustomData_add_layer_named(
-          dst, src->layers[l].type, CD_CALLOC, NULL, 0, src->layers[l].name);
+          dst, src->layers[l].type, CD_SET_DEFAULT, NULL, 0, src->layers[l].name);
     }
     CustomData_bmesh_init_pool(dst, size, htypes[i]);
   }
diff --git a/source/blender/bmesh/intern/bmesh_interp.c b/source/blender/bmesh/intern/bmesh_interp.c
index 0c3db31dd1f..b7028dee5e1 100644
--- a/source/blender/bmesh/intern/bmesh_interp.c
+++ b/source/blender/bmesh/intern/bmesh_interp.c
@@ -846,7 +846,7 @@ void BM_data_layer_add(BMesh *bm, CustomData *data, int type)
   /* the pool is now owned by olddata and must not be shared */
   data->pool = NULL;
 
-  CustomData_add_layer(data, type, CD_DEFAULT, NULL, 0);
+  CustomData_add_layer(data, type, CD_SET_DEFAULT, NULL, 0);
 
   update_data_blocks(bm, &olddata, data);
   if (olddata.layers) {
@@ -864,7 +864,7 @@ void BM_data_layer_add_named(BMesh *bm, CustomData *data, int type, const char *
   /* the pool is now owned by olddata and must not be shared */
   data->pool = NULL;
 
-  CustomData_add_layer_named(data, type, CD_DEFAULT, NULL, 0, name);
+  CustomData_add_layer_named(data, type, CD_SET_DEFAULT, NULL, 0, name);
 
   update_data_blocks(bm, &olddata, data);
   if (olddata.layers) {
diff --git a/source/blender/bmesh/intern/bmesh_mesh_convert.cc b/source/blender/bmesh/intern/bmesh_mesh_convert.cc
index f509eef2141..47ad5080451 100644
--- a/source/blender/bmesh/intern/bmesh_mesh_convert.cc
+++ b/source/blender/bmesh/intern/bmesh_mesh_convert.cc
@@ -217,10 +217,10 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar
 
   if (!me || !me->totvert) {
     if (me && is_new) { /* No verts? still copy custom-data layout. */
-      CustomData_copy_mesh_to_bmesh(&me->vdata, &bm->vdata, mask.vmask, CD_DEFAULT, 0);
-      CustomData_copy_mesh_to_bmesh(&me->edata, &bm->edata, mask.emask, CD_DEFAULT, 0);
-      CustomData_copy_mesh_to_bmesh(&me->ldata, &bm->ldata, mask.lmask, CD_DEFAULT, 0);
-      CustomData_copy_mesh_to_bmesh(&me->pdata, &bm->pdata, mask.pmask, CD_DEFAULT, 0);
+      CustomData_copy_mesh_to_bmesh(&me->vdata, &bm->vdata, mask.vmask, CD_CONSTRUCT, 0);
+      CustomData_copy_mesh_to_bmesh(&me->edata, &bm->edata, mask.emask, CD_CONSTRUCT, 0);
+      CustomData_copy_mesh_to_bmesh(&me->ldata, &bm->ldata, mask.lmask, CD_CONSTRUCT, 0);
+      CustomData_copy_mesh_to_bmesh(&me->pdata, &bm->pdata, mask.pmask, CD_CONSTRUCT, 0);
 
       CustomData_bmesh_init_pool(&bm->vdata, me->totvert, BM_VERT);
       CustomData_bmesh_init_pool(&bm->edata, me->totedge, BM_EDGE);
@@ -236,16 +236,16 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar
   }
 
   if (is_new) {
-    CustomData_copy_mesh_to_bmesh(&me->vdata, &bm->vdata, mask.vmask, CD_CALLOC, 0);
-    CustomData_copy_mesh_to_bmesh(&me->edata, &bm->edata, mask.emask, CD_CALLOC, 0);
-    CustomData_copy_mesh_to_bmesh(&me->ldata, &bm->ldata, mask.lmask, CD_CALLOC, 0);
-    CustomData_copy_mesh_to_bmesh(&me->pdata, &bm->pdata, mask.pmask, CD_CALLOC, 0);
+    CustomData_copy_mesh_to_bmesh(&me->vdata, &bm->vdata, mask.vmask, CD_SET_DEFAULT, 0);
+    CustomData_copy_mesh_to_bmesh(&me->edata, &bm->edata, mask.emask, CD_SET_DEFAULT, 0);
+    CustomData_copy_mesh_to_bmesh(&me->ldata, &bm->ldata, mask.lmask, CD_SET_DEFAULT, 0);
+    CustomData_copy_mesh_to_bmesh(&me->pdata, &bm->pdata, mask.pmask, CD_SET_DEFAULT, 0);
   }
   else {
-    CustomData_bmesh_merge(&me->vdata, &bm->vdata, mask.vmask, CD_CALLOC, bm, BM_VERT);
-    CustomData_bmesh_merge(&me->edata, &bm->edata, mask.emask, CD_CALLOC, bm, BM_EDGE);
-    CustomData_bmesh_merge(&me->ldata, &bm->ldata, mask.lmask, CD_CALLOC, bm, BM_LOOP);
-    CustomData_bmesh_merge(&me->pdata, &bm->pdata, mask.pmask, CD_CALLOC, bm, BM_FACE);
+    CustomData_bmesh_merge(&me->vdata, &bm->vdata, mask.vmask, CD_SET_DEFAULT, bm, BM_VERT);
+    CustomData_bmesh_merge(&me->edata, &bm->edata, mask.emask, CD_SET_DEFAULT, bm, BM_EDGE);
+    CustomData_bmesh_merge(&me->ldata, &bm->ldata, mask.lmask, CD_SET_DEFAULT, bm, BM_LOOP);
+    CustomData_bmesh_merge(&me->pdata, &bm->pdata, mask.pmask, CD_SET_DEFAULT, bm, BM_FACE);
   }
 
   /* -------------------------------------------------------------------- */
@@ -1018,10 +1018,10 @@ void BM_mesh_bm_to_me(Main *bmain, BMesh *bm, Mesh *me, const struct BMeshToMesh
   {
     CustomData_MeshMasks mask = CD_MASK_MESH;
     CustomData_MeshMasks_update(&mask, &params->cd_mask_extra);
-    CustomData_copy_mesh_to_bmesh(&bm->vdata, &me->vdata, mask.vmask, CD_CALLOC, me->totvert);
-    CustomData_copy_mesh_to_bmesh(&bm->edata, &me->edata, mask.emask, CD_CALLOC, me->totedge);
-    CustomData_copy_mesh_to_bmesh(&bm->ldata, &me->ldata, mask.lmask, CD_CALLOC, me->totloop);
-    CustomData_copy_mesh_to_bmesh(&bm->pdata, &me->pdata, mask.pmask, CD_CALLOC, me->totpoly);
+    CustomData_copy_mesh_to_bmesh(&bm->vdata, &me->vdata, mask.vmask, CD_SET_DEFAULT, me->totvert);
+    CustomData_copy_mesh_to_bmesh(&bm->edata, &me->edata, mask.emask, CD_SET_DEFAULT, me->totedge);
+    CustomData_copy_mesh_to_bmesh(&bm->ldata, &me->ldata, mask.lmask, CD_SET_DEFAULT, me->totloop);
+    CustomData_copy_mesh_to_bmesh(&bm->pdata, &me->pdata, mask.pmask, CD_SET_DEFAULT, me->totpoly);
   }
 
   MVert *mvert = bm->totvert ? (MVert *)MEM_callocN(sizeof(MVert) * bm->totvert, "bm_to_me.vert") :
@@ -1286,10 +1286,10 @@ void BM_mesh_bm_to_me_for_eval(BMesh *bm, Mesh *me, const CustomData_MeshMasks *
   me->totloop = bm->totloop;
   me->totpoly = bm->totface;
 
-  CustomData_add_layer(&me->vdata, CD_MVERT, CD_CALLOC, nullptr, bm->totvert);
-  CustomData_add_layer(&me->edata, CD_MEDGE, CD_CALLOC, nullptr, bm->totedge);
-  CustomData_add_layer(&me->ldata, CD_MLOOP, CD_CALLOC, nullptr, bm->totloop);
-  CustomData_add_layer(&me->pdata, CD_MPOLY, CD_CALLOC, nullptr, bm->totface);
+  CustomData_add_layer(&me->vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, bm->totvert);
+  CustomData_add_layer(&me->edata, CD_MEDGE, CD_SET_DEFAULT, nullptr, bm->totedge);
+  CustomData_add_layer(&me->ldata, CD_MLOOP, CD_SET_DEFAULT, nullptr, bm->totloop);
+  CustomData_add_layer(&me->pdata, CD_MPOLY, CD_SET_DEFAULT, nullptr, bm->totface);
 
   /* Don't process shape-keys, we only feed them through the modifier stack as needed,
    * e.g. for applying modifiers or the like. */
@@ -1298,10 +1298,10 @@ void BM_mesh_bm_to_me_for_eval(BMesh *bm, Mesh *me, const CustomData_MeshMasks *
     CustomData_MeshMasks_update(&mask, cd_mask_extra);
   }
   mask.vmask &= ~CD_MASK_SHAPEKEY;
-  CustomData_merge(&bm->vdata, &me->vdata, mask.vmask, CD_CALLOC, me->totvert);
-  CustomData_merge(&bm->edata, &me->edata, mask.emask, CD_CALLOC, me->totedge);
-  CustomData_merge(&bm->ldata, &me->ldata, mask.lmask, CD_CALLOC, me->totloop);
-  CustomData_merge(&bm->pdata, &me->pdata, mask.pmask, CD_CALLOC, me->totpoly);
+  CustomData_merge(&bm->vdata, &me->vdata, mask.vmask, CD_SET_DEFAULT, me->totvert);
+  CustomData_merge(&bm->edata, &me->edata, mask.emask, CD_SET_DEFAULT, me->totedge);
+  CustomData_merge(&bm->ldata, &me->ldata, mask.lmask, CD_SET_DEFAULT, me->totloop);
+  CustomData_merge(&bm->pdata, &me->pdata, mask.pmask, CD_SET_DEFAULT, me->totpoly);
 
   BKE_mesh_update_customdata_pointers(me, false);
 
diff --git a/source/blender/compositor/realtime_compositor/COM_evaluator.hh b/source/blender/compositor/realtime_compositor/COM_evaluator.hh
index fd6feb0948b..258a2a038c4 100644
--- a/source/blender/compositor/realtime_compositor/COM_evaluator.hh
+++ b/source/blender/compositor/realtime_compositor/COM_evaluator.hh
@@ -104,9 +104,6 @@ class Evaluator {
   Context &context_;
   /* A reference to the compositor node tree. */
   bNodeTree &node_tree_;
-  /* The derived and reference node trees representing the compositor node tree. Those are
-   * initialized when the node tree is compiled and freed when the evaluator resets. */
-  NodeTreeRefMap node_tree_reference_map_;
   std::unique_ptr<DerivedNodeTree> derived_node_tree_;
   /* The compiled operations stream. This contains ordered pointers to the operations that were
    * compiled. This is initialized when the node tree is compiled and freed when the evaluator
diff --git a/source/blender/compositor/realtime_compositor/COM_utilities.hh b/source/blender/compositor/realtime_compositor/COM_utilities.hh
index 4bd61aab5cb..614384bd573 100644
--- a/source/blender/compositor/realtime_compositor/COM_utilities.hh
+++ b/source/blender/compositor/realtime_compositor/COM_utilities.hh
@@ -27,7 +27,7 @@ DSocket get_input_origin_socket(DInputSocket input);
 DOutputSocket get_output_linked_to_input(DInputSocket input);
 
 /* Get the result type that corresponds to the type of the given socket. */
-ResultType get_node_socket_result_type(const SocketRef *socket);
+ResultType get_node_socket_result_type(const bNodeSocket *socket);
 
 /* Returns true if any of the nodes linked to the given output satisfies the given condition, and
  * false otherwise.  */
@@ -46,7 +46,7 @@ bool is_shader_node(DNode node);
 bool is_node_supported(DNode node);
 
 /* Get the input descriptor of the given input socket. */
-InputDescriptor input_descriptor_from_input_socket(const InputSocketRef *socket);
+InputDescriptor input_descriptor_from_input_socket(const bNodeSocket *socket);
 
 /* Dispatch the given compute shader in a 2D compute space such that the number of threads in both
  * dimensions is as small as possible but at least covers the entirety of threads_range assuming
diff --git a/source/blender/compositor/realtime_compositor/intern/compile_state.cc b/source/blender/compositor/realtime_compositor/intern/compile_state.cc
index 5b485224111..97c1e47e86e 100644
--- a/source/blender/compositor/realtime_compositor/intern/compile_state.cc
+++ b/source/blender/compositor/realtime_compositor/intern/compile_state.cc
@@ -46,7 +46,7 @@ Result &CompileState::get_result_from_output_socket(DOutputSocket output)
    * reference to the result from that operation using the output identifier. */
   if (node_operations_.contains(output.node())) {
     NodeOperation *operation = node_operations_.lookup(output.node());
-    return operation->get_result(output->identifier());
+    return operation->get_result(output->identifier);
   }
 
   /* Otherwise, the output belongs to a node that was compiled into a shader operation, so
@@ -113,17 +113,17 @@ Domain CompileState::compute_shader_node_domain(DNode node)
 
   /* Go over the inputs and find the domain of the non single value input with the highest domain
    * priority. */
-  for (const InputSocketRef *input_ref : node->inputs()) {
-    const DInputSocket input{node.context(), input_ref};
+  for (const bNodeSocket *input : node->input_sockets()) {
+    const DInputSocket dinput{node.context(), input};
 
     /* Get the output linked to the input. If it is null, that means the input is unlinked, so skip
      * it. */
-    const DOutputSocket output = get_output_linked_to_input(input);
+    const DOutputSocket output = get_output_linked_to_input(dinput);
     if (!output) {
       continue;
     }
 
-    const InputDescriptor input_descriptor = input_descriptor_from_input_socket(input_ref);
+    const InputDescriptor input_descriptor = input_descriptor_from_input_socket(input);
 
     /* If the output belongs to a node that is part of the shader compile unit, then the domain of
      * the input is the domain of the compile unit itself. */
diff --git a/source/blender/compositor/realtime_compositor/intern/evaluator.cc b/source/blender/compositor/realtime_compositor/intern/evaluator.cc
index d358389f2e9..48457bec199 100644
--- a/source/blender/compositor/realtime_compositor/intern/evaluator.cc
+++ b/source/blender/compositor/realtime_compositor/intern/evaluator.cc
@@ -45,7 +45,6 @@ void Evaluator::reset()
 {
   operations_stream_.clear();
   derived_node_tree_.reset();
-  node_tree_reference_map_.clear();
 
   is_compiled_ = false;
 }
@@ -67,7 +66,7 @@ bool Evaluator::validate_node_tree()
 
 void Evaluator::compile_and_evaluate()
 {
-  derived_node_tree_ = std::make_unique<DerivedNodeTree>(node_tree_, node_tree_reference_map_);
+  derived_node_tree_ = std::make_unique<DerivedNodeTree>(node_tree_);
 
   if (!validate_node_tree()) {
     return;
@@ -93,7 +92,7 @@ void Evaluator::compile_and_evaluate()
 
 void Evaluator::compile_and_evaluate_node(DNode node, CompileState &compile_state)
 {
-  NodeOperation *operation = node->typeinfo()->get_compositor_operation(context_, node);
+  NodeOperation *operation = node->typeinfo->get_compositor_operation(context_, node);
 
   compile_state.map_node_to_node_operation(node, operation);
 
@@ -113,16 +112,16 @@ void Evaluator::map_node_operation_inputs_to_their_results(DNode node,
                                                            NodeOperation *operation,
                                                            CompileState &compile_state)
 {
-  for (const InputSocketRef *input_ref : node->inputs()) {
-    const DInputSocket input{node.context(), input_ref};
+  for (const bNodeSocket *input : node->input_sockets()) {
+    const DInputSocket dinput{node.context(), input};
 
-    DSocket origin = get_input_origin_socket(input);
+    DSocket dorigin = get_input_origin_socket(dinput);
 
     /* The origin socket is an output, which means the input is linked. So map the input to the
      * result we get from the output. */
-    if (origin->is_output()) {
-      Result &result = compile_state.get_result_from_output_socket(DOutputSocket(origin));
-      operation->map_input_to_result(input->identifier(), &result);
+    if (dorigin->is_output()) {
+      Result &result = compile_state.get_result_from_output_socket(DOutputSocket(dorigin));
+      operation->map_input_to_result(input->identifier, &result);
       continue;
     }
 
@@ -130,8 +129,8 @@ void Evaluator::map_node_operation_inputs_to_their_results(DNode node,
      * origin is the input socket itself or the input is connected to an unlinked input of a group
      * input node and the origin is the input of the group input node. So map the input to the
      * result of a newly created Input Single Value Operation. */
-    auto *input_operation = new InputSingleValueOperation(context_, DInputSocket(origin));
-    operation->map_input_to_result(input->identifier(), &input_operation->get_result());
+    auto *input_operation = new InputSingleValueOperation(context_, DInputSocket(dorigin));
+    operation->map_input_to_result(input->identifier, &input_operation->get_result());
 
     operations_stream_.append(std::unique_ptr<InputSingleValueOperation>(input_operation));
 
diff --git a/source/blender/compositor/realtime_compositor/intern/input_single_value_operation.cc b/source/blender/compositor/realtime_compositor/intern/input_single_value_operation.cc
index 0bdd40e3636..b3cc86b5f79 100644
--- a/source/blender/compositor/realtime_compositor/intern/input_single_value_operation.cc
+++ b/source/blender/compositor/realtime_compositor/intern/input_single_value_operation.cc
@@ -14,7 +14,7 @@ const StringRef InputSingleValueOperation::output_identifier_ = StringRef("Outpu
 InputSingleValueOperation::InputSingleValueOperation(Context &context, DInputSocket input_socket)
     : Operation(context), input_socket_(input_socket)
 {
-  const ResultType result_type = get_node_socket_result_type(input_socket_.socket_ref());
+  const ResultType result_type = get_node_socket_result_type(input_socket_.bsocket());
   Result result = Result(result_type, texture_pool());
 
   /* The result of an input single value operation is guaranteed to have a single user. */
@@ -29,17 +29,19 @@ void InputSingleValueOperation::execute()
   Result &result = get_result();
   result.allocate_single_value();
 
+  const bNodeSocket *bsocket = input_socket_.bsocket();
+
   /* Set the value of the result to the default value of the input socket. */
   switch (result.type()) {
     case ResultType::Float:
-      result.set_float_value(input_socket_->default_value<bNodeSocketValueFloat>()->value);
+      result.set_float_value(bsocket->default_value_typed<bNodeSocketValueFloat>()->value);
       break;
     case ResultType::Vector:
       result.set_vector_value(
-          float3(input_socket_->default_value<bNodeSocketValueVector>()->value));
+          float3(bsocket->default_value_typed<bNodeSocketValueVector>()->value));
       break;
     case ResultType::Color:
-      result.set_color_value(float4(input_socket_->default_value<bNodeSocketValueRGBA>()->value));
+      result.set_color_value(float4(bsocket->default_value_typed<bNodeSocketValueRGBA>()->value));
       break;
   }
 }
diff --git a/source/blender/compositor/realtime_compositor/intern/node_operation.cc b/source/blender/compositor/realtime_compositor/intern/node_operation.cc
index f02d0906447..1c20c967ddb 100644
--- a/source/blender/compositor/realtime_compositor/intern/node_operation.cc
+++ b/source/blender/compositor/realtime_compositor/intern/node_operation.cc
@@ -25,27 +25,27 @@ using namespace nodes::derived_node_tree_types;
 
 NodeOperation::NodeOperation(Context &context, DNode node) : Operation(context), node_(node)
 {
-  for (const OutputSocketRef *output : node->outputs()) {
+  for (const bNodeSocket *output : node->output_sockets()) {
     const ResultType result_type = get_node_socket_result_type(output);
     const Result result = Result(result_type, texture_pool());
-    populate_result(output->identifier(), result);
+    populate_result(output->identifier, result);
   }
 
-  for (const InputSocketRef *input : node->inputs()) {
+  for (const bNodeSocket *input : node->input_sockets()) {
     const InputDescriptor input_descriptor = input_descriptor_from_input_socket(input);
-    declare_input_descriptor(input->identifier(), input_descriptor);
+    declare_input_descriptor(input->identifier, input_descriptor);
   }
 }
 
 void NodeOperation::compute_results_reference_counts(const Schedule &schedule)
 {
-  for (const OutputSocketRef *output_ref : node()->outputs()) {
-    const DOutputSocket output{node().context(), output_ref};
+  for (const bNodeSocket *output : this->node()->output_sockets()) {
+    const DOutputSocket doutput{node().context(), output};
 
     const int reference_count = number_of_inputs_linked_to_output_conditioned(
-        output, [&](DInputSocket input) { return schedule.contains(input.node()); });
+        doutput, [&](DInputSocket input) { return schedule.contains(input.node()); });
 
-    get_result(output->identifier()).set_initial_reference_count(reference_count);
+    get_result(doutput->identifier).set_initial_reference_count(reference_count);
   }
 }
 
@@ -56,7 +56,7 @@ const DNode &NodeOperation::node() const
 
 const bNode &NodeOperation::bnode() const
 {
-  return *node_->bnode();
+  return *node_;
 }
 
 bool NodeOperation::should_compute_output(StringRef identifier)
diff --git a/source/blender/compositor/realtime_compositor/intern/scheduler.cc b/source/blender/compositor/realtime_compositor/intern/scheduler.cc
index ce8b9330541..ac5cc55a73f 100644
--- a/source/blender/compositor/realtime_compositor/intern/scheduler.cc
+++ b/source/blender/compositor/realtime_compositor/intern/scheduler.cc
@@ -8,6 +8,8 @@
 
 #include "NOD_derived_node_tree.hh"
 
+#include "BKE_node_runtime.hh"
+
 #include "COM_scheduler.hh"
 #include "COM_utilities.hh"
 
@@ -21,22 +23,22 @@ using namespace nodes::derived_node_tree_types;
  * node will be returned. */
 static DNode compute_output_node(DerivedNodeTree &tree)
 {
-  const NodeTreeRef &root_tree = tree.root_context().tree();
+  const bNodeTree &root_tree = tree.root_context().btree();
 
-  for (const NodeRef *node : root_tree.nodes_by_type("CompositorNodeComposite")) {
-    if (node->bnode()->flag & NODE_DO_OUTPUT) {
+  for (const bNode *node : root_tree.nodes_by_type("CompositorNodeComposite")) {
+    if (node->flag & NODE_DO_OUTPUT) {
       return DNode(&tree.root_context(), node);
     }
   }
 
-  for (const NodeRef *node : root_tree.nodes_by_type("CompositorNodeViewer")) {
-    if (node->bnode()->flag & NODE_DO_OUTPUT) {
+  for (const bNode *node : root_tree.nodes_by_type("CompositorNodeViewer")) {
+    if (node->flag & NODE_DO_OUTPUT) {
       return DNode(&tree.root_context(), node);
     }
   }
 
-  for (const NodeRef *node : root_tree.nodes_by_type("CompositorNodeSplitViewer")) {
-    if (node->bnode()->flag & NODE_DO_OUTPUT) {
+  for (const bNode *node : root_tree.nodes_by_type("CompositorNodeSplitViewer")) {
+    if (node->flag & NODE_DO_OUTPUT) {
       return DNode(&tree.root_context(), node);
     }
   }
@@ -120,25 +122,25 @@ static NeededBuffers compute_number_of_needed_buffers(DNode output_node)
     /* Go over the node dependencies connected to the inputs of the node and push them to the node
      * stack if they were not computed already. */
     Set<DNode> pushed_nodes;
-    for (const InputSocketRef *input_ref : node->inputs()) {
-      const DInputSocket input{node.context(), input_ref};
+    for (const bNodeSocket *input : node->input_sockets()) {
+      const DInputSocket dinput{node.context(), input};
 
       /* Get the output linked to the input. If it is null, that means the input is unlinked and
        * has no dependency node. */
-      const DOutputSocket output = get_output_linked_to_input(input);
-      if (!output) {
+      const DOutputSocket doutput = get_output_linked_to_input(dinput);
+      if (!doutput) {
         continue;
       }
 
       /* The node dependency was already computed or pushed before, so skip it. */
-      if (needed_buffers.contains(output.node()) || pushed_nodes.contains(output.node())) {
+      if (needed_buffers.contains(doutput.node()) || pushed_nodes.contains(doutput.node())) {
         continue;
       }
 
       /* The output node needs to be computed, push the node dependency to the node stack and
        * indicate that it was pushed. */
-      node_stack.push(output.node());
-      pushed_nodes.add_new(output.node());
+      node_stack.push(doutput.node());
+      pushed_nodes.add_new(doutput.node());
     }
 
     /* If any of the node dependencies were pushed, that means that not all of them were computed
@@ -154,26 +156,26 @@ static NeededBuffers compute_number_of_needed_buffers(DNode output_node)
      * buffers needed to compute the most demanding of the node dependencies. */
     int number_of_input_buffers = 0;
     int buffers_needed_by_dependencies = 0;
-    for (const InputSocketRef *input_ref : node->inputs()) {
-      const DInputSocket input{node.context(), input_ref};
+    for (const bNodeSocket *input : node->input_sockets()) {
+      const DInputSocket dinput{node.context(), input};
 
       /* Get the output linked to the input. If it is null, that means the input is unlinked.
        * Unlinked inputs do not take a buffer, so skip those inputs. */
-      const DOutputSocket output = get_output_linked_to_input(input);
-      if (!output) {
+      const DOutputSocket doutput = get_output_linked_to_input(dinput);
+      if (!doutput) {
         continue;
       }
 
       /* Since this input is linked, if the link is not between two shader nodes, it means that the
        * node takes a buffer through this input and so we increment the number of input buffers. */
-      if (!is_shader_node(node) || !is_shader_node(output.node())) {
+      if (!is_shader_node(node) || !is_shader_node(doutput.node())) {
         number_of_input_buffers++;
       }
 
       /* If the number of buffers needed by the node dependency is more than the total number of
        * buffers needed by the dependencies, then update the latter to be the former. This is
        * computing the "d" in the aforementioned equation "max(n + m, d)". */
-      const int buffers_needed_by_dependency = needed_buffers.lookup(output.node());
+      const int buffers_needed_by_dependency = needed_buffers.lookup(doutput.node());
       if (buffers_needed_by_dependency > buffers_needed_by_dependencies) {
         buffers_needed_by_dependencies = buffers_needed_by_dependency;
       }
@@ -181,17 +183,18 @@ static NeededBuffers compute_number_of_needed_buffers(DNode output_node)
 
     /* Compute the number of buffers that will be computed/output by this node. */
     int number_of_output_buffers = 0;
-    for (const OutputSocketRef *output_ref : node->outputs()) {
-      const DOutputSocket output{node.context(), output_ref};
+    for (const bNodeSocket *output : node->output_sockets()) {
+      const DOutputSocket doutput{node.context(), output};
 
       /* The output is not linked, it outputs no buffer. */
-      if (output->logically_linked_sockets().is_empty()) {
+      if (!output->is_logically_linked()) {
         continue;
       }
 
       /* If any of the links is not between two shader nodes, it means that the node outputs
        * a buffer through this output and so we increment the number of output buffers. */
-      if (!is_output_linked_to_node_conditioned(output, is_shader_node) || !is_shader_node(node)) {
+      if (!is_output_linked_to_node_conditioned(doutput, is_shader_node) ||
+          !is_shader_node(node)) {
         number_of_output_buffers++;
       }
     }
@@ -255,24 +258,24 @@ Schedule compute_schedule(DerivedNodeTree &tree)
      * want the node with the highest number of needed buffers to be schedule first, but since
      * those are pushed to the traversal stack, we need to push them in reverse order. */
     Vector<DNode> sorted_dependency_nodes;
-    for (const InputSocketRef *input_ref : node->inputs()) {
-      const DInputSocket input{node.context(), input_ref};
+    for (const bNodeSocket *input : node->input_sockets()) {
+      const DInputSocket dinput{node.context(), input};
 
       /* Get the output linked to the input. If it is null, that means the input is unlinked and
        * has no dependency node, so skip it. */
-      const DOutputSocket output = get_output_linked_to_input(input);
-      if (!output) {
+      const DOutputSocket doutput = get_output_linked_to_input(dinput);
+      if (!doutput) {
         continue;
       }
 
       /* The dependency node was added before, so skip it. The number of dependency nodes is very
        * small, typically less than 3, so a linear search is okay. */
-      if (sorted_dependency_nodes.contains(output.node())) {
+      if (sorted_dependency_nodes.contains(doutput.node())) {
         continue;
       }
 
       /* The dependency node was already schedule, so skip it. */
-      if (schedule.contains(output.node())) {
+      if (schedule.contains(doutput.node())) {
         continue;
       }
 
@@ -280,7 +283,7 @@ Schedule compute_schedule(DerivedNodeTree &tree)
        * typically less than 3, so insertion sort is okay. */
       int insertion_position = 0;
       for (int i = 0; i < sorted_dependency_nodes.size(); i++) {
-        if (needed_buffers.lookup(output.node()) >
+        if (needed_buffers.lookup(doutput.node()) >
             needed_buffers.lookup(sorted_dependency_nodes[i])) {
           insertion_position++;
         }
@@ -288,7 +291,7 @@ Schedule compute_schedule(DerivedNodeTree &tree)
           break;
         }
       }
-      sorted_dependency_nodes.insert(insertion_position, output.node());
+      sorted_dependency_nodes.insert(insertion_position, doutput.node());
     }
 
     /* Push the sorted dependency nodes to the node stack in order. */
diff --git a/source/blender/compositor/realtime_compositor/intern/shader_node.cc b/source/blender/compositor/realtime_compositor/intern/shader_node.cc
index f23485cee96..9310de3cbf4 100644
--- a/source/blender/compositor/realtime_compositor/intern/shader_node.cc
+++ b/source/blender/compositor/realtime_compositor/intern/shader_node.cc
@@ -59,7 +59,7 @@ const DNode &ShaderNode::node() const
 
 bNode &ShaderNode::bnode() const
 {
-  return *node_->bnode();
+  return const_cast<bNode &>(*node_);
 }
 
 static eGPUType gpu_type_from_socket_type(eNodeSocketDatatype type)
@@ -77,17 +77,17 @@ static eGPUType gpu_type_from_socket_type(eNodeSocketDatatype type)
   }
 }
 
-static void gpu_stack_vector_from_socket(float *vector, const SocketRef *socket)
+static void gpu_stack_vector_from_socket(float *vector, const bNodeSocket *socket)
 {
-  switch (socket->bsocket()->type) {
+  switch (socket->type) {
     case SOCK_FLOAT:
-      vector[0] = socket->default_value<bNodeSocketValueFloat>()->value;
+      vector[0] = socket->default_value_typed<bNodeSocketValueFloat>()->value;
       return;
     case SOCK_VECTOR:
-      copy_v3_v3(vector, socket->default_value<bNodeSocketValueVector>()->value);
+      copy_v3_v3(vector, socket->default_value_typed<bNodeSocketValueVector>()->value);
       return;
     case SOCK_RGBA:
-      copy_v4_v4(vector, socket->default_value<bNodeSocketValueRGBA>()->value);
+      copy_v4_v4(vector, socket->default_value_typed<bNodeSocketValueRGBA>()->value);
       return;
     default:
       BLI_assert_unreachable();
@@ -101,8 +101,8 @@ static void populate_gpu_node_stack(DSocket socket, GPUNodeStack &stack)
   /* This will be initialized later by the GPU material compiler or the compile method. */
   stack.link = nullptr;
 
-  stack.sockettype = socket->bsocket()->type;
-  stack.type = gpu_type_from_socket_type((eNodeSocketDatatype)socket->bsocket()->type);
+  stack.sockettype = socket->type;
+  stack.type = gpu_type_from_socket_type((eNodeSocketDatatype)socket->type);
 
   if (socket->is_input()) {
     const DInputSocket input(socket);
@@ -117,10 +117,10 @@ static void populate_gpu_node_stack(DSocket socket, GPUNodeStack &stack)
      * unlinked input or an unlinked input of a group input node that the socket is linked to,
      * otherwise, get the value from the socket itself. */
     if (origin->is_input()) {
-      gpu_stack_vector_from_socket(stack.vec, origin.socket_ref());
+      gpu_stack_vector_from_socket(stack.vec, origin.bsocket());
     }
     else {
-      gpu_stack_vector_from_socket(stack.vec, socket.socket_ref());
+      gpu_stack_vector_from_socket(stack.vec, socket.bsocket());
     }
   }
   else {
@@ -132,10 +132,11 @@ void ShaderNode::populate_inputs()
 {
   /* Reserve a stack for each input in addition to an extra stack at the end to mark the end of the
    * array, as this is what the GPU module functions expect. */
-  inputs_.resize(node_->inputs().size() + 1);
+  const int num_input_sockets = node_->input_sockets().size();
+  inputs_.resize(num_input_sockets + 1);
   inputs_.last().end = true;
 
-  for (int i = 0; i < node_->inputs().size(); i++) {
+  for (int i = 0; i < num_input_sockets; i++) {
     populate_gpu_node_stack(node_.input(i), inputs_[i]);
   }
 }
@@ -144,10 +145,11 @@ void ShaderNode::populate_outputs()
 {
   /* Reserve a stack for each output in addition to an extra stack at the end to mark the end of
    * the array, as this is what the GPU module functions expect. */
-  outputs_.resize(node_->outputs().size() + 1);
+  const int num_output_sockets = node_->output_sockets().size();
+  outputs_.resize(num_output_sockets + 1);
   outputs_.last().end = true;
 
-  for (int i = 0; i < node_->outputs().size(); i++) {
+  for (int i = 0; i < num_output_sockets; i++) {
     populate_gpu_node_stack(node_.output(i), outputs_[i]);
   }
 }
diff --git a/source/blender/compositor/realtime_compositor/intern/shader_operation.cc b/source/blender/compositor/realtime_compositor/intern/shader_operation.cc
index 5749d8c5f2e..8e52baf63ec 100644
--- a/source/blender/compositor/realtime_compositor/intern/shader_operation.cc
+++ b/source/blender/compositor/realtime_compositor/intern/shader_operation.cc
@@ -128,7 +128,7 @@ void ShaderOperation::construct_material(void *thunk, GPUMaterial *material)
 {
   ShaderOperation *operation = static_cast<ShaderOperation *>(thunk);
   for (DNode node : operation->compile_unit_) {
-    ShaderNode *shader_node = node->typeinfo()->get_compositor_shader_node(node);
+    ShaderNode *shader_node = node->typeinfo->get_compositor_shader_node(node);
     operation->shader_nodes_.add_new(node, std::unique_ptr<ShaderNode>(shader_node));
 
     operation->link_node_inputs(node, material);
@@ -141,27 +141,27 @@ void ShaderOperation::construct_material(void *thunk, GPUMaterial *material)
 
 void ShaderOperation::link_node_inputs(DNode node, GPUMaterial *material)
 {
-  for (const InputSocketRef *input_ref : node->inputs()) {
-    const DInputSocket input{node.context(), input_ref};
+  for (const bNodeSocket *input : node->input_sockets()) {
+    const DInputSocket dinput{node.context(), input};
 
     /* Get the output linked to the input. If it is null, that means the input is unlinked.
      * Unlinked inputs are linked by the node compile method, so skip this here. */
-    const DOutputSocket output = get_output_linked_to_input(input);
-    if (!output) {
+    const DOutputSocket doutput = get_output_linked_to_input(dinput);
+    if (!doutput) {
       continue;
     }
 
     /* If the origin node is part of the shader operation, then the link is internal to the GPU
      * material graph and is linked appropriately. */
-    if (compile_unit_.contains(output.node())) {
-      link_node_input_internal(input, output);
+    if (compile_unit_.contains(doutput.node())) {
+      link_node_input_internal(dinput, doutput);
       continue;
     }
 
     /* Otherwise, the origin node is not part of the shader operation, then the link is external to
      * the GPU material graph and an input to the shader operation must be declared and linked to
      * the node input. */
-    link_node_input_external(input, output, material);
+    link_node_input_external(dinput, doutput, material);
   }
 }
 
@@ -169,10 +169,10 @@ void ShaderOperation::link_node_input_internal(DInputSocket input_socket,
                                                DOutputSocket output_socket)
 {
   ShaderNode &output_node = *shader_nodes_.lookup(output_socket.node());
-  GPUNodeStack &output_stack = output_node.get_output(output_socket->identifier());
+  GPUNodeStack &output_stack = output_node.get_output(output_socket->identifier);
 
   ShaderNode &input_node = *shader_nodes_.lookup(input_socket.node());
-  GPUNodeStack &input_stack = input_node.get_input(input_socket->identifier());
+  GPUNodeStack &input_stack = input_node.get_input(input_socket->identifier);
 
   input_stack.link = output_stack.link;
 }
@@ -183,7 +183,7 @@ void ShaderOperation::link_node_input_external(DInputSocket input_socket,
 {
 
   ShaderNode &node = *shader_nodes_.lookup(input_socket.node());
-  GPUNodeStack &stack = node.get_input(input_socket->identifier());
+  GPUNodeStack &stack = node.get_input(input_socket->identifier);
 
   /* An input was already declared for that same output socket, so no need to declare it again. */
   if (!output_to_material_attribute_map_.contains(output_socket)) {
@@ -219,8 +219,8 @@ void ShaderOperation::declare_operation_input(DInputSocket input_socket,
 
   /* Declare the input descriptor for this input and prefer to declare its type to be the same as
    * the type of the output socket because doing type conversion in the shader is much cheaper. */
-  InputDescriptor input_descriptor = input_descriptor_from_input_socket(input_socket.socket_ref());
-  input_descriptor.type = get_node_socket_result_type(output_socket.socket_ref());
+  InputDescriptor input_descriptor = input_descriptor_from_input_socket(input_socket.bsocket());
+  input_descriptor.type = get_node_socket_result_type(output_socket.bsocket());
   declare_input_descriptor(input_identifier, input_descriptor);
 
   /* Add a new GPU attribute representing an input to the GPU material. Instead of using the
@@ -242,16 +242,16 @@ void ShaderOperation::declare_operation_input(DInputSocket input_socket,
 
 void ShaderOperation::populate_results_for_node(DNode node, GPUMaterial *material)
 {
-  for (const OutputSocketRef *output_ref : node->outputs()) {
-    const DOutputSocket output{node.context(), output_ref};
+  for (const bNodeSocket *output : node->output_sockets()) {
+    const DOutputSocket doutput{node.context(), output};
 
     /* If any of the nodes linked to the output are not part of the shader operation, then an
      * output result needs to be populated for it. */
     const bool need_to_populate_result = is_output_linked_to_node_conditioned(
-        output, [&](DNode node) { return !compile_unit_.contains(node); });
+        doutput, [&](DNode node) { return !compile_unit_.contains(node); });
 
     if (need_to_populate_result) {
-      populate_operation_result(output, material);
+      populate_operation_result(doutput, material);
     }
   }
 }
@@ -276,7 +276,7 @@ void ShaderOperation::populate_operation_result(DOutputSocket output_socket, GPU
   const unsigned int output_id = output_sockets_to_output_identifiers_map_.size();
   std::string output_identifier = "output" + std::to_string(output_id);
 
-  const ResultType result_type = get_node_socket_result_type(output_socket.socket_ref());
+  const ResultType result_type = get_node_socket_result_type(output_socket.bsocket());
   const Result result = Result(result_type, texture_pool());
   populate_result(output_identifier, result);
 
@@ -284,7 +284,7 @@ void ShaderOperation::populate_operation_result(DOutputSocket output_socket, GPU
   output_sockets_to_output_identifiers_map_.add_new(output_socket, output_identifier);
 
   ShaderNode &node = *shader_nodes_.lookup(output_socket.node());
-  GPUNodeLink *output_link = node.get_output(output_socket->identifier()).link;
+  GPUNodeLink *output_link = node.get_output(output_socket->identifier).link;
 
   /* Link the output node stack to an output storer storing in the appropriate result. The result
    * is identified by its index in the operation and the index is encoded as a float to be passed
diff --git a/source/blender/compositor/realtime_compositor/intern/utilities.cc b/source/blender/compositor/realtime_compositor/intern/utilities.cc
index 169ba70e9eb..2e1baec98a8 100644
--- a/source/blender/compositor/realtime_compositor/intern/utilities.cc
+++ b/source/blender/compositor/realtime_compositor/intern/utilities.cc
@@ -26,7 +26,7 @@ using TargetSocketPathInfo = DOutputSocket::TargetSocketPathInfo;
 DSocket get_input_origin_socket(DInputSocket input)
 {
   /* The input is unlinked. Return the socket itself. */
-  if (input->logically_linked_sockets().is_empty()) {
+  if (!input->is_logically_linked()) {
     return input;
   }
 
@@ -52,9 +52,9 @@ DOutputSocket get_output_linked_to_input(DInputSocket input)
   return DOutputSocket(origin);
 }
 
-ResultType get_node_socket_result_type(const SocketRef *socket)
+ResultType get_node_socket_result_type(const bNodeSocket *socket)
 {
-  switch (socket->bsocket()->type) {
+  switch (socket->type) {
     case SOCK_FLOAT:
       return ResultType::Float;
     case SOCK_VECTOR:
@@ -95,21 +95,20 @@ int number_of_inputs_linked_to_output_conditioned(DOutputSocket output,
 
 bool is_shader_node(DNode node)
 {
-  return node->typeinfo()->get_compositor_shader_node;
+  return node->typeinfo->get_compositor_shader_node;
 }
 
 bool is_node_supported(DNode node)
 {
-  return node->typeinfo()->get_compositor_operation ||
-         node->typeinfo()->get_compositor_shader_node;
+  return node->typeinfo->get_compositor_operation || node->typeinfo->get_compositor_shader_node;
 }
 
-InputDescriptor input_descriptor_from_input_socket(const InputSocketRef *socket)
+InputDescriptor input_descriptor_from_input_socket(const bNodeSocket *socket)
 {
   using namespace nodes;
   InputDescriptor input_descriptor;
   input_descriptor.type = get_node_socket_result_type(socket);
-  const NodeDeclaration *node_declaration = socket->node().declaration();
+  const NodeDeclaration *node_declaration = socket->owner_node().declaration();
   /* Not every node have a declaration, in which case, we assume the default values for the rest of
    * the properties. */
   if (!node_declaration) {
diff --git a/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup.cc b/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup.cc
index 96ab9388023..9ccd7ed447b 100644
--- a/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup.cc
+++ b/source/blender/depsgraph/intern/eval/deg_eval_runtime_backup.cc
@@ -62,6 +62,7 @@ void RuntimeBackup::init_from_id(ID *id)
       break;
     case ID_GD:
       gpencil_backup.init_from_gpencil(reinterpret_cast<bGPdata *>(id));
+      break;
     default:
       break;
   }
@@ -104,6 +105,7 @@ void RuntimeBackup::restore_to_id(ID *id)
       break;
     case ID_GD:
       gpencil_backup.restore_to_gpencil(reinterpret_cast<bGPdata *>(id));
+      break;
     default:
       break;
   }
diff --git a/source/blender/draw/engines/overlay/overlay_edit_uv.c b/source/blender/draw/engines/overlay/overlay_edit_uv.c
index 4cfe9fcea4e..adbe5e7155e 100644
--- a/source/blender/draw/engines/overlay/overlay_edit_uv.c
+++ b/source/blender/draw/engines/overlay/overlay_edit_uv.c
@@ -160,7 +160,6 @@ void OVERLAY_edit_uv_init(OVERLAY_Data *vedata)
   pd->edit_uv.draw_type = sima->dt_uvstretch;
   BLI_listbase_clear(&pd->edit_uv.totals);
   pd->edit_uv.total_area_ratio = 0.0f;
-  pd->edit_uv.total_area_ratio_inv = 0.0f;
 
   /* During engine initialization phase the `sima` isn't locked and
    * we are able to retrieve the needed data.
@@ -280,8 +279,6 @@ void OVERLAY_edit_uv_cache_init(OVERLAY_Data *vedata)
       DRW_shgroup_uniform_block(pd->edit_uv_stretching_grp, "globalsBlock", G_draw.block_ubo);
       DRW_shgroup_uniform_float(
           pd->edit_uv_stretching_grp, "totalAreaRatio", &pd->edit_uv.total_area_ratio, 1);
-      DRW_shgroup_uniform_float(
-          pd->edit_uv_stretching_grp, "totalAreaRatioInv", &pd->edit_uv.total_area_ratio_inv, 1);
     }
   }
 
@@ -510,7 +507,6 @@ static void edit_uv_stretching_update_ratios(OVERLAY_Data *vedata)
 
     if (total_area > FLT_EPSILON && total_area_uv > FLT_EPSILON) {
       pd->edit_uv.total_area_ratio = total_area / total_area_uv;
-      pd->edit_uv.total_area_ratio_inv = total_area_uv / total_area;
     }
   }
   BLI_freelistN(&pd->edit_uv.totals);
diff --git a/source/blender/draw/engines/overlay/overlay_private.h b/source/blender/draw/engines/overlay/overlay_private.h
index 7d216ca54cf..06c6ce42fd8 100644
--- a/source/blender/draw/engines/overlay/overlay_private.h
+++ b/source/blender/draw/engines/overlay/overlay_private.h
@@ -384,7 +384,6 @@ typedef struct OVERLAY_PrivateData {
     eSpaceImage_UVDT_Stretch draw_type;
     ListBase totals;
     float total_area_ratio;
-    float total_area_ratio_inv;
 
     /* stencil overlay */
     struct Image *stencil_image;
diff --git a/source/blender/draw/engines/overlay/shaders/infos/overlay_edit_mode_info.hh b/source/blender/draw/engines/overlay/shaders/infos/overlay_edit_mode_info.hh
index 58f96110887..9396a6d3f2f 100644
--- a/source/blender/draw/engines/overlay/shaders/infos/overlay_edit_mode_info.hh
+++ b/source/blender/draw/engines/overlay/shaders/infos/overlay_edit_mode_info.hh
@@ -293,7 +293,6 @@ GPU_SHADER_CREATE_INFO(overlay_edit_uv_stretching_area)
     .do_static_compilation(true)
     .vertex_in(1, Type::FLOAT, "ratio")
     .push_constant(Type::FLOAT, "totalAreaRatio")
-    .push_constant(Type::FLOAT, "totalAreaRatioInv")
     .additional_info("overlay_edit_uv_stretching");
 
 GPU_SHADER_CREATE_INFO(overlay_edit_uv_stretching_angle)
diff --git a/source/blender/draw/engines/overlay/shaders/overlay_edit_uv_stretching_vert.glsl b/source/blender/draw/engines/overlay/shaders/overlay_edit_uv_stretching_vert.glsl
index bb086e8d9f5..9a3036d5940 100644
--- a/source/blender/draw/engines/overlay/shaders/overlay_edit_uv_stretching_vert.glsl
+++ b/source/blender/draw/engines/overlay/shaders/overlay_edit_uv_stretching_vert.glsl
@@ -55,9 +55,9 @@ float angle_normalized_v2v2(vec2 v1, vec2 v2)
   return (q) ? a : M_PI - a;
 }
 
-float area_ratio_to_stretch(float ratio, float tot_ratio, float inv_tot_ratio)
+float area_ratio_to_stretch(float ratio, float tot_ratio)
 {
-  ratio *= (ratio > 0.0f) ? tot_ratio : -inv_tot_ratio;
+  ratio *= tot_ratio;
   return (ratio > 1.0f) ? (1.0f / ratio) : ratio;
 }
 
@@ -74,7 +74,7 @@ void main()
   stretch = stretch;
   stretch = 1.0 - stretch * stretch;
 #else
-  float stretch = 1.0 - area_ratio_to_stretch(ratio, totalAreaRatio, totalAreaRatioInv);
+  float stretch = 1.0 - area_ratio_to_stretch(ratio, totalAreaRatio);
 
 #endif
 
diff --git a/source/blender/draw/intern/draw_cache_impl_curves.cc b/source/blender/draw/intern/draw_cache_impl_curves.cc
index 1d3d6222f8f..4f0072ec657 100644
--- a/source/blender/draw/intern/draw_cache_impl_curves.cc
+++ b/source/blender/draw/intern/draw_cache_impl_curves.cc
@@ -397,10 +397,10 @@ static void curves_batch_cache_fill_strands_data(const Curves &curves_id,
       curves_id.geometry);
 
   for (const int i : IndexRange(curves.curves_num())) {
-    const IndexRange curve_range = curves.points_for_curve(i);
+    const IndexRange points = curves.points_for_curve(i);
 
-    *(uint *)GPU_vertbuf_raw_step(&data_step) = curve_range.start();
-    *(ushort *)GPU_vertbuf_raw_step(&seg_step) = curve_range.size() - 1;
+    *(uint *)GPU_vertbuf_raw_step(&data_step) = points.start();
+    *(ushort *)GPU_vertbuf_raw_step(&seg_step) = points.size() - 1;
   }
 }
 
diff --git a/source/blender/draw/intern/draw_debug.cc b/source/blender/draw/intern/draw_debug.cc
index b9d10302c1e..ab78db5d913 100644
--- a/source/blender/draw/intern/draw_debug.cc
+++ b/source/blender/draw/intern/draw_debug.cc
@@ -525,14 +525,14 @@ void DebugDraw::display_lines()
   if (gpu_draw_buf_used) {
     GPU_debug_group_begin("GPU");
     GPU_storagebuf_bind(gpu_draw_buf_, slot);
-    GPU_batch_draw_indirect(batch, gpu_draw_buf_);
+    GPU_batch_draw_indirect(batch, gpu_draw_buf_, 0);
     GPU_storagebuf_unbind(gpu_draw_buf_);
     GPU_debug_group_end();
   }
 
   GPU_debug_group_begin("CPU");
   GPU_storagebuf_bind(cpu_draw_buf_, slot);
-  GPU_batch_draw_indirect(batch, cpu_draw_buf_);
+  GPU_batch_draw_indirect(batch, cpu_draw_buf_, 0);
   GPU_storagebuf_unbind(cpu_draw_buf_);
   GPU_debug_group_end();
 
@@ -557,14 +557,14 @@ void DebugDraw::display_prints()
   if (gpu_print_buf_used) {
     GPU_debug_group_begin("GPU");
     GPU_storagebuf_bind(gpu_print_buf_, slot);
-    GPU_batch_draw_indirect(batch, gpu_print_buf_);
+    GPU_batch_draw_indirect(batch, gpu_print_buf_, 0);
     GPU_storagebuf_unbind(gpu_print_buf_);
     GPU_debug_group_end();
   }
 
   GPU_debug_group_begin("CPU");
   GPU_storagebuf_bind(cpu_print_buf_, slot);
-  GPU_batch_draw_indirect(batch, cpu_print_buf_);
+  GPU_batch_draw_indirect(batch, cpu_print_buf_, 0);
   GPU_storagebuf_unbind(cpu_print_buf_);
   GPU_debug_group_end();
 
diff --git a/source/blender/draw/intern/draw_manager_exec.c b/source/blender/draw/intern/draw_manager_exec.c
index 4dda0ceb2ef..0e39cc1d3b9 100644
--- a/source/blender/draw/intern/draw_manager_exec.c
+++ b/source/blender/draw/intern/draw_manager_exec.c
@@ -891,7 +891,7 @@ static void draw_call_indirect(DRWShadingGroup *shgroup,
   }
 
   GPU_batch_set_shader(batch, shgroup->shader);
-  GPU_batch_draw_indirect(batch, indirect_buf);
+  GPU_batch_draw_indirect(batch, indirect_buf, 0);
 }
 
 static void draw_call_batching_start(DRWCommandsState *state)
diff --git a/source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_edituv_stretch_area.cc b/source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_edituv_stretch_area.cc
index febddf61e1f..9679c0523f8 100644
--- a/source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_edituv_stretch_area.cc
+++ b/source/blender/draw/intern/mesh_extractors/extract_mesh_vbo_edituv_stretch_area.cc
@@ -27,7 +27,7 @@ static void extract_edituv_stretch_area_init(const MeshRenderData *mr,
   GPUVertBuf *vbo = static_cast<GPUVertBuf *>(buf);
   static GPUVertFormat format = {0};
   if (format.attr_len == 0) {
-    GPU_vertformat_attr_add(&format, "ratio", GPU_COMP_I16, 1, GPU_FETCH_INT_TO_FLOAT_UNIT);
+    GPU_vertformat_attr_add(&format, "ratio", GPU_COMP_F32, 1, GPU_FETCH_FLOAT);
   }
 
   GPU_vertbuf_init_with_format(vbo, &format);
@@ -37,15 +37,14 @@ static void extract_edituv_stretch_area_init(const MeshRenderData *mr,
 BLI_INLINE float area_ratio_get(float area, float uvarea)
 {
   if (area >= FLT_EPSILON && uvarea >= FLT_EPSILON) {
-    /* Tag inversion by using the sign. */
-    return (area > uvarea) ? (uvarea / area) : -(area / uvarea);
+    return uvarea / area;
   }
   return 0.0f;
 }
 
-BLI_INLINE float area_ratio_to_stretch(float ratio, float tot_ratio, float inv_tot_ratio)
+BLI_INLINE float area_ratio_to_stretch(float ratio, float tot_ratio)
 {
-  ratio *= (ratio > 0.0f) ? tot_ratio : -inv_tot_ratio;
+  ratio *= tot_ratio;
   return (ratio > 1.0f) ? (1.0f / ratio) : ratio;
 }
 
@@ -97,14 +96,8 @@ static void extract_edituv_stretch_area_finish(const MeshRenderData *mr,
   float *area_ratio = static_cast<float *>(MEM_mallocN(sizeof(float) * mr->poly_len, __func__));
   compute_area_ratio(mr, area_ratio, cache->tot_area, cache->tot_uv_area);
 
-  /* Convert in place to avoid an extra allocation */
-  uint16_t *poly_stretch = (uint16_t *)area_ratio;
-  for (int mp_index = 0; mp_index < mr->poly_len; mp_index++) {
-    poly_stretch[mp_index] = area_ratio[mp_index] * SHRT_MAX;
-  }
-
   /* Copy face data for each loop. */
-  uint16_t *loop_stretch = (uint16_t *)GPU_vertbuf_get_data(vbo);
+  float *loop_stretch = (float *)GPU_vertbuf_get_data(vbo);
 
   if (mr->extract_type == MR_EXTRACT_BMESH) {
     BMFace *efa;
@@ -112,7 +105,7 @@ static void extract_edituv_stretch_area_finish(const MeshRenderData *mr,
     int f, l_index = 0;
     BM_ITER_MESH_INDEX (efa, &f_iter, mr->bm, BM_FACES_OF_MESH, f) {
       for (int i = 0; i < efa->len; i++, l_index++) {
-        loop_stretch[l_index] = poly_stretch[f];
+        loop_stretch[l_index] = area_ratio[f];
       }
     }
   }
@@ -121,7 +114,7 @@ static void extract_edituv_stretch_area_finish(const MeshRenderData *mr,
     const MPoly *mp = mr->mpoly;
     for (int mp_index = 0, l_index = 0; mp_index < mr->poly_len; mp_index++, mp++) {
       for (int i = 0; i < mp->totloop; i++, l_index++) {
-        loop_stretch[l_index] = poly_stretch[mp_index];
+        loop_stretch[l_index] = area_ratio[mp_index];
       }
     }
   }
diff --git a/source/blender/editors/curves/intern/curves_add.cc b/source/blender/editors/curves/intern/curves_add.cc
index 79916253207..f234a58f439 100644
--- a/source/blender/editors/curves/intern/curves_add.cc
+++ b/source/blender/editors/curves/intern/curves_add.cc
@@ -102,10 +102,9 @@ bke::CurvesGeometry primitive_random_sphere(const int curves_size, const int poi
 
   MutableSpan<int> offsets = curves.offsets_for_write();
   MutableSpan<float3> positions = curves.positions_for_write();
-
-  float *radius_data = (float *)CustomData_add_layer_named(
-      &curves.point_data, CD_PROP_FLOAT, CD_DEFAULT, nullptr, curves.point_num, "radius");
-  MutableSpan<float> radii{radius_data, curves.points_num()};
+  bke::MutableAttributeAccessor attributes = curves.attributes_for_write();
+  bke::SpanAttributeWriter<float> radius = attributes.lookup_or_add_for_write_only_span<float>(
+      "radius", ATTR_DOMAIN_POINT);
 
   for (const int i : offsets.index_range()) {
     offsets[i] = points_per_curve * i;
@@ -114,9 +113,9 @@ bke::CurvesGeometry primitive_random_sphere(const int curves_size, const int poi
   RandomNumberGenerator rng;
 
   for (const int i : curves.curves_range()) {
-    const IndexRange curve_range = curves.points_for_curve(i);
-    MutableSpan<float3> curve_positions = positions.slice(curve_range);
-    MutableSpan<float> curve_radii = radii.slice(curve_range);
+    const IndexRange points = curves.points_for_curve(i);
+    MutableSpan<float3> curve_positions = positions.slice(points);
+    MutableSpan<float> curve_radii = radius.span.slice(points);
 
     const float theta = 2.0f * M_PI * rng.get_float();
     const float phi = saacosf(2.0f * rng.get_float() - 1.0f);
@@ -135,6 +134,8 @@ bke::CurvesGeometry primitive_random_sphere(const int curves_size, const int poi
     }
   }
 
+  radius.finish();
+
   return curves;
 }
 
diff --git a/source/blender/editors/geometry/geometry_attributes.cc b/source/blender/editors/geometry/geometry_attributes.cc
index aec22f0f3ae..2dcb7aa438f 100644
--- a/source/blender/editors/geometry/geometry_attributes.cc
+++ b/source/blender/editors/geometry/geometry_attributes.cc
@@ -305,7 +305,7 @@ static int geometry_attribute_convert_exec(bContext *C, wmOperator *op)
       void *new_data = MEM_malloc_arrayN(src_varray.size(), cpp_type.size(), __func__);
       src_varray.materialize_to_uninitialized(new_data);
       attributes.remove(name);
-      attributes.add(name, dst_domain, dst_type, blender::bke::AttributeInitMove(new_data));
+      attributes.add(name, dst_domain, dst_type, blender::bke::AttributeInitMoveArray(new_data));
       break;
     }
     case ConvertAttributeMode::UVMap: {
@@ -660,7 +660,7 @@ bool ED_geometry_attribute_convert(Mesh *mesh,
   void *new_data = MEM_malloc_arrayN(src_varray.size(), cpp_type.size(), __func__);
   src_varray.materialize_to_uninitialized(new_data);
   attributes.remove(name);
-  attributes.add(name, new_domain, new_type, blender::bke::AttributeInitMove(new_data));
+  attributes.add(name, new_domain, new_type, blender::bke::AttributeInitMoveArray(new_data));
 
   int *active_index = BKE_id_attributes_active_index_p(&mesh->id);
   if (*active_index > 0) {
diff --git a/source/blender/editors/gpencil/gpencil_edit.c b/source/blender/editors/gpencil/gpencil_edit.c
index 9843bd22bb6..280512a2dd3 100644
--- a/source/blender/editors/gpencil/gpencil_edit.c
+++ b/source/blender/editors/gpencil/gpencil_edit.c
@@ -4770,6 +4770,8 @@ void GPENCIL_OT_stroke_sample(wmOperatorType *ot)
 
   /* properties */
   prop = RNA_def_float(ot->srna, "length", 0.1f, 0.0f, 100.0f, "Length", "", 0.0f, 100.0f);
+  prop = RNA_def_float(
+      ot->srna, "sharp_threshold", 0.1f, 0.0f, M_PI, "Sharp Threshold", "", 0.0f, M_PI);
   /* avoid re-using last var */
   RNA_def_property_flag(prop, PROP_SKIP_SAVE);
 }
diff --git a/source/blender/editors/interface/interface.cc b/source/blender/editors/interface/interface.cc
index c076845af3c..933724c9294 100644
--- a/source/blender/editors/interface/interface.cc
+++ b/source/blender/editors/interface/interface.cc
@@ -6754,10 +6754,11 @@ void UI_but_extra_icon_string_info_get(struct bContext *C, uiButExtraOpIcon *ext
         if (ui_but_extra_icon_event_operator_string(C, extra_icon, buf, sizeof(buf))) {
           tmp = BLI_strdup(buf);
         }
+        break;
       }
+      default:
         /* Other types not supported. The caller should expect that outcome, no need to message or
          * assert here. */
-      default:
         break;
     }
 
diff --git a/source/blender/editors/interface/interface_template_search_menu.cc b/source/blender/editors/interface/interface_template_search_menu.cc
index c3021028b97..c777b7834f2 100644
--- a/source/blender/editors/interface/interface_template_search_menu.cc
+++ b/source/blender/editors/interface/interface_template_search_menu.cc
@@ -918,6 +918,7 @@ static void menu_search_arg_free_fn(void *data_v)
           WM_operator_properties_free(item->op.opptr);
           MEM_freeN(item->op.opptr);
         }
+        break;
       }
       case MenuSearch_Item::Type::RNA: {
         break;
diff --git a/source/blender/editors/mesh/mesh_data.cc b/source/blender/editors/mesh/mesh_data.cc
index ea29d07feaf..e394f8a7251 100644
--- a/source/blender/editors/mesh/mesh_data.cc
+++ b/source/blender/editors/mesh/mesh_data.cc
@@ -286,7 +286,8 @@ int ED_mesh_uv_add(
       is_init = true;
     }
     else {
-      CustomData_add_layer_named(&me->ldata, CD_MLOOPUV, CD_DEFAULT, nullptr, me->totloop, name);
+      CustomData_add_layer_named(
+          &me->ldata, CD_MLOOPUV, CD_SET_DEFAULT, nullptr, me->totloop, name);
     }
 
     if (active_set || layernum_dst == 0) {
@@ -409,7 +410,7 @@ int ED_mesh_color_add(
     }
     else {
       CustomData_add_layer_named(
-          &me->ldata, CD_PROP_BYTE_COLOR, CD_DEFAULT, nullptr, me->totloop, name);
+          &me->ldata, CD_PROP_BYTE_COLOR, CD_SET_DEFAULT, nullptr, me->totloop, name);
     }
 
     if (active_set || layernum == 0) {
@@ -432,7 +433,7 @@ bool ED_mesh_color_ensure(Mesh *me, const char *name)
 
   if (!layer) {
     CustomData_add_layer_named(
-        &me->ldata, CD_PROP_BYTE_COLOR, CD_DEFAULT, nullptr, me->totloop, name);
+        &me->ldata, CD_PROP_BYTE_COLOR, CD_SET_DEFAULT, nullptr, me->totloop, name);
     layer = me->ldata.layers + CustomData_get_layer_index(&me->ldata, CD_PROP_BYTE_COLOR);
 
     BKE_id_attributes_active_color_set(&me->id, layer);
@@ -500,7 +501,7 @@ int ED_mesh_sculpt_color_add(Mesh *me, const char *name, const bool do_init, Rep
     }
     else {
       CustomData_add_layer_named(
-          &me->vdata, CD_PROP_COLOR, CD_DEFAULT, nullptr, me->totvert, name);
+          &me->vdata, CD_PROP_COLOR, CD_SET_DEFAULT, nullptr, me->totvert, name);
     }
 
     if (layernum == 0) {
@@ -790,7 +791,7 @@ static int mesh_customdata_custom_splitnormals_add_exec(bContext *C, wmOperator
                                        me->smoothresh);
       }
 
-      CustomData_add_layer(data, CD_CUSTOMLOOPNORMAL, CD_DEFAULT, nullptr, me->totloop);
+      CustomData_add_layer(data, CD_CUSTOMLOOPNORMAL, CD_SET_DEFAULT, nullptr, me->totloop);
     }
 
     DEG_id_tag_update(&me->id, 0);
@@ -875,11 +876,11 @@ static void mesh_add_verts(Mesh *mesh, int len)
 
   int totvert = mesh->totvert + len;
   CustomData vdata;
-  CustomData_copy(&mesh->vdata, &vdata, CD_MASK_MESH.vmask, CD_DEFAULT, totvert);
+  CustomData_copy(&mesh->vdata, &vdata, CD_MASK_MESH.vmask, CD_SET_DEFAULT, totvert);
   CustomData_copy_data(&mesh->vdata, &vdata, 0, 0, mesh->totvert);
 
   if (!CustomData_has_layer(&vdata, CD_MVERT)) {
-    CustomData_add_layer(&vdata, CD_MVERT, CD_CALLOC, nullptr, totvert);
+    CustomData_add_layer(&vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, totvert);
   }
 
   CustomData_free(&mesh->vdata, mesh->totvert);
@@ -913,11 +914,11 @@ static void mesh_add_edges(Mesh *mesh, int len)
   totedge = mesh->totedge + len;
 
   /* Update custom-data. */
-  CustomData_copy(&mesh->edata, &edata, CD_MASK_MESH.emask, CD_DEFAULT, totedge);
+  CustomData_copy(&mesh->edata, &edata, CD_MASK_MESH.emask, CD_SET_DEFAULT, totedge);
   CustomData_copy_data(&mesh->edata, &edata, 0, 0, mesh->totedge);
 
   if (!CustomData_has_layer(&edata, CD_MEDGE)) {
-    CustomData_add_layer(&edata, CD_MEDGE, CD_CALLOC, nullptr, totedge);
+    CustomData_add_layer(&edata, CD_MEDGE, CD_SET_DEFAULT, nullptr, totedge);
   }
 
   CustomData_free(&mesh->edata, mesh->totedge);
@@ -947,11 +948,11 @@ static void mesh_add_loops(Mesh *mesh, int len)
   totloop = mesh->totloop + len; /* new face count */
 
   /* update customdata */
-  CustomData_copy(&mesh->ldata, &ldata, CD_MASK_MESH.lmask, CD_DEFAULT, totloop);
+  CustomData_copy(&mesh->ldata, &ldata, CD_MASK_MESH.lmask, CD_SET_DEFAULT, totloop);
   CustomData_copy_data(&mesh->ldata, &ldata, 0, 0, mesh->totloop);
 
   if (!CustomData_has_layer(&ldata, CD_MLOOP)) {
-    CustomData_add_layer(&ldata, CD_MLOOP, CD_CALLOC, nullptr, totloop);
+    CustomData_add_layer(&ldata, CD_MLOOP, CD_SET_DEFAULT, nullptr, totloop);
   }
 
   BKE_mesh_runtime_clear_cache(mesh);
@@ -976,11 +977,11 @@ static void mesh_add_polys(Mesh *mesh, int len)
   totpoly = mesh->totpoly + len; /* new face count */
 
   /* update customdata */
-  CustomData_copy(&mesh->pdata, &pdata, CD_MASK_MESH.pmask, CD_DEFAULT, totpoly);
+  CustomData_copy(&mesh->pdata, &pdata, CD_MASK_MESH.pmask, CD_SET_DEFAULT, totpoly);
   CustomData_copy_data(&mesh->pdata, &pdata, 0, 0, mesh->totpoly);
 
   if (!CustomData_has_layer(&pdata, CD_MPOLY)) {
-    CustomData_add_layer(&pdata, CD_MPOLY, CD_CALLOC, nullptr, totpoly);
+    CustomData_add_layer(&pdata, CD_MPOLY, CD_SET_DEFAULT, nullptr, totpoly);
   }
 
   CustomData_free(&mesh->pdata, mesh->totpoly);
diff --git a/source/blender/editors/mesh/meshtools.cc b/source/blender/editors/mesh/meshtools.cc
index 7db777c2134..330560be026 100644
--- a/source/blender/editors/mesh/meshtools.cc
+++ b/source/blender/editors/mesh/meshtools.cc
@@ -103,7 +103,7 @@ static void join_mesh_single(Depsgraph *depsgraph,
     ((Mesh *)ob_dst->data)->cd_flag |= me->cd_flag;
 
     /* standard data */
-    CustomData_merge(&me->vdata, vdata, CD_MASK_MESH.vmask, CD_DEFAULT, totvert);
+    CustomData_merge(&me->vdata, vdata, CD_MASK_MESH.vmask, CD_SET_DEFAULT, totvert);
     CustomData_copy_data_named(&me->vdata, vdata, 0, *vertofs, me->totvert);
 
     /* vertex groups */
@@ -202,7 +202,7 @@ static void join_mesh_single(Depsgraph *depsgraph,
   }
 
   if (me->totedge) {
-    CustomData_merge(&me->edata, edata, CD_MASK_MESH.emask, CD_DEFAULT, totedge);
+    CustomData_merge(&me->edata, edata, CD_MASK_MESH.emask, CD_SET_DEFAULT, totedge);
     CustomData_copy_data_named(&me->edata, edata, 0, *edgeofs, me->totedge);
 
     for (a = 0; a < me->totedge; a++, medge++) {
@@ -223,7 +223,7 @@ static void join_mesh_single(Depsgraph *depsgraph,
       }
     }
 
-    CustomData_merge(&me->ldata, ldata, CD_MASK_MESH.lmask, CD_DEFAULT, totloop);
+    CustomData_merge(&me->ldata, ldata, CD_MASK_MESH.lmask, CD_SET_DEFAULT, totloop);
     CustomData_copy_data_named(&me->ldata, ldata, 0, *loopofs, me->totloop);
 
     for (a = 0; a < me->totloop; a++, mloop++) {
@@ -247,7 +247,7 @@ static void join_mesh_single(Depsgraph *depsgraph,
       }
     }
 
-    CustomData_merge(&me->pdata, pdata, CD_MASK_MESH.pmask, CD_DEFAULT, totpoly);
+    CustomData_merge(&me->pdata, pdata, CD_MASK_MESH.pmask, CD_SET_DEFAULT, totpoly);
     CustomData_copy_data_named(&me->pdata, pdata, 0, *polyofs, me->totpoly);
 
     blender::bke::AttributeWriter<int> material_indices =
@@ -584,10 +584,10 @@ int ED_mesh_join_objects_exec(bContext *C, wmOperator *op)
   CustomData_reset(&ldata);
   CustomData_reset(&pdata);
 
-  mvert = (MVert *)CustomData_add_layer(&vdata, CD_MVERT, CD_CALLOC, nullptr, totvert);
-  medge = (MEdge *)CustomData_add_layer(&edata, CD_MEDGE, CD_CALLOC, nullptr, totedge);
-  mloop = (MLoop *)CustomData_add_layer(&ldata, CD_MLOOP, CD_CALLOC, nullptr, totloop);
-  mpoly = (MPoly *)CustomData_add_layer(&pdata, CD_MPOLY, CD_CALLOC, nullptr, totpoly);
+  mvert = (MVert *)CustomData_add_layer(&vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, totvert);
+  medge = (MEdge *)CustomData_add_layer(&edata, CD_MEDGE, CD_SET_DEFAULT, nullptr, totedge);
+  mloop = (MLoop *)CustomData_add_layer(&ldata, CD_MLOOP, CD_SET_DEFAULT, nullptr, totloop);
+  mpoly = (MPoly *)CustomData_add_layer(&pdata, CD_MPOLY, CD_SET_DEFAULT, nullptr, totpoly);
 
   vertofs = 0;
   edgeofs = 0;
diff --git a/source/blender/editors/object/object_facemap_ops.c b/source/blender/editors/object/object_facemap_ops.c
index dddf5e40e87..4364375a4e3 100644
--- a/source/blender/editors/object/object_facemap_ops.c
+++ b/source/blender/editors/object/object_facemap_ops.c
@@ -53,7 +53,7 @@ void ED_object_facemap_face_add(Object *ob, bFaceMap *fmap, int facenum)
 
     /* if there's is no facemap layer then create one */
     if ((facemap = CustomData_get_layer(&me->pdata, CD_FACEMAP)) == NULL) {
-      facemap = CustomData_add_layer(&me->pdata, CD_FACEMAP, CD_DEFAULT, NULL, me->totpoly);
+      facemap = CustomData_add_layer(&me->pdata, CD_FACEMAP, CD_SET_DEFAULT, NULL, me->totpoly);
     }
 
     facemap[facenum] = fmap_nr;
diff --git a/source/blender/editors/object/object_modifier.cc b/source/blender/editors/object/object_modifier.cc
index f6e97f81cb6..085ef59ac21 100644
--- a/source/blender/editors/object/object_modifier.cc
+++ b/source/blender/editors/object/object_modifier.cc
@@ -586,9 +586,11 @@ bool ED_object_modifier_convert_psys_to_mesh(ReportList *UNUSED(reports),
   me->totvert = verts_num;
   me->totedge = edges_num;
 
-  me->mvert = (MVert *)CustomData_add_layer(&me->vdata, CD_MVERT, CD_CALLOC, nullptr, verts_num);
-  me->medge = (MEdge *)CustomData_add_layer(&me->edata, CD_MEDGE, CD_CALLOC, nullptr, edges_num);
-  me->mface = (MFace *)CustomData_add_layer(&me->fdata, CD_MFACE, CD_CALLOC, nullptr, 0);
+  me->mvert = (MVert *)CustomData_add_layer(
+      &me->vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, verts_num);
+  me->medge = (MEdge *)CustomData_add_layer(
+      &me->edata, CD_MEDGE, CD_SET_DEFAULT, nullptr, edges_num);
+  me->mface = (MFace *)CustomData_add_layer(&me->fdata, CD_MFACE, CD_SET_DEFAULT, nullptr, 0);
 
   MVert *mvert = me->mvert;
   MEdge *medge = me->medge;
@@ -2642,7 +2644,7 @@ static Object *modifier_skin_armature_create(Depsgraph *depsgraph, Main *bmain,
   MVert *mvert = me_eval_deform->mvert;
 
   /* add vertex weights to original mesh */
-  CustomData_add_layer(&me->vdata, CD_MDEFORMVERT, CD_CALLOC, nullptr, me->totvert);
+  CustomData_add_layer(&me->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, nullptr, me->totvert);
 
   ViewLayer *view_layer = DEG_get_input_view_layer(depsgraph);
   Object *arm_ob = BKE_object_add(bmain, view_layer, OB_ARMATURE, nullptr);
diff --git a/source/blender/editors/object/object_relations.c b/source/blender/editors/object/object_relations.c
index 8f563fa388a..cfbb0a724b7 100644
--- a/source/blender/editors/object/object_relations.c
+++ b/source/blender/editors/object/object_relations.c
@@ -2356,6 +2356,25 @@ static int make_override_library_exec(bContext *C, wmOperator *op)
 
   BKE_main_id_tag_all(bmain, LIB_TAG_DOIT, false);
 
+  /* For the time being, replace selected linked objects by their overrides in all collections.
+   * While this may not be the absolute best behavior in all cases, in most common one this should
+   * match the expected result. */
+  if (user_overrides_objects_uids != NULL) {
+    LISTBASE_FOREACH (Collection *, coll_iter, &bmain->collections) {
+      if (ID_IS_LINKED(coll_iter)) {
+        continue;
+      }
+      LISTBASE_FOREACH (CollectionObject *, coll_ob_iter, &coll_iter->gobject) {
+        if (BLI_gset_haskey(user_overrides_objects_uids,
+                            POINTER_FROM_UINT(coll_ob_iter->ob->id.session_uuid))) {
+          /* Tag for remapping when creating overrides. */
+          coll_iter->id.tag |= LIB_TAG_DOIT;
+          break;
+        }
+      }
+    }
+  }
+
   ID *id_root_override;
   const bool success = BKE_lib_override_library_create(bmain,
                                                        scene,
diff --git a/source/blender/editors/object/object_vgroup.cc b/source/blender/editors/object/object_vgroup.cc
index 0e0f5bd94cc..7a61adfb95c 100644
--- a/source/blender/editors/object/object_vgroup.cc
+++ b/source/blender/editors/object/object_vgroup.cc
@@ -1773,7 +1773,8 @@ static void vgroup_lock_all(Object *ob, int action, int mask)
             continue;
           }
           break;
-        default:;
+        default:
+          break;
       }
 
       if (dg->flag & DG_LOCK_WEIGHT) {
@@ -1795,7 +1796,8 @@ static void vgroup_lock_all(Object *ob, int action, int mask)
           continue;
         }
         break;
-      default:;
+      default:
+        break;
     }
 
     switch (action) {
diff --git a/source/blender/editors/sculpt_paint/curves_sculpt_grow_shrink.cc b/source/blender/editors/sculpt_paint/curves_sculpt_grow_shrink.cc
index 1ee43d98e6f..02ae89b41e6 100644
--- a/source/blender/editors/sculpt_paint/curves_sculpt_grow_shrink.cc
+++ b/source/blender/editors/sculpt_paint/curves_sculpt_grow_shrink.cc
@@ -144,21 +144,20 @@ class ExtrapolateCurvesEffect : public CurvesEffect {
       for (const int influence_i : range) {
         const int curve_i = curve_indices[influence_i];
         const float move_distance_cu = move_distances_cu[influence_i];
-        const IndexRange curve_points = curves.points_for_curve(curve_i);
+        const IndexRange points = curves.points_for_curve(curve_i);
 
-        if (curve_points.size() <= 1) {
+        if (points.size() <= 1) {
           continue;
         }
 
-        const float3 old_last_pos_cu = positions_cu[curve_points.last()];
+        const float3 old_last_pos_cu = positions_cu[points.last()];
         /* Use some point within the curve rather than the end point to smooth out some random
          * variation. */
-        const float3 direction_reference_point =
-            positions_cu[curve_points[curve_points.size() / 2]];
+        const float3 direction_reference_point = positions_cu[points[points.size() / 2]];
         const float3 direction = math::normalize(old_last_pos_cu - direction_reference_point);
 
         const float3 new_last_pos_cu = old_last_pos_cu + direction * move_distance_cu;
-        move_last_point_and_resample(positions_cu.slice(curve_points), new_last_pos_cu);
+        move_last_point_and_resample(positions_cu.slice(points), new_last_pos_cu);
       }
     });
   }
diff --git a/source/blender/editors/sculpt_paint/paint_hide.c b/source/blender/editors/sculpt_paint/paint_hide.c
index a7aa29853e6..c1289364fb2 100644
--- a/source/blender/editors/sculpt_paint/paint_hide.c
+++ b/source/blender/editors/sculpt_paint/paint_hide.c
@@ -81,7 +81,7 @@ static void partialvis_update_mesh(Object *ob,
   bool *hide_vert = CustomData_get_layer_named(&me->vdata, CD_PROP_BOOL, ".hide_vert");
   if (hide_vert == NULL) {
     hide_vert = CustomData_add_layer_named(
-        &me->vdata, CD_PROP_BOOL, CD_CALLOC, NULL, me->totvert, ".hide_vert");
+        &me->vdata, CD_PROP_BOOL, CD_SET_DEFAULT, NULL, me->totvert, ".hide_vert");
   }
 
   SCULPT_undo_push_node(ob, node, SCULPT_UNDO_HIDDEN);
diff --git a/source/blender/editors/sculpt_paint/sculpt_dyntopo.c b/source/blender/editors/sculpt_paint/sculpt_dyntopo.c
index 433823c8373..000b69cc2ba 100644
--- a/source/blender/editors/sculpt_paint/sculpt_dyntopo.c
+++ b/source/blender/editors/sculpt_paint/sculpt_dyntopo.c
@@ -218,7 +218,7 @@ static void SCULPT_dynamic_topology_disable_ex(
 
     /* Reset Face Sets as they are no longer valid. */
     if (!CustomData_has_layer(&me->pdata, CD_SCULPT_FACE_SETS)) {
-      CustomData_add_layer(&me->pdata, CD_SCULPT_FACE_SETS, CD_CALLOC, NULL, me->totpoly);
+      CustomData_add_layer(&me->pdata, CD_SCULPT_FACE_SETS, CD_SET_DEFAULT, NULL, me->totpoly);
     }
     ss->face_sets = CustomData_get_layer(&me->pdata, CD_SCULPT_FACE_SETS);
     for (int i = 0; i < me->totpoly; i++) {
diff --git a/source/blender/editors/sculpt_paint/sculpt_undo.c b/source/blender/editors/sculpt_paint/sculpt_undo.c
index 58d62fb2165..b0dcef61c31 100644
--- a/source/blender/editors/sculpt_paint/sculpt_undo.c
+++ b/source/blender/editors/sculpt_paint/sculpt_undo.c
@@ -1683,7 +1683,7 @@ static void sculpt_undo_set_active_layer(struct bContext *C, SculptAttrRef *attr
     CustomData *cdata = attr->domain == ATTR_DOMAIN_POINT ? &me->vdata : &me->ldata;
     int totelem = attr->domain == ATTR_DOMAIN_POINT ? me->totvert : me->totloop;
 
-    CustomData_add_layer_named(cdata, attr->type, CD_DEFAULT, NULL, totelem, attr->name);
+    CustomData_add_layer_named(cdata, attr->type, CD_SET_DEFAULT, NULL, totelem, attr->name);
     layer = BKE_id_attribute_find(&me->id, attr->name, attr->type, attr->domain);
   }
 
diff --git a/source/blender/editors/space_node/drawnode.cc b/source/blender/editors/space_node/drawnode.cc
index 25ab06850f5..e8325d658ca 100644
--- a/source/blender/editors/space_node/drawnode.cc
+++ b/source/blender/editors/space_node/drawnode.cc
@@ -477,7 +477,7 @@ static void node_shader_set_butfunc(bNodeType *ntype)
     case SH_NODE_RGB:
       ntype->draw_buttons = node_buts_rgb;
       break;
-    case SH_NODE_MIX_RGB:
+    case SH_NODE_MIX_RGB_LEGACY:
       ntype->draw_buttons = node_buts_mix_rgb;
       break;
     case SH_NODE_VALTORGB:
diff --git a/source/blender/editors/space_node/node_relationships.cc b/source/blender/editors/space_node/node_relationships.cc
index d911e53be7f..3a8bb56bc5e 100644
--- a/source/blender/editors/space_node/node_relationships.cc
+++ b/source/blender/editors/space_node/node_relationships.cc
@@ -18,6 +18,7 @@
 #include "BKE_lib_id.h"
 #include "BKE_main.h"
 #include "BKE_node.h"
+#include "BKE_node_runtime.hh"
 #include "BKE_node_tree_update.h"
 #include "BKE_screen.h"
 
@@ -46,14 +47,11 @@
 #include "BLT_translation.h"
 
 #include "NOD_node_declaration.hh"
-#include "NOD_node_tree_ref.hh"
 #include "NOD_socket_declarations.hh"
 #include "NOD_socket_declarations_geometry.hh"
 
 #include "node_intern.hh" /* own include */
 
-using namespace blender::nodes::node_tree_ref_types;
-
 struct bNodeListItem {
   struct bNodeListItem *next, *prev;
   struct bNode *node;
@@ -434,18 +432,18 @@ namespace viewer_linking {
  * \{ */
 
 /* Depending on the node tree type, different socket types are supported by viewer nodes. */
-static bool socket_can_be_viewed(const OutputSocketRef &socket)
+static bool socket_can_be_viewed(const bNodeSocket &socket)
 {
-  if (nodeSocketIsHidden(socket.bsocket())) {
+  if (nodeSocketIsHidden(&socket)) {
     return false;
   }
-  if (socket.idname() == "NodeSocketVirtual") {
+  if (STREQ(socket.idname, "NodeSocketVirtual")) {
     return false;
   }
-  if (socket.tree().btree()->type != NTREE_GEOMETRY) {
+  if (socket.owner_tree().type != NTREE_GEOMETRY) {
     return true;
   }
-  return ELEM(socket.typeinfo()->type,
+  return ELEM(socket.typeinfo->type,
               SOCK_GEOMETRY,
               SOCK_FLOAT,
               SOCK_VECTOR,
@@ -502,15 +500,15 @@ static bNodeSocket *node_link_viewer_get_socket(bNodeTree &ntree,
   return nullptr;
 }
 
-static bool is_viewer_node(const NodeRef &node)
+static bool is_viewer_node(const bNode &node)
 {
-  return ELEM(node.bnode()->type, CMP_NODE_VIEWER, CMP_NODE_SPLITVIEWER, GEO_NODE_VIEWER);
+  return ELEM(node.type, CMP_NODE_VIEWER, CMP_NODE_SPLITVIEWER, GEO_NODE_VIEWER);
 }
 
-static Vector<const NodeRef *> find_viewer_nodes(const NodeTreeRef &tree)
+static Vector<const bNode *> find_viewer_nodes(const bNodeTree &tree)
 {
-  Vector<const NodeRef *> viewer_nodes;
-  for (const NodeRef *node : tree.nodes()) {
+  Vector<const bNode *> viewer_nodes;
+  for (const bNode *node : tree.all_nodes()) {
     if (is_viewer_node(*node)) {
       viewer_nodes.append(node);
     }
@@ -518,20 +516,20 @@ static Vector<const NodeRef *> find_viewer_nodes(const NodeTreeRef &tree)
   return viewer_nodes;
 }
 
-static bool is_viewer_socket_in_viewer(const InputSocketRef &socket)
+static bool is_viewer_socket_in_viewer(const bNodeSocket &socket)
 {
-  const NodeRef &node = socket.node();
+  const bNode &node = socket.owner_node();
   BLI_assert(is_viewer_node(node));
-  if (node.typeinfo()->type == GEO_NODE_VIEWER) {
+  if (node.typeinfo->type == GEO_NODE_VIEWER) {
     return true;
   }
   return socket.index() == 0;
 }
 
-static bool is_linked_to_viewer(const OutputSocketRef &socket, const NodeRef &viewer_node)
+static bool is_linked_to_viewer(const bNodeSocket &socket, const bNode &viewer_node)
 {
-  for (const InputSocketRef *target_socket : socket.directly_linked_sockets()) {
-    if (&target_socket->node() != &viewer_node) {
+  for (const bNodeSocket *target_socket : socket.directly_linked_sockets()) {
+    if (&target_socket->owner_node() != &viewer_node) {
       continue;
     }
     if (!target_socket->is_available()) {
@@ -561,39 +559,39 @@ static void remove_links_to_unavailable_viewer_sockets(bNodeTree &btree, bNode &
   }
 }
 
-static const NodeRef *get_existing_viewer(const NodeTreeRef &tree)
+static const bNode *get_existing_viewer(const bNodeTree &tree)
 {
-  Vector<const NodeRef *> viewer_nodes = find_viewer_nodes(tree);
+  Vector<const bNode *> viewer_nodes = find_viewer_nodes(tree);
 
   /* Check if there is already an active viewer node that should be used. */
-  for (const NodeRef *viewer_node : viewer_nodes) {
-    if (viewer_node->bnode()->flag & NODE_DO_OUTPUT) {
+  for (const bNode *viewer_node : viewer_nodes) {
+    if (viewer_node->flag & NODE_DO_OUTPUT) {
       return viewer_node;
     }
   }
 
   /* If no active but non-active viewers exist, make one active. */
   if (!viewer_nodes.is_empty()) {
-    viewer_nodes[0]->bnode()->flag |= NODE_DO_OUTPUT;
+    const_cast<bNode *>(viewer_nodes[0])->flag |= NODE_DO_OUTPUT;
     return viewer_nodes[0];
   }
   return nullptr;
 }
 
-static const OutputSocketRef *find_output_socket_to_be_viewed(const NodeRef *active_viewer_node,
-                                                              const NodeRef &node_to_view)
+static const bNodeSocket *find_output_socket_to_be_viewed(const bNode *active_viewer_node,
+                                                          const bNode &node_to_view)
 {
   /* Check if any of the output sockets is selected, which is the case when the user just clicked
    * on the socket. */
-  for (const OutputSocketRef *output_socket : node_to_view.outputs()) {
-    if (output_socket->bsocket()->flag & SELECT) {
+  for (const bNodeSocket *output_socket : node_to_view.output_sockets()) {
+    if (output_socket->flag & SELECT) {
       return output_socket;
     }
   }
 
-  const OutputSocketRef *last_socket_linked_to_viewer = nullptr;
+  const bNodeSocket *last_socket_linked_to_viewer = nullptr;
   if (active_viewer_node != nullptr) {
-    for (const OutputSocketRef *output_socket : node_to_view.outputs()) {
+    for (const bNodeSocket *output_socket : node_to_view.output_sockets()) {
       if (!socket_can_be_viewed(*output_socket)) {
         continue;
       }
@@ -604,7 +602,7 @@ static const OutputSocketRef *find_output_socket_to_be_viewed(const NodeRef *act
   }
   if (last_socket_linked_to_viewer == nullptr) {
     /* If no output is connected to a viewer, use the first output that can be viewed. */
-    for (const OutputSocketRef *output_socket : node_to_view.outputs()) {
+    for (const bNodeSocket *output_socket : node_to_view.output_sockets()) {
       if (socket_can_be_viewed(*output_socket)) {
         return output_socket;
       }
@@ -612,10 +610,10 @@ static const OutputSocketRef *find_output_socket_to_be_viewed(const NodeRef *act
   }
   else {
     /* Pick the next socket to be linked to the viewer. */
-    const int tot_outputs = node_to_view.outputs().size();
+    const int tot_outputs = node_to_view.output_sockets().size();
     for (const int offset : IndexRange(1, tot_outputs - 1)) {
       const int index = (last_socket_linked_to_viewer->index() + offset) % tot_outputs;
-      const OutputSocketRef &output_socket = node_to_view.output(index);
+      const bNodeSocket &output_socket = node_to_view.output_socket(index);
       if (!socket_can_be_viewed(output_socket)) {
         continue;
       }
@@ -682,20 +680,15 @@ static int node_link_viewer(const bContext &C, bNode &bnode_to_view)
 {
   SpaceNode &snode = *CTX_wm_space_node(&C);
   bNodeTree *btree = snode.edittree;
+  btree->ensure_topology_cache();
 
-  const NodeTreeRef tree{btree};
-  const NodeRef &node_to_view = *tree.find_node(bnode_to_view);
-  const NodeRef *active_viewer_node = get_existing_viewer(tree);
-
-  const OutputSocketRef *socket_to_view = find_output_socket_to_be_viewed(active_viewer_node,
-                                                                          node_to_view);
-  if (socket_to_view == nullptr) {
+  bNode *active_viewer_bnode = const_cast<bNode *>(get_existing_viewer(*btree));
+  bNodeSocket *bsocket_to_view = const_cast<bNodeSocket *>(
+      find_output_socket_to_be_viewed(active_viewer_bnode, bnode_to_view));
+  if (bsocket_to_view == nullptr) {
     return OPERATOR_FINISHED;
   }
-
-  bNodeSocket &bsocket_to_view = *socket_to_view->bsocket();
-  bNode *viewer_bnode = active_viewer_node ? active_viewer_node->bnode() : nullptr;
-  return link_socket_to_viewer(C, viewer_bnode, bnode_to_view, bsocket_to_view);
+  return link_socket_to_viewer(C, active_viewer_bnode, bnode_to_view, *bsocket_to_view);
 }
 
 /** \} */
@@ -2048,7 +2041,7 @@ static bNodeSocket *get_main_socket(bNodeTree &ntree, bNode &node, eNodeSocketIn
 
   /* Try to get the main socket based on the socket declaration. */
   nodeDeclarationEnsure(&ntree, &node);
-  const nodes::NodeDeclaration *node_decl = node.runtime->declaration;
+  const nodes::NodeDeclaration *node_decl = node.declaration();
   if (node_decl != nullptr) {
     Span<nodes::SocketDeclarationPtr> socket_decls = (in_out == SOCK_IN) ? node_decl->inputs() :
                                                                            node_decl->outputs();
diff --git a/source/blender/editors/space_outliner/outliner_collections.cc b/source/blender/editors/space_outliner/outliner_collections.cc
index 23ee8a2c3f2..a76a9bddea5 100644
--- a/source/blender/editors/space_outliner/outliner_collections.cc
+++ b/source/blender/editors/space_outliner/outliner_collections.cc
@@ -345,8 +345,12 @@ void outliner_collection_delete(
 
   /* We first walk over and find the Collections we actually want to delete
    * (ignoring duplicates). */
-  outliner_tree_traverse(
-      space_outliner, &space_outliner->tree, 0, TSE_SELECTED, collection_collect_data_to_edit, &data);
+  outliner_tree_traverse(space_outliner,
+                         &space_outliner->tree,
+                         0,
+                         TSE_SELECTED,
+                         collection_collect_data_to_edit,
+                         &data);
 
   /* Effectively delete the collections. */
   GSetIterator collections_to_edit_iter;
@@ -707,8 +711,12 @@ static int collection_link_exec(bContext *C, wmOperator *op)
   data.collections_to_edit = BLI_gset_ptr_new(__func__);
 
   /* We first walk over and find the Collections we actually want to link (ignoring duplicates). */
-  outliner_tree_traverse(
-      space_outliner, &space_outliner->tree, 0, TSE_SELECTED, collection_collect_data_to_edit, &data);
+  outliner_tree_traverse(space_outliner,
+                         &space_outliner->tree,
+                         0,
+                         TSE_SELECTED,
+                         collection_collect_data_to_edit,
+                         &data);
 
   /* Effectively link the collections. */
   GSetIterator collections_to_edit_iter;
@@ -766,8 +774,12 @@ static int collection_instance_exec(bContext *C, wmOperator *UNUSED(op))
 
   /* We first walk over and find the Collections we actually want to instance
    * (ignoring duplicates). */
-  outliner_tree_traverse(
-      space_outliner, &space_outliner->tree, 0, TSE_SELECTED, collection_collect_data_to_edit, &data);
+  outliner_tree_traverse(space_outliner,
+                         &space_outliner->tree,
+                         0,
+                         TSE_SELECTED,
+                         collection_collect_data_to_edit,
+                         &data);
 
   /* Find an active collection to add to, that doesn't give dependency cycles. */
   LayerCollection *active_lc = BKE_layer_collection_get_active(view_layer);
diff --git a/source/blender/editors/space_outliner/outliner_tools.cc b/source/blender/editors/space_outliner/outliner_tools.cc
index 69c88f3b874..a5fa8fb59e9 100644
--- a/source/blender/editors/space_outliner/outliner_tools.cc
+++ b/source/blender/editors/space_outliner/outliner_tools.cc
@@ -1276,7 +1276,7 @@ static void id_override_library_reset_fn(bContext *C,
   OutlinerLibOverrideData *data = static_cast<OutlinerLibOverrideData *>(user_data);
   const bool do_hierarchy = data->do_hierarchy;
 
-  if (!ID_IS_OVERRIDE_LIBRARY_REAL(id_root)) {
+  if (!ID_IS_OVERRIDE_LIBRARY_REAL(id_root) || ID_IS_LINKED(id_root)) {
     CLOG_WARN(&LOG, "Could not reset library override of data block '%s'", id_root->name);
     return;
   }
@@ -1304,7 +1304,7 @@ static void id_override_library_clear_single_fn(bContext *C,
   ViewLayer *view_layer = CTX_data_view_layer(C);
   ID *id = tselem->id;
 
-  if (!ID_IS_OVERRIDE_LIBRARY_REAL(id)) {
+  if (!ID_IS_OVERRIDE_LIBRARY_REAL(id) || ID_IS_LINKED(id)) {
     BKE_reportf(reports,
                 RPT_WARNING,
                 "Cannot clear embedded library override id '%s', only overrides of real "
@@ -1352,8 +1352,9 @@ static void id_override_library_resync_fn(bContext *UNUSED(C),
   ID *id_root = tselem->id;
   OutlinerLibOverrideData *data = static_cast<OutlinerLibOverrideData *>(user_data);
 
-  if (!ID_IS_OVERRIDE_LIBRARY_REAL(id_root)) {
+  if (!ID_IS_OVERRIDE_LIBRARY_REAL(id_root) || ID_IS_LINKED(id_root)) {
     CLOG_WARN(&LOG, "Could not resync library override of data block '%s'", id_root->name);
+    return;
   }
 
   if (id_root->override_library->hierarchy_root != nullptr) {
@@ -1401,7 +1402,7 @@ static void id_override_library_delete_hierarchy_fn(bContext *UNUSED(C),
   BLI_assert(TSE_IS_REAL_ID(tselem));
   ID *id_root = tselem->id;
 
-  if (!ID_IS_OVERRIDE_LIBRARY_REAL(id_root)) {
+  if (!ID_IS_OVERRIDE_LIBRARY_REAL(id_root) || ID_IS_LINKED(id_root)) {
     CLOG_WARN(&LOG, "Could not delete library override of data block '%s'", id_root->name);
     return;
   }
diff --git a/source/blender/freestyle/intern/blender_interface/BlenderStrokeRenderer.cpp b/source/blender/freestyle/intern/blender_interface/BlenderStrokeRenderer.cpp
index 7c46937bed2..6365dfe26a7 100644
--- a/source/blender/freestyle/intern/blender_interface/BlenderStrokeRenderer.cpp
+++ b/source/blender/freestyle/intern/blender_interface/BlenderStrokeRenderer.cpp
@@ -232,7 +232,7 @@ Material *BlenderStrokeRenderer::GetStrokeShader(Main *bmain,
   storage = (NodeShaderAttribute *)input_attr_color->storage;
   BLI_strncpy(storage->name, "Color", sizeof(storage->name));
 
-  bNode *mix_rgb_color = nodeAddStaticNode(nullptr, ntree, SH_NODE_MIX_RGB);
+  bNode *mix_rgb_color = nodeAddStaticNode(nullptr, ntree, SH_NODE_MIX_RGB_LEGACY);
   mix_rgb_color->custom1 = MA_RAMP_BLEND;  // Mix
   mix_rgb_color->locx = 200.0f;
   mix_rgb_color->locy = -200.0f;
@@ -246,7 +246,7 @@ Material *BlenderStrokeRenderer::GetStrokeShader(Main *bmain,
   storage = (NodeShaderAttribute *)input_attr_alpha->storage;
   BLI_strncpy(storage->name, "Alpha", sizeof(storage->name));
 
-  bNode *mix_rgb_alpha = nodeAddStaticNode(nullptr, ntree, SH_NODE_MIX_RGB);
+  bNode *mix_rgb_alpha = nodeAddStaticNode(nullptr, ntree, SH_NODE_MIX_RGB_LEGACY);
   mix_rgb_alpha->custom1 = MA_RAMP_BLEND;  // Mix
   mix_rgb_alpha->locx = 600.0f;
   mix_rgb_alpha->locy = 300.0f;
@@ -577,15 +577,15 @@ void BlenderStrokeRenderer::GenerateStrokeMesh(StrokeGroup *group, bool hasTex)
   mesh->totcol = group->materials.size();
 
   mesh->mvert = (MVert *)CustomData_add_layer(
-      &mesh->vdata, CD_MVERT, CD_CALLOC, nullptr, mesh->totvert);
+      &mesh->vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, mesh->totvert);
   mesh->medge = (MEdge *)CustomData_add_layer(
-      &mesh->edata, CD_MEDGE, CD_CALLOC, nullptr, mesh->totedge);
+      &mesh->edata, CD_MEDGE, CD_SET_DEFAULT, nullptr, mesh->totedge);
   mesh->mpoly = (MPoly *)CustomData_add_layer(
-      &mesh->pdata, CD_MPOLY, CD_CALLOC, nullptr, mesh->totpoly);
+      &mesh->pdata, CD_MPOLY, CD_SET_DEFAULT, nullptr, mesh->totpoly);
   mesh->mloop = (MLoop *)CustomData_add_layer(
-      &mesh->ldata, CD_MLOOP, CD_CALLOC, nullptr, mesh->totloop);
+      &mesh->ldata, CD_MLOOP, CD_SET_DEFAULT, nullptr, mesh->totloop);
   int *material_indices = (int *)CustomData_add_layer_named(
-      &mesh->pdata, CD_PROP_INT32, CD_DEFAULT, nullptr, mesh->totpoly, "material_index");
+      &mesh->pdata, CD_PROP_INT32, CD_SET_DEFAULT, nullptr, mesh->totpoly, "material_index");
   MVert *vertices = mesh->mvert;
   MEdge *edges = mesh->medge;
   MPoly *polys = mesh->mpoly;
@@ -595,14 +595,14 @@ void BlenderStrokeRenderer::GenerateStrokeMesh(StrokeGroup *group, bool hasTex)
   if (hasTex) {
     // First UV layer
     CustomData_add_layer_named(
-        &mesh->ldata, CD_MLOOPUV, CD_CALLOC, nullptr, mesh->totloop, uvNames[0]);
+        &mesh->ldata, CD_MLOOPUV, CD_SET_DEFAULT, nullptr, mesh->totloop, uvNames[0]);
     CustomData_set_layer_active(&mesh->ldata, CD_MLOOPUV, 0);
     BKE_mesh_update_customdata_pointers(mesh, true);
     loopsuv[0] = mesh->mloopuv;
 
     // Second UV layer
     CustomData_add_layer_named(
-        &mesh->ldata, CD_MLOOPUV, CD_CALLOC, nullptr, mesh->totloop, uvNames[1]);
+        &mesh->ldata, CD_MLOOPUV, CD_SET_DEFAULT, nullptr, mesh->totloop, uvNames[1]);
     CustomData_set_layer_active(&mesh->ldata, CD_MLOOPUV, 1);
     BKE_mesh_update_customdata_pointers(mesh, true);
     loopsuv[1] = mesh->mloopuv;
@@ -610,9 +610,9 @@ void BlenderStrokeRenderer::GenerateStrokeMesh(StrokeGroup *group, bool hasTex)
 
   // colors and transparency (the latter represented by grayscale colors)
   MLoopCol *colors = (MLoopCol *)CustomData_add_layer_named(
-      &mesh->ldata, CD_PROP_BYTE_COLOR, CD_CALLOC, nullptr, mesh->totloop, "Color");
+      &mesh->ldata, CD_PROP_BYTE_COLOR, CD_SET_DEFAULT, nullptr, mesh->totloop, "Color");
   MLoopCol *transp = (MLoopCol *)CustomData_add_layer_named(
-      &mesh->ldata, CD_PROP_BYTE_COLOR, CD_CALLOC, nullptr, mesh->totloop, "Alpha");
+      &mesh->ldata, CD_PROP_BYTE_COLOR, CD_SET_DEFAULT, nullptr, mesh->totloop, "Alpha");
   mesh->mloopcol = colors;
 
   mesh->mat = (Material **)MEM_mallocN(sizeof(Material *) * mesh->totcol, "MaterialList");
diff --git a/source/blender/geometry/intern/reverse_uv_sampler.cc b/source/blender/geometry/intern/reverse_uv_sampler.cc
index 39fec40333c..f66e4a3ac2e 100644
--- a/source/blender/geometry/intern/reverse_uv_sampler.cc
+++ b/source/blender/geometry/intern/reverse_uv_sampler.cc
@@ -50,6 +50,11 @@ ReverseUVSampler::Result ReverseUVSampler::sample(const float2 &query_uv) const
   float3 best_bary_weights;
   const MLoopTri *best_looptri;
 
+  /* The distance to an edge that is allowed to be inside or outside the triangle. Without this,
+   * the lookup can fail for floating point accuracy reasons when the uv is almost exact on an
+   * edge. */
+  const float edge_epsilon = 0.00001f;
+
   for (const int looptri_index : looptri_indices) {
     const MLoopTri &looptri = looptris_[looptri_index];
     const float2 &uv_0 = uv_map_[looptri.tri[0]];
@@ -68,8 +73,12 @@ ReverseUVSampler::Result ReverseUVSampler::sample(const float2 &query_uv) const
     const float dist = MAX3(x_dist, y_dist, z_dist);
 
     if (dist <= 0.0f && best_dist <= 0.0f) {
-      /* The uv sample is in multiple triangles. */
-      return Result{ResultType::Multiple};
+      const float worse_dist = std::max(dist, best_dist);
+      /* Allow ignoring multiple triangle intersections if the uv is almost exactly on an edge. */
+      if (worse_dist < -edge_epsilon) {
+        /* The uv sample is in multiple triangles. */
+        return Result{ResultType::Multiple};
+      }
     }
 
     if (dist < best_dist) {
@@ -79,8 +88,9 @@ ReverseUVSampler::Result ReverseUVSampler::sample(const float2 &query_uv) const
     }
   }
 
-  /* Allow for a small epsilon in case the uv is on th edge. */
-  if (best_dist < 0.00001f) {
+  /* Allow using the closest (but not intersecting) triangle if the uv is almost exactly on an
+   * edge. */
+  if (best_dist < edge_epsilon) {
     return Result{ResultType::Ok, best_looptri, math::clamp(best_bary_weights, 0.0f, 1.0f)};
   }
 
diff --git a/source/blender/gpencil_modifiers/intern/lineart/MOD_lineart.h b/source/blender/gpencil_modifiers/intern/lineart/MOD_lineart.h
index ad0dd8a030a..ae013a7dd02 100644
--- a/source/blender/gpencil_modifiers/intern/lineart/MOD_lineart.h
+++ b/source/blender/gpencil_modifiers/intern/lineart/MOD_lineart.h
@@ -84,6 +84,7 @@ typedef struct LineartElementLinkNode {
 
   /* For edge element link nodes, used for shadow edge matching. */
   int obindex;
+  int global_index_offset;
 
   /** Per object value, always set, if not enabled by #ObjectLineArt, then it's set to global. */
   float crease_threshold;
@@ -205,6 +206,10 @@ typedef struct LineartEdgeChain {
   uint8_t intersection_mask;
   uint32_t shadow_mask_bits;
 
+  /* We need local index for correct weight transfer, line art index is global, thus
+   * local_index=lineart_index-index_offset. */
+  uint32_t index_offset;
+
   struct Object *object_ref;
   struct Object *silhouette_backdrop;
 } LineartEdgeChain;
@@ -865,6 +870,7 @@ void MOD_lineart_chain_find_silhouette_backdrop_objects(LineartData *ld);
 
 int MOD_lineart_chain_count(const LineartEdgeChain *ec);
 void MOD_lineart_chain_clear_picked_flag(LineartCache *lc);
+void MOD_lineart_finalize_chains(LineartData *ld);
 
 /**
  * This is the entry point of all line art calculations.
diff --git a/source/blender/gpencil_modifiers/intern/lineart/lineart_chain.c b/source/blender/gpencil_modifiers/intern/lineart/lineart_chain.c
index 7c8e0c5a6f5..f32141a31eb 100644
--- a/source/blender/gpencil_modifiers/intern/lineart/lineart_chain.c
+++ b/source/blender/gpencil_modifiers/intern/lineart/lineart_chain.c
@@ -1051,6 +1051,38 @@ void MOD_lineart_chain_clear_picked_flag(LineartCache *lc)
   }
 }
 
+LineartElementLinkNode *lineart_find_matching_eln_obj(ListBase *elns, struct Object *obj)
+{
+  LISTBASE_FOREACH (LineartElementLinkNode *, eln, elns) {
+    if (eln->object_ref == obj) {
+      return eln;
+    }
+  }
+  return NULL;
+}
+
+void MOD_lineart_finalize_chains(LineartData *ld)
+{
+  LISTBASE_FOREACH (LineartEdgeChain *, ec, &ld->chains) {
+    if (ELEM(ec->type,
+             LRT_EDGE_FLAG_INTERSECTION,
+             LRT_EDGE_FLAG_PROJECTED_SHADOW,
+             LRT_EDGE_FLAG_LIGHT_CONTOUR)) {
+      continue;
+    }
+    LineartElementLinkNode *eln = lineart_find_matching_eln_obj(&ld->geom.vertex_buffer_pointers,
+                                                                ec->object_ref);
+    BLI_assert(eln != NULL);
+    if (LIKELY(eln)) {
+      LISTBASE_FOREACH (LineartEdgeChainItem *, eci, &ec->chain) {
+        if (eci->index > eln->global_index_offset) {
+          eci->index -= eln->global_index_offset;
+        }
+      }
+    }
+  }
+}
+
 void MOD_lineart_smooth_chains(LineartData *ld, float tolerance)
 {
   LISTBASE_FOREACH (LineartEdgeChain *, ec, &ld->chains) {
diff --git a/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c b/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c
index bde15515cb7..5bca49f632c 100644
--- a/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c
+++ b/source/blender/gpencil_modifiers/intern/lineart/lineart_cpu.c
@@ -2660,6 +2660,7 @@ void lineart_main_load_geometries(Depsgraph *depsgraph,
       }
       LineartVert *v = (LineartVert *)obi->v_eln->pointer;
       int v_count = obi->v_eln->element_count;
+      obi->v_eln->global_index_offset = global_i;
       for (int vi = 0; vi < v_count; vi++) {
         v[vi].index += global_i;
       }
@@ -5114,6 +5115,8 @@ bool MOD_lineart_compute_feature_lines(Depsgraph *depsgraph,
 
     /* At last, we need to clear flags so we don't confuse GPencil generation calls. */
     MOD_lineart_chain_clear_picked_flag(lc);
+
+    MOD_lineart_finalize_chains(ld);
   }
 
   lineart_mem_destroy(&lc->shadow_data_pool);
diff --git a/source/blender/gpencil_modifiers/intern/lineart/lineart_intern.h b/source/blender/gpencil_modifiers/intern/lineart/lineart_intern.h
index 3668f1dc6d7..947586aaec4 100644
--- a/source/blender/gpencil_modifiers/intern/lineart/lineart_intern.h
+++ b/source/blender/gpencil_modifiers/intern/lineart/lineart_intern.h
@@ -133,6 +133,7 @@ void lineart_main_transform_and_add_shadow(struct LineartData *ld,
                                            struct LineartElementLinkNode *eeln);
 
 LineartElementLinkNode *lineart_find_matching_eln(struct ListBase *shadow_elns, int obindex);
+LineartElementLinkNode *lineart_find_matching_eln_obj(struct ListBase *elns, struct Object *ob);
 LineartEdge *lineart_find_matching_edge(struct LineartElementLinkNode *shadow_eln,
                                         uint64_t edge_identifier);
 void lineart_register_shadow_cuts(struct LineartData *ld,
diff --git a/source/blender/gpu/CMakeLists.txt b/source/blender/gpu/CMakeLists.txt
index 0c11ecb293b..c289a21421a 100644
--- a/source/blender/gpu/CMakeLists.txt
+++ b/source/blender/gpu/CMakeLists.txt
@@ -394,6 +394,7 @@ set(GLSL_SRC
   shaders/material/gpu_shader_material_light_path.glsl
   shaders/material/gpu_shader_material_mapping.glsl
   shaders/material/gpu_shader_material_map_range.glsl
+  shaders/material/gpu_shader_material_mix_color.glsl
   shaders/material/gpu_shader_material_mix_shader.glsl
   shaders/material/gpu_shader_material_noise.glsl
   shaders/material/gpu_shader_material_normal.glsl
diff --git a/source/blender/gpu/GPU_batch.h b/source/blender/gpu/GPU_batch.h
index c085b592a77..8f524f72fa1 100644
--- a/source/blender/gpu/GPU_batch.h
+++ b/source/blender/gpu/GPU_batch.h
@@ -164,6 +164,13 @@ void GPU_batch_program_set_builtin_with_config(GPUBatch *batch,
 #define GPU_batch_texture_bind(batch, name, tex) \
   GPU_texture_bind(tex, GPU_shader_get_texture_binding((batch)->shader, name));
 
+/**
+ * Return indirect draw call parameters for this batch.
+ * NOTE: r_base_index is set to -1 if not using an index buffer.
+ */
+void GPU_batch_draw_parameter_get(
+    GPUBatch *batch, int *r_v_count, int *r_v_first, int *r_base_index, int *r_i_count);
+
 void GPU_batch_draw(GPUBatch *batch);
 void GPU_batch_draw_range(GPUBatch *batch, int v_first, int v_count);
 /**
@@ -180,7 +187,9 @@ void GPU_batch_draw_advanced(GPUBatch *batch, int v_first, int v_count, int i_fi
  * Issue a draw call using GPU computed arguments. The argument are expected to be valid for the
  * type of geometry drawn (index or non-indexed).
  */
-void GPU_batch_draw_indirect(GPUBatch *batch, GPUStorageBuf *indirect_buf);
+void GPU_batch_draw_indirect(GPUBatch *batch, GPUStorageBuf *indirect_buf, intptr_t offset);
+void GPU_batch_multi_draw_indirect(
+    GPUBatch *batch, GPUStorageBuf *indirect_buf, int count, intptr_t offset, intptr_t stride);
 
 #if 0 /* future plans */
 
diff --git a/source/blender/gpu/GPU_capabilities.h b/source/blender/gpu/GPU_capabilities.h
index 7fe467de402..aa01f446b9b 100644
--- a/source/blender/gpu/GPU_capabilities.h
+++ b/source/blender/gpu/GPU_capabilities.h
@@ -47,6 +47,7 @@ bool GPU_crappy_amd_driver(void);
 bool GPU_compute_shader_support(void);
 bool GPU_shader_storage_buffer_objects_support(void);
 bool GPU_shader_image_load_store_support(void);
+bool GPU_shader_draw_parameters_support(void);
 
 bool GPU_mem_stats_supported(void);
 void GPU_mem_stats_get(int *totalmem, int *freemem);
diff --git a/source/blender/gpu/GPU_material.h b/source/blender/gpu/GPU_material.h
index 1ab06f3369d..51438d7909f 100644
--- a/source/blender/gpu/GPU_material.h
+++ b/source/blender/gpu/GPU_material.h
@@ -228,6 +228,7 @@ void GPU_materials_free(struct Main *bmain);
 struct Scene *GPU_material_scene(GPUMaterial *material);
 struct GPUPass *GPU_material_get_pass(GPUMaterial *material);
 struct GPUShader *GPU_material_get_shader(GPUMaterial *material);
+const char *GPU_material_get_name(GPUMaterial *material);
 /**
  * Return can be NULL if it's a world material.
  */
diff --git a/source/blender/gpu/GPU_storage_buffer.h b/source/blender/gpu/GPU_storage_buffer.h
index ca6a848786b..8837a7c7647 100644
--- a/source/blender/gpu/GPU_storage_buffer.h
+++ b/source/blender/gpu/GPU_storage_buffer.h
@@ -48,6 +48,13 @@ void GPU_storagebuf_clear(GPUStorageBuf *ssbo,
 void GPU_storagebuf_clear_to_zero(GPUStorageBuf *ssbo);
 
 /**
+ * Read back content of the buffer to CPU for inspection.
+ * Slow! Only use for inspection / debugging.
+ * NOTE: Not synchronized. Use appropriate barrier before reading.
+ */
+void GPU_storagebuf_read(GPUStorageBuf *ssbo, void *data);
+
+/**
  * \brief Copy a part of a vertex buffer to a storage buffer.
  *
  * \param ssbo: destination storage buffer
diff --git a/source/blender/gpu/GPU_texture.h b/source/blender/gpu/GPU_texture.h
index 30e890b1591..8b54f4c9822 100644
--- a/source/blender/gpu/GPU_texture.h
+++ b/source/blender/gpu/GPU_texture.h
@@ -49,7 +49,12 @@ typedef enum eGPUSamplerState {
  * #GPU_SAMPLER_MAX is not a valid enum value, but only a limit.
  * It also creates a bad mask for the `NOT` operator in #ENUM_OPERATORS.
  */
+#ifdef __cplusplus
+static constexpr eGPUSamplerState GPU_SAMPLER_MAX = eGPUSamplerState(GPU_SAMPLER_ICON + 1);
+#else
 static const int GPU_SAMPLER_MAX = (GPU_SAMPLER_ICON + 1);
+#endif
+
 ENUM_OPERATORS(eGPUSamplerState, GPU_SAMPLER_ICON)
 
 #ifdef __cplusplus
diff --git a/source/blender/gpu/intern/gpu_batch.cc b/source/blender/gpu/intern/gpu_batch.cc
index 0b47a7b2952..9092ad5110c 100644
--- a/source/blender/gpu/intern/gpu_batch.cc
+++ b/source/blender/gpu/intern/gpu_batch.cc
@@ -220,6 +220,30 @@ void GPU_batch_set_shader(GPUBatch *batch, GPUShader *shader)
 /** \name Drawing / Drawcall functions
  * \{ */
 
+void GPU_batch_draw_parameter_get(
+    GPUBatch *gpu_batch, int *r_v_count, int *r_v_first, int *r_base_index, int *r_i_count)
+{
+  Batch *batch = static_cast<Batch *>(gpu_batch);
+
+  if (batch->elem) {
+    *r_v_count = batch->elem_()->index_len_get();
+    *r_v_first = batch->elem_()->index_start_get();
+    *r_base_index = batch->elem_()->index_base_get();
+  }
+  else {
+    *r_v_count = batch->verts_(0)->vertex_len;
+    *r_v_first = 0;
+    *r_base_index = -1;
+  }
+
+  int i_count = (batch->inst[0]) ? batch->inst_(0)->vertex_len : 1;
+  /* Meh. This is to be able to use different numbers of verts in instance VBO's. */
+  if (batch->inst[1] != nullptr) {
+    i_count = min_ii(i_count, batch->inst_(1)->vertex_len);
+  }
+  *r_i_count = i_count;
+}
+
 void GPU_batch_draw(GPUBatch *batch)
 {
   GPU_shader_bind(batch->shader);
@@ -270,13 +294,23 @@ void GPU_batch_draw_advanced(
   batch->draw(v_first, v_count, i_first, i_count);
 }
 
-void GPU_batch_draw_indirect(GPUBatch *gpu_batch, GPUStorageBuf *indirect_buf)
+void GPU_batch_draw_indirect(GPUBatch *gpu_batch, GPUStorageBuf *indirect_buf, intptr_t offset)
+{
+  BLI_assert(Context::get()->shader != nullptr);
+  BLI_assert(indirect_buf != nullptr);
+  Batch *batch = static_cast<Batch *>(gpu_batch);
+
+  batch->draw_indirect(indirect_buf, offset);
+}
+
+void GPU_batch_multi_draw_indirect(
+    GPUBatch *gpu_batch, GPUStorageBuf *indirect_buf, int count, intptr_t offset, intptr_t stride)
 {
   BLI_assert(Context::get()->shader != nullptr);
   BLI_assert(indirect_buf != nullptr);
   Batch *batch = static_cast<Batch *>(gpu_batch);
 
-  batch->draw_indirect(indirect_buf);
+  batch->multi_draw_indirect(indirect_buf, count, offset, stride);
 }
 
 /** \} */
diff --git a/source/blender/gpu/intern/gpu_batch_private.hh b/source/blender/gpu/intern/gpu_batch_private.hh
index 8ca19884fd7..59646925d68 100644
--- a/source/blender/gpu/intern/gpu_batch_private.hh
+++ b/source/blender/gpu/intern/gpu_batch_private.hh
@@ -29,7 +29,11 @@ class Batch : public GPUBatch {
   virtual ~Batch() = default;
 
   virtual void draw(int v_first, int v_count, int i_first, int i_count) = 0;
-  virtual void draw_indirect(GPUStorageBuf *indirect_buf) = 0;
+  virtual void draw_indirect(GPUStorageBuf *indirect_buf, intptr_t offset) = 0;
+  virtual void multi_draw_indirect(GPUStorageBuf *indirect_buf,
+                                   int count,
+                                   intptr_t offset,
+                                   intptr_t stride) = 0;
 
   /* Convenience casts. */
   IndexBuf *elem_() const
diff --git a/source/blender/gpu/intern/gpu_capabilities.cc b/source/blender/gpu/intern/gpu_capabilities.cc
index 18748627b83..73f94ecfb1b 100644
--- a/source/blender/gpu/intern/gpu_capabilities.cc
+++ b/source/blender/gpu/intern/gpu_capabilities.cc
@@ -161,6 +161,11 @@ bool GPU_shader_image_load_store_support()
   return GCaps.shader_image_load_store_support;
 }
 
+bool GPU_shader_draw_parameters_support()
+{
+  return GCaps.shader_draw_parameters_support;
+}
+
 int GPU_max_shader_storage_buffer_bindings()
 {
   return GCaps.max_shader_storage_buffer_bindings;
diff --git a/source/blender/gpu/intern/gpu_capabilities_private.hh b/source/blender/gpu/intern/gpu_capabilities_private.hh
index a17dbe7f8e6..dadd14791e7 100644
--- a/source/blender/gpu/intern/gpu_capabilities_private.hh
+++ b/source/blender/gpu/intern/gpu_capabilities_private.hh
@@ -44,6 +44,7 @@ struct GPUCapabilities {
   bool compute_shader_support = false;
   bool shader_storage_buffer_objects_support = false;
   bool shader_image_load_store_support = false;
+  bool shader_draw_parameters_support = false;
   bool transform_feedback_support = false;
 
   /* OpenGL related workarounds. */
diff --git a/source/blender/gpu/intern/gpu_codegen.cc b/source/blender/gpu/intern/gpu_codegen.cc
index 2e1cb6b4a22..b6194c0816f 100644
--- a/source/blender/gpu/intern/gpu_codegen.cc
+++ b/source/blender/gpu/intern/gpu_codegen.cc
@@ -356,21 +356,22 @@ void GPUCodegen::generate_resources()
   std::stringstream ss;
 
   /* Textures. */
+  int slot = 0;
   LISTBASE_FOREACH (GPUMaterialTexture *, tex, &graph.textures) {
     if (tex->colorband) {
       const char *name = info.name_buffer.append_sampler_name(tex->sampler_name);
-      info.sampler(0, ImageType::FLOAT_1D_ARRAY, name, Frequency::BATCH);
+      info.sampler(slot++, ImageType::FLOAT_1D_ARRAY, name, Frequency::BATCH);
     }
     else if (tex->tiled_mapping_name[0] != '\0') {
       const char *name = info.name_buffer.append_sampler_name(tex->sampler_name);
-      info.sampler(0, ImageType::FLOAT_2D_ARRAY, name, Frequency::BATCH);
+      info.sampler(slot++, ImageType::FLOAT_2D_ARRAY, name, Frequency::BATCH);
 
       const char *name_mapping = info.name_buffer.append_sampler_name(tex->tiled_mapping_name);
-      info.sampler(0, ImageType::FLOAT_1D_ARRAY, name_mapping, Frequency::BATCH);
+      info.sampler(slot++, ImageType::FLOAT_1D_ARRAY, name_mapping, Frequency::BATCH);
     }
     else {
       const char *name = info.name_buffer.append_sampler_name(tex->sampler_name);
-      info.sampler(0, ImageType::FLOAT_2D, name, Frequency::BATCH);
+      info.sampler(slot++, ImageType::FLOAT_2D, name, Frequency::BATCH);
     }
   }
 
@@ -383,7 +384,7 @@ void GPUCodegen::generate_resources()
     }
     ss << "};\n\n";
 
-    info.uniform_buf(0, "NodeTree", GPU_UBO_BLOCK_NAME, Frequency::BATCH);
+    info.uniform_buf(1, "NodeTree", GPU_UBO_BLOCK_NAME, Frequency::BATCH);
   }
 
   if (!BLI_listbase_is_empty(&graph.uniform_attrs.list)) {
@@ -395,7 +396,7 @@ void GPUCodegen::generate_resources()
 
     /* TODO(fclem): Use the macro for length. Currently not working for EEVEE. */
     /* DRW_RESOURCE_CHUNK_LEN = 512 */
-    info.uniform_buf(0, "UniformAttrs", GPU_ATTRIBUTE_UBO_BLOCK_NAME "[512]", Frequency::BATCH);
+    info.uniform_buf(2, "UniformAttrs", GPU_ATTRIBUTE_UBO_BLOCK_NAME "[512]", Frequency::BATCH);
   }
 
   info.typedef_source_generated = ss.str();
diff --git a/source/blender/gpu/intern/gpu_index_buffer_private.hh b/source/blender/gpu/intern/gpu_index_buffer_private.hh
index 6ce62ae852e..84903b05273 100644
--- a/source/blender/gpu/intern/gpu_index_buffer_private.hh
+++ b/source/blender/gpu/intern/gpu_index_buffer_private.hh
@@ -70,6 +70,14 @@ class IndexBuf {
      * They can lead to graphical glitches on some systems. (See T96892) */
     return is_empty_ ? 0 : index_len_;
   }
+  uint32_t index_start_get() const
+  {
+    return index_start_;
+  }
+  uint32_t index_base_get() const
+  {
+    return index_base_;
+  }
   /* Return size in byte of the drawable data buffer range. Actual buffer size might be bigger. */
   size_t size_get() const
   {
diff --git a/source/blender/gpu/intern/gpu_material.c b/source/blender/gpu/intern/gpu_material.c
index a4842ef0e43..d9045a041b6 100644
--- a/source/blender/gpu/intern/gpu_material.c
+++ b/source/blender/gpu/intern/gpu_material.c
@@ -91,6 +91,8 @@ struct GPUMaterial {
 
 #ifndef NDEBUG
   char name[64];
+#else
+  char name[16];
 #endif
 };
 
@@ -193,6 +195,11 @@ GPUShader *GPU_material_get_shader(GPUMaterial *material)
   return material->pass ? GPU_pass_shader_get(material->pass) : NULL;
 }
 
+const char *GPU_material_get_name(GPUMaterial *material)
+{
+  return material->name;
+}
+
 Material *GPU_material_get_material(GPUMaterial *material)
 {
   return material->ma;
@@ -205,12 +212,7 @@ GPUUniformBuf *GPU_material_uniform_buffer_get(GPUMaterial *material)
 
 void GPU_material_uniform_buffer_create(GPUMaterial *material, ListBase *inputs)
 {
-#ifndef NDEBUG
-  const char *name = material->name;
-#else
-  const char *name = "Material";
-#endif
-  material->ubo = GPU_uniformbuf_create_from_list(inputs, name);
+  material->ubo = GPU_uniformbuf_create_from_list(inputs, material->name);
 }
 
 ListBase GPU_material_attributes(GPUMaterial *material)
@@ -672,11 +674,7 @@ GPUMaterial *GPU_material_from_nodetree(Scene *scene,
   mat->graph.used_libraries = BLI_gset_new(
       BLI_ghashutil_ptrhash, BLI_ghashutil_ptrcmp, "GPUNodeGraph.used_libraries");
   mat->refcount = 1;
-#ifndef NDEBUG
   STRNCPY(mat->name, name);
-#else
-  UNUSED_VARS(name);
-#endif
   if (is_lookdev) {
     mat->flag |= GPU_MATFLAG_LOOKDEV_HACK;
   }
diff --git a/source/blender/gpu/intern/gpu_storage_buffer.cc b/source/blender/gpu/intern/gpu_storage_buffer.cc
index afa27da9c85..460a643089c 100644
--- a/source/blender/gpu/intern/gpu_storage_buffer.cc
+++ b/source/blender/gpu/intern/gpu_storage_buffer.cc
@@ -109,4 +109,9 @@ void GPU_storagebuf_copy_sub_from_vertbuf(
   unwrap(ssbo)->copy_sub(unwrap(src), dst_offset, src_offset, copy_size);
 }
 
+void GPU_storagebuf_read(GPUStorageBuf *ssbo, void *data)
+{
+  unwrap(ssbo)->read(data);
+}
+
 /** \} */
diff --git a/source/blender/gpu/intern/gpu_storage_buffer_private.hh b/source/blender/gpu/intern/gpu_storage_buffer_private.hh
index 9baec0c2a77..0c96f97ad30 100644
--- a/source/blender/gpu/intern/gpu_storage_buffer_private.hh
+++ b/source/blender/gpu/intern/gpu_storage_buffer_private.hh
@@ -44,6 +44,7 @@ class StorageBuf {
                      eGPUDataFormat data_format,
                      void *data) = 0;
   virtual void copy_sub(VertBuf *src, uint dst_offset, uint src_offset, uint copy_size) = 0;
+  virtual void read(void *data) = 0;
 };
 
 /* Syntactic sugar. */
diff --git a/source/blender/gpu/metal/mtl_backend.mm b/source/blender/gpu/metal/mtl_backend.mm
index 83cf3af0804..a15da4df083 100644
--- a/source/blender/gpu/metal/mtl_backend.mm
+++ b/source/blender/gpu/metal/mtl_backend.mm
@@ -381,6 +381,8 @@ void MTLBackend::capabilities_init(MTLContext *ctx)
   GCaps.shader_image_load_store_support = ([device supportsFamily:MTLGPUFamilyApple3] ||
                                            MTLBackend::capabilities.supports_family_mac1 ||
                                            MTLBackend::capabilities.supports_family_mac2);
+  /* TODO(Metal): Add support? */
+  GCaps.shader_draw_parameters_support = false;
   GCaps.compute_shader_support = false; /* TODO(Metal): Add compute support. */
   GCaps.shader_storage_buffer_objects_support =
       false; /* TODO(Metal): implement Storage Buffer support. */
diff --git a/source/blender/gpu/opengl/gl_backend.cc b/source/blender/gpu/opengl/gl_backend.cc
index 6a1577fb907..24ca8c25bc0 100644
--- a/source/blender/gpu/opengl/gl_backend.cc
+++ b/source/blender/gpu/opengl/gl_backend.cc
@@ -227,6 +227,7 @@ static void detect_workarounds()
     GLContext::unused_fb_slot_workaround = true;
     /* Turn off extensions. */
     GCaps.shader_image_load_store_support = false;
+    GCaps.shader_draw_parameters_support = false;
     GCaps.shader_storage_buffer_objects_support = false;
     GLContext::base_instance_support = false;
     GLContext::clear_texture_support = false;
@@ -271,6 +272,7 @@ static void detect_workarounds()
     GLContext::unused_fb_slot_workaround = true;
     GCaps.mip_render_workaround = true;
     GCaps.shader_image_load_store_support = false;
+    GCaps.shader_draw_parameters_support = false;
     GCaps.broken_amd_driver = true;
   }
   /* Compute shaders have some issues with those versions (see T94936). */
@@ -284,12 +286,14 @@ static void detect_workarounds()
        strstr(renderer, "AMD TAHITI"))) {
     GLContext::unused_fb_slot_workaround = true;
     GCaps.shader_image_load_store_support = false;
+    GCaps.shader_draw_parameters_support = false;
     GCaps.broken_amd_driver = true;
   }
   /* Fix slowdown on this particular driver. (see T77641) */
   if (GPU_type_matches(GPU_DEVICE_ATI, GPU_OS_UNIX, GPU_DRIVER_OPENSOURCE) &&
       strstr(version, "Mesa 19.3.4")) {
     GCaps.shader_image_load_store_support = false;
+    GCaps.shader_draw_parameters_support = false;
     GCaps.broken_amd_driver = true;
   }
   /* See T82856: AMD drivers since 20.11 running on a polaris architecture doesn't support the
@@ -492,6 +496,7 @@ void GLBackend::capabilities_init()
   GCaps.mem_stats_support = epoxy_has_gl_extension("GL_NVX_gpu_memory_info") ||
                             epoxy_has_gl_extension("GL_ATI_meminfo");
   GCaps.shader_image_load_store_support = epoxy_has_gl_extension("GL_ARB_shader_image_load_store");
+  GCaps.shader_draw_parameters_support = epoxy_has_gl_extension("GL_ARB_shader_draw_parameters");
   GCaps.compute_shader_support = epoxy_has_gl_extension("GL_ARB_compute_shader") &&
                                  epoxy_gl_version() >= 43;
   if (GCaps.compute_shader_support) {
diff --git a/source/blender/gpu/opengl/gl_batch.cc b/source/blender/gpu/opengl/gl_batch.cc
index 4ec86b98cbe..ff8867fe3e6 100644
--- a/source/blender/gpu/opengl/gl_batch.cc
+++ b/source/blender/gpu/opengl/gl_batch.cc
@@ -327,12 +327,13 @@ void GLBatch::draw(int v_first, int v_count, int i_first, int i_count)
   }
 }
 
-void GLBatch::draw_indirect(GPUStorageBuf *indirect_buf)
+void GLBatch::draw_indirect(GPUStorageBuf *indirect_buf, intptr_t offset)
 {
   GL_CHECK_RESOURCES("Batch");
 
   this->bind(0);
 
+  /* TODO(fclem): Make the barrier and binding optional if consecutive draws are issued. */
   dynamic_cast<GLStorageBuf *>(unwrap(indirect_buf))->bind_as(GL_DRAW_INDIRECT_BUFFER);
   /* This barrier needs to be here as it only work on the currently bound indirect buffer. */
   glMemoryBarrier(GL_COMMAND_BARRIER_BIT);
@@ -341,10 +342,37 @@ void GLBatch::draw_indirect(GPUStorageBuf *indirect_buf)
   if (elem) {
     const GLIndexBuf *el = this->elem_();
     GLenum index_type = to_gl(el->index_type_);
-    glDrawElementsIndirect(gl_type, index_type, (GLvoid *)nullptr);
+    glDrawElementsIndirect(gl_type, index_type, (GLvoid *)offset);
   }
   else {
-    glDrawArraysIndirect(gl_type, (GLvoid *)nullptr);
+    glDrawArraysIndirect(gl_type, (GLvoid *)offset);
+  }
+  /* Unbind. */
+  glBindBuffer(GL_DRAW_INDIRECT_BUFFER, 0);
+}
+
+void GLBatch::multi_draw_indirect(GPUStorageBuf *indirect_buf,
+                                  int count,
+                                  intptr_t offset,
+                                  intptr_t stride)
+{
+  GL_CHECK_RESOURCES("Batch");
+
+  this->bind(0);
+
+  /* TODO(fclem): Make the barrier and binding optional if consecutive draws are issued. */
+  dynamic_cast<GLStorageBuf *>(unwrap(indirect_buf))->bind_as(GL_DRAW_INDIRECT_BUFFER);
+  /* This barrier needs to be here as it only work on the currently bound indirect buffer. */
+  glMemoryBarrier(GL_COMMAND_BARRIER_BIT);
+
+  GLenum gl_type = to_gl(prim_type);
+  if (elem) {
+    const GLIndexBuf *el = this->elem_();
+    GLenum index_type = to_gl(el->index_type_);
+    glMultiDrawElementsIndirect(gl_type, index_type, (GLvoid *)offset, count, stride);
+  }
+  else {
+    glMultiDrawArraysIndirect(gl_type, (GLvoid *)offset, count, stride);
   }
   /* Unbind. */
   glBindBuffer(GL_DRAW_INDIRECT_BUFFER, 0);
diff --git a/source/blender/gpu/opengl/gl_batch.hh b/source/blender/gpu/opengl/gl_batch.hh
index 0d7ea7c4a9e..714aa1220be 100644
--- a/source/blender/gpu/opengl/gl_batch.hh
+++ b/source/blender/gpu/opengl/gl_batch.hh
@@ -91,7 +91,11 @@ class GLBatch : public Batch {
 
  public:
   void draw(int v_first, int v_count, int i_first, int i_count) override;
-  void draw_indirect(GPUStorageBuf *indirect_buf) override;
+  void draw_indirect(GPUStorageBuf *indirect_buf, intptr_t offset) override;
+  void multi_draw_indirect(GPUStorageBuf *indirect_buf,
+                           int count,
+                           intptr_t offset,
+                           intptr_t stride) override;
   void bind(int i_first);
 
   /* Convenience getters. */
diff --git a/source/blender/gpu/opengl/gl_storage_buffer.cc b/source/blender/gpu/opengl/gl_storage_buffer.cc
index 83a56edcf04..5d876308b3c 100644
--- a/source/blender/gpu/opengl/gl_storage_buffer.cc
+++ b/source/blender/gpu/opengl/gl_storage_buffer.cc
@@ -166,6 +166,23 @@ void GLStorageBuf::copy_sub(VertBuf *src_, uint dst_offset, uint src_offset, uin
   }
 }
 
+void GLStorageBuf::read(void *data)
+{
+  if (ssbo_id_ == 0) {
+    this->init();
+  }
+
+  if (GLContext::direct_state_access_support) {
+    glGetNamedBufferSubData(ssbo_id_, 0, size_in_bytes_, data);
+  }
+  else {
+    /* This binds the buffer to GL_ARRAY_BUFFER and upload the data if any. */
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo_id_);
+    glGetBufferSubData(GL_SHADER_STORAGE_BUFFER, 0, size_in_bytes_, data);
+    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
+  }
+}
+
 /** \} */
 
 }  // namespace blender::gpu
diff --git a/source/blender/gpu/opengl/gl_storage_buffer.hh b/source/blender/gpu/opengl/gl_storage_buffer.hh
index ffe2de12451..680ce911bc7 100644
--- a/source/blender/gpu/opengl/gl_storage_buffer.hh
+++ b/source/blender/gpu/opengl/gl_storage_buffer.hh
@@ -35,6 +35,7 @@ class GLStorageBuf : public StorageBuf {
   void unbind() override;
   void clear(eGPUTextureFormat internal_format, eGPUDataFormat data_format, void *data) override;
   void copy_sub(VertBuf *src, uint dst_offset, uint src_offset, uint copy_size) override;
+  void read(void *data) override;
 
   /* Special internal function to bind SSBOs to indirect argument targets. */
   void bind_as(GLenum target);
diff --git a/source/blender/gpu/shaders/material/gpu_shader_material_mix_color.glsl b/source/blender/gpu/shaders/material/gpu_shader_material_mix_color.glsl
new file mode 100644
index 00000000000..933a8de9cb7
--- /dev/null
+++ b/source/blender/gpu/shaders/material/gpu_shader_material_mix_color.glsl
@@ -0,0 +1,537 @@
+#pragma BLENDER_REQUIRE(gpu_shader_common_color_utils.glsl)
+
+void node_mix_blend(float fac,
+                    vec3 facvec,
+                    float f1,
+                    float f2,
+                    vec3 v1,
+                    vec3 v2,
+                    vec4 col1,
+                    vec4 col2,
+                    out float outfloat,
+                    out vec3 outvec,
+                    out vec4 outcol)
+{
+  outcol = mix(col1, col2, fac);
+  outcol.a = col1.a;
+}
+
+void node_mix_add(float fac,
+                  vec3 facvec,
+                  float f1,
+                  float f2,
+                  vec3 v1,
+                  vec3 v2,
+                  vec4 col1,
+                  vec4 col2,
+                  out float outfloat,
+                  out vec3 outvec,
+                  out vec4 outcol)
+{
+
+  outcol = mix(col1, col1 + col2, fac);
+  outcol.a = col1.a;
+}
+
+void node_mix_mult(float fac,
+                   vec3 facvec,
+                   float f1,
+                   float f2,
+                   vec3 v1,
+                   vec3 v2,
+                   vec4 col1,
+                   vec4 col2,
+                   out float outfloat,
+                   out vec3 outvec,
+                   out vec4 outcol)
+{
+
+  outcol = mix(col1, col1 * col2, fac);
+  outcol.a = col1.a;
+}
+
+void node_mix_screen(float fac,
+                     vec3 facvec,
+                     float f1,
+                     float f2,
+                     vec3 v1,
+                     vec3 v2,
+                     vec4 col1,
+                     vec4 col2,
+                     out float outfloat,
+                     out vec3 outvec,
+                     out vec4 outcol)
+{
+
+  float facm = 1.0 - fac;
+
+  outcol = vec4(1.0) - (vec4(facm) + fac * (vec4(1.0) - col2)) * (vec4(1.0) - col1);
+  outcol.a = col1.a;
+}
+
+void node_mix_overlay(float fac,
+                      vec3 facvec,
+                      float f1,
+                      float f2,
+                      vec3 v1,
+                      vec3 v2,
+                      vec4 col1,
+                      vec4 col2,
+                      out float outfloat,
+                      out vec3 outvec,
+                      out vec4 outcol)
+{
+
+  float facm = 1.0 - fac;
+
+  outcol = col1;
+
+  if (outcol.r < 0.5) {
+    outcol.r *= facm + 2.0 * fac * col2.r;
+  }
+  else {
+    outcol.r = 1.0 - (facm + 2.0 * fac * (1.0 - col2.r)) * (1.0 - outcol.r);
+  }
+
+  if (outcol.g < 0.5) {
+    outcol.g *= facm + 2.0 * fac * col2.g;
+  }
+  else {
+    outcol.g = 1.0 - (facm + 2.0 * fac * (1.0 - col2.g)) * (1.0 - outcol.g);
+  }
+
+  if (outcol.b < 0.5) {
+    outcol.b *= facm + 2.0 * fac * col2.b;
+  }
+  else {
+    outcol.b = 1.0 - (facm + 2.0 * fac * (1.0 - col2.b)) * (1.0 - outcol.b);
+  }
+}
+
+void node_mix_sub(float fac,
+                  vec3 facvec,
+                  float f1,
+                  float f2,
+                  vec3 v1,
+                  vec3 v2,
+                  vec4 col1,
+                  vec4 col2,
+                  out float outfloat,
+                  out vec3 outvec,
+                  out vec4 outcol)
+{
+
+  outcol = mix(col1, col1 - col2, fac);
+  outcol.a = col1.a;
+}
+
+/* A variant of mix_div that fallback to the first color upon zero division. */
+void node_mix_div_fallback(float fac,
+                           vec3 facvec,
+                           float f1,
+                           float f2,
+                           vec3 v1,
+                           vec3 v2,
+                           vec4 col1,
+                           vec4 col2,
+                           out float outfloat,
+                           out vec3 outvec,
+                           out vec4 outcol)
+{
+
+  float facm = 1.0 - fac;
+
+  outcol = col1;
+
+  if (col2.r != 0.0) {
+    outcol.r = facm * outcol.r + fac * outcol.r / col2.r;
+  }
+  if (col2.g != 0.0) {
+    outcol.g = facm * outcol.g + fac * outcol.g / col2.g;
+  }
+  if (col2.b != 0.0) {
+    outcol.b = facm * outcol.b + fac * outcol.b / col2.b;
+  }
+}
+
+void node_mix_diff(float fac,
+                   vec3 facvec,
+                   float f1,
+                   float f2,
+                   vec3 v1,
+                   vec3 v2,
+                   vec4 col1,
+                   vec4 col2,
+                   out float outfloat,
+                   out vec3 outvec,
+                   out vec4 outcol)
+{
+
+  outcol = mix(col1, abs(col1 - col2), fac);
+  outcol.a = col1.a;
+}
+
+void node_mix_dark(float fac,
+                   vec3 facvec,
+                   float f1,
+                   float f2,
+                   vec3 v1,
+                   vec3 v2,
+                   vec4 col1,
+                   vec4 col2,
+                   out float outfloat,
+                   out vec3 outvec,
+                   out vec4 outcol)
+{
+
+  outcol.rgb = mix(col1.rgb, min(col1.rgb, col2.rgb), fac);
+  outcol.a = col1.a;
+}
+
+void node_mix_light(float fac,
+                    vec3 facvec,
+                    float f1,
+                    float f2,
+                    vec3 v1,
+                    vec3 v2,
+                    vec4 col1,
+                    vec4 col2,
+                    out float outfloat,
+                    out vec3 outvec,
+                    out vec4 outcol)
+{
+  outcol.rgb = mix(col1.rgb, max(col1.rgb, col2.rgb), fac);
+  outcol.a = col1.a;
+}
+
+void node_mix_dodge(float fac,
+                    vec3 facvec,
+                    float f1,
+                    float f2,
+                    vec3 v1,
+                    vec3 v2,
+                    vec4 col1,
+                    vec4 col2,
+                    out float outfloat,
+                    out vec3 outvec,
+                    out vec4 outcol)
+{
+  outcol = col1;
+
+  if (outcol.r != 0.0) {
+    float tmp = 1.0 - fac * col2.r;
+    if (tmp <= 0.0) {
+      outcol.r = 1.0;
+    }
+    else if ((tmp = outcol.r / tmp) > 1.0) {
+      outcol.r = 1.0;
+    }
+    else {
+      outcol.r = tmp;
+    }
+  }
+  if (outcol.g != 0.0) {
+    float tmp = 1.0 - fac * col2.g;
+    if (tmp <= 0.0) {
+      outcol.g = 1.0;
+    }
+    else if ((tmp = outcol.g / tmp) > 1.0) {
+      outcol.g = 1.0;
+    }
+    else {
+      outcol.g = tmp;
+    }
+  }
+  if (outcol.b != 0.0) {
+    float tmp = 1.0 - fac * col2.b;
+    if (tmp <= 0.0) {
+      outcol.b = 1.0;
+    }
+    else if ((tmp = outcol.b / tmp) > 1.0) {
+      outcol.b = 1.0;
+    }
+    else {
+      outcol.b = tmp;
+    }
+  }
+}
+
+void node_mix_burn(float fac,
+                   vec3 facvec,
+                   float f1,
+                   float f2,
+                   vec3 v1,
+                   vec3 v2,
+                   vec4 col1,
+                   vec4 col2,
+                   out float outfloat,
+                   out vec3 outvec,
+                   out vec4 outcol)
+{
+
+  float tmp, facm = 1.0 - fac;
+
+  outcol = col1;
+
+  tmp = facm + fac * col2.r;
+  if (tmp <= 0.0) {
+    outcol.r = 0.0;
+  }
+  else if ((tmp = (1.0 - (1.0 - outcol.r) / tmp)) < 0.0) {
+    outcol.r = 0.0;
+  }
+  else if (tmp > 1.0) {
+    outcol.r = 1.0;
+  }
+  else {
+    outcol.r = tmp;
+  }
+
+  tmp = facm + fac * col2.g;
+  if (tmp <= 0.0) {
+    outcol.g = 0.0;
+  }
+  else if ((tmp = (1.0 - (1.0 - outcol.g) / tmp)) < 0.0) {
+    outcol.g = 0.0;
+  }
+  else if (tmp > 1.0) {
+    outcol.g = 1.0;
+  }
+  else {
+    outcol.g = tmp;
+  }
+
+  tmp = facm + fac * col2.b;
+  if (tmp <= 0.0) {
+    outcol.b = 0.0;
+  }
+  else if ((tmp = (1.0 - (1.0 - outcol.b) / tmp)) < 0.0) {
+    outcol.b = 0.0;
+  }
+  else if (tmp > 1.0) {
+    outcol.b = 1.0;
+  }
+  else {
+    outcol.b = tmp;
+  }
+}
+
+void node_mix_hue(float fac,
+                  vec3 facvec,
+                  float f1,
+                  float f2,
+                  vec3 v1,
+                  vec3 v2,
+                  vec4 col1,
+                  vec4 col2,
+                  out float outfloat,
+                  out vec3 outvec,
+                  out vec4 outcol)
+{
+
+  float facm = 1.0 - fac;
+
+  outcol = col1;
+
+  vec4 hsv, hsv2, tmp;
+  rgb_to_hsv(col2, hsv2);
+
+  if (hsv2.y != 0.0) {
+    rgb_to_hsv(outcol, hsv);
+    hsv.x = hsv2.x;
+    hsv_to_rgb(hsv, tmp);
+
+    outcol = mix(outcol, tmp, fac);
+    outcol.a = col1.a;
+  }
+}
+
+void node_mix_sat(float fac,
+                  vec3 facvec,
+                  float f1,
+                  float f2,
+                  vec3 v1,
+                  vec3 v2,
+                  vec4 col1,
+                  vec4 col2,
+                  out float outfloat,
+                  out vec3 outvec,
+                  out vec4 outcol)
+{
+
+  float facm = 1.0 - fac;
+
+  outcol = col1;
+
+  vec4 hsv, hsv2;
+  rgb_to_hsv(outcol, hsv);
+
+  if (hsv.y != 0.0) {
+    rgb_to_hsv(col2, hsv2);
+
+    hsv.y = facm * hsv.y + fac * hsv2.y;
+    hsv_to_rgb(hsv, outcol);
+  }
+}
+
+void node_mix_val(float fac,
+                  vec3 facvec,
+                  float f1,
+                  float f2,
+                  vec3 v1,
+                  vec3 v2,
+                  vec4 col1,
+                  vec4 col2,
+                  out float outfloat,
+                  out vec3 outvec,
+                  out vec4 outcol)
+{
+
+  float facm = 1.0 - fac;
+
+  vec4 hsv, hsv2;
+  rgb_to_hsv(col1, hsv);
+  rgb_to_hsv(col2, hsv2);
+
+  hsv.z = facm * hsv.z + fac * hsv2.z;
+  hsv_to_rgb(hsv, outcol);
+}
+
+void node_mix_color(float fac,
+                    vec3 facvec,
+                    float f1,
+                    float f2,
+                    vec3 v1,
+                    vec3 v2,
+                    vec4 col1,
+                    vec4 col2,
+                    out float outfloat,
+                    out vec3 outvec,
+                    out vec4 outcol)
+{
+
+  float facm = 1.0 - fac;
+
+  outcol = col1;
+
+  vec4 hsv, hsv2, tmp;
+  rgb_to_hsv(col2, hsv2);
+
+  if (hsv2.y != 0.0) {
+    rgb_to_hsv(outcol, hsv);
+    hsv.x = hsv2.x;
+    hsv.y = hsv2.y;
+    hsv_to_rgb(hsv, tmp);
+
+    outcol = mix(outcol, tmp, fac);
+    outcol.a = col1.a;
+  }
+}
+
+void node_mix_soft(float fac,
+                   vec3 facvec,
+                   float f1,
+                   float f2,
+                   vec3 v1,
+                   vec3 v2,
+                   vec4 col1,
+                   vec4 col2,
+                   out float outfloat,
+                   out vec3 outvec,
+                   out vec4 outcol)
+{
+
+  float facm = 1.0 - fac;
+
+  vec4 one = vec4(1.0);
+  vec4 scr = one - (one - col2) * (one - col1);
+  outcol = facm * col1 + fac * ((one - col1) * col2 * col1 + col1 * scr);
+}
+
+void node_mix_linear(float fac,
+                     vec3 facvec,
+                     float f1,
+                     float f2,
+                     vec3 v1,
+                     vec3 v2,
+                     vec4 col1,
+                     vec4 col2,
+                     out float outfloat,
+                     out vec3 outvec,
+                     out vec4 outcol)
+{
+
+  outcol = col1 + fac * (2.0 * (col2 - vec4(0.5)));
+}
+
+void node_mix_float(float fac,
+                    vec3 facvec,
+                    float f1,
+                    float f2,
+                    vec3 v1,
+                    vec3 v2,
+                    vec4 col1,
+                    vec4 col2,
+                    out float outfloat,
+                    out vec3 outvec,
+                    out vec4 outcol)
+{
+
+  outfloat = mix(f1, f2, fac);
+}
+
+void node_mix_vector(float fac,
+                     vec3 facvec,
+                     float f1,
+                     float f2,
+                     vec3 v1,
+                     vec3 v2,
+                     vec4 col1,
+                     vec4 col2,
+                     out float outfloat,
+                     out vec3 outvec,
+                     out vec4 outcol)
+{
+
+  outvec = mix(v1, v2, fac);
+}
+
+void node_mix_vector_non_uniform(float fac,
+                                 vec3 facvec,
+                                 float f1,
+                                 float f2,
+                                 vec3 v1,
+                                 vec3 v2,
+                                 vec4 col1,
+                                 vec4 col2,
+                                 out float outfloat,
+                                 out vec3 outvec,
+                                 out vec4 outcol)
+{
+  outvec = mix(v1, v2, facvec);
+}
+
+void node_mix_rgba(float fac,
+                   vec3 facvec,
+                   float f1,
+                   float f2,
+                   vec3 v1,
+                   vec3 v2,
+                   vec4 col1,
+                   vec4 col2,
+                   out float outfloat,
+                   out vec3 outvec,
+                   out vec4 outcol)
+{
+  outcol = mix(col1, col2, fac);
+}
+
+void node_mix_clamp_vector(vec3 vec, vec3 min, vec3 max, out vec3 outvec)
+{
+  outvec = clamp(vec, min, max);
+}
+
+void node_mix_clamp_value(float value, float min, float max, out float outfloat)
+{
+  outfloat = clamp(value, min, max);
+}
diff --git a/source/blender/io/alembic/intern/abc_customdata.cc b/source/blender/io/alembic/intern/abc_customdata.cc
index 2820a128072..9c71944fc92 100644
--- a/source/blender/io/alembic/intern/abc_customdata.cc
+++ b/source/blender/io/alembic/intern/abc_customdata.cc
@@ -540,7 +540,7 @@ void read_generated_coordinates(const ICompoundProperty &prop,
     cd_data = CustomData_get_layer(&mesh->vdata, CD_ORCO);
   }
   else {
-    cd_data = CustomData_add_layer(&mesh->vdata, CD_ORCO, CD_CALLOC, nullptr, totvert);
+    cd_data = CustomData_add_layer(&mesh->vdata, CD_ORCO, CD_CONSTRUCT, nullptr, totvert);
   }
 
   float(*orcodata)[3] = static_cast<float(*)[3]>(cd_data);
diff --git a/source/blender/io/alembic/intern/abc_reader_mesh.cc b/source/blender/io/alembic/intern/abc_reader_mesh.cc
index 2253880d5ca..16e5ee968a3 100644
--- a/source/blender/io/alembic/intern/abc_reader_mesh.cc
+++ b/source/blender/io/alembic/intern/abc_reader_mesh.cc
@@ -391,7 +391,7 @@ static void *add_customdata_cb(Mesh *mesh, const char *name, int data_type)
   /* Create a new layer. */
   int numloops = mesh->totloop;
   cd_ptr = CustomData_add_layer_named(
-      &mesh->ldata, cd_data_type, CD_DEFAULT, nullptr, numloops, name);
+      &mesh->ldata, cd_data_type, CD_SET_DEFAULT, nullptr, numloops, name);
   return cd_ptr;
 }
 
@@ -896,7 +896,7 @@ static void read_vertex_creases(Mesh *mesh,
   }
 
   float *vertex_crease_data = (float *)CustomData_add_layer(
-      &mesh->vdata, CD_CREASE, CD_DEFAULT, nullptr, mesh->totvert);
+      &mesh->vdata, CD_CREASE, CD_SET_DEFAULT, nullptr, mesh->totvert);
   const int totvert = mesh->totvert;
 
   for (int i = 0, v = indices->size(); i < v; ++i) {
diff --git a/source/blender/io/collada/MeshImporter.cpp b/source/blender/io/collada/MeshImporter.cpp
index b40546dfd97..fab53908d5a 100644
--- a/source/blender/io/collada/MeshImporter.cpp
+++ b/source/blender/io/collada/MeshImporter.cpp
@@ -341,7 +341,8 @@ void MeshImporter::read_vertices(COLLADAFW::Mesh *mesh, Mesh *me)
   }
 
   me->totvert = pos.getFloatValues()->getCount() / stride;
-  me->mvert = (MVert *)CustomData_add_layer(&me->vdata, CD_MVERT, CD_CALLOC, nullptr, me->totvert);
+  me->mvert = (MVert *)CustomData_add_layer(
+      &me->vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, me->totvert);
 
   MVert *mvert;
   int i;
@@ -449,9 +450,9 @@ void MeshImporter::allocate_poly_data(COLLADAFW::Mesh *collada_mesh, Mesh *me)
     me->totpoly = total_poly_count;
     me->totloop = total_loop_count;
     me->mpoly = (MPoly *)CustomData_add_layer(
-        &me->pdata, CD_MPOLY, CD_CALLOC, nullptr, me->totpoly);
+        &me->pdata, CD_MPOLY, CD_SET_DEFAULT, nullptr, me->totpoly);
     me->mloop = (MLoop *)CustomData_add_layer(
-        &me->ldata, CD_MLOOP, CD_CALLOC, nullptr, me->totloop);
+        &me->ldata, CD_MLOOP, CD_SET_DEFAULT, nullptr, me->totloop);
 
     unsigned int totuvset = collada_mesh->getUVCoords().getInputInfosArray().getCount();
     for (int i = 0; i < totuvset; i++) {
@@ -468,7 +469,7 @@ void MeshImporter::allocate_poly_data(COLLADAFW::Mesh *collada_mesh, Mesh *me)
         COLLADAFW::String &uvname = info->mName;
         /* Allocate space for UV_data */
         CustomData_add_layer_named(
-            &me->ldata, CD_MLOOPUV, CD_DEFAULT, nullptr, me->totloop, uvname.c_str());
+            &me->ldata, CD_MLOOPUV, CD_SET_DEFAULT, nullptr, me->totloop, uvname.c_str());
       }
       /* activate the first uv map */
       me->mloopuv = (MLoopUV *)CustomData_get_layer_n(&me->ldata, CD_MLOOPUV, 0);
@@ -481,7 +482,7 @@ void MeshImporter::allocate_poly_data(COLLADAFW::Mesh *collada_mesh, Mesh *me)
             collada_mesh->getColors().getInputInfosArray()[i];
         COLLADAFW::String colname = extract_vcolname(info->mName);
         CustomData_add_layer_named(
-            &me->ldata, CD_PROP_BYTE_COLOR, CD_DEFAULT, nullptr, me->totloop, colname.c_str());
+            &me->ldata, CD_PROP_BYTE_COLOR, CD_SET_DEFAULT, nullptr, me->totloop, colname.c_str());
       }
       me->mloopcol = (MLoopCol *)CustomData_get_layer_n(&me->ldata, CD_PROP_BYTE_COLOR, 0);
     }
@@ -546,11 +547,11 @@ void MeshImporter::mesh_add_edges(Mesh *mesh, int len)
   totedge = mesh->totedge + len;
 
   /* Update custom-data. */
-  CustomData_copy(&mesh->edata, &edata, CD_MASK_MESH.emask, CD_DEFAULT, totedge);
+  CustomData_copy(&mesh->edata, &edata, CD_MASK_MESH.emask, CD_SET_DEFAULT, totedge);
   CustomData_copy_data(&mesh->edata, &edata, 0, 0, mesh->totedge);
 
   if (!CustomData_has_layer(&edata, CD_MEDGE)) {
-    CustomData_add_layer(&edata, CD_MEDGE, CD_CALLOC, nullptr, totedge);
+    CustomData_add_layer(&edata, CD_MEDGE, CD_SET_DEFAULT, nullptr, totedge);
   }
 
   CustomData_free(&mesh->edata, mesh->totedge);
@@ -615,7 +616,7 @@ void MeshImporter::read_polys(COLLADAFW::Mesh *collada_mesh, Mesh *me)
   MaterialIdPrimitiveArrayMap mat_prim_map;
 
   int *material_indices = (int *)CustomData_add_layer_named(
-      &me->pdata, CD_PROP_INT32, CD_DEFAULT, nullptr, me->totpoly, "material_index");
+      &me->pdata, CD_PROP_INT32, CD_SET_DEFAULT, nullptr, me->totpoly, "material_index");
 
   COLLADAFW::MeshPrimitiveArray &prim_arr = collada_mesh->getMeshPrimitives();
   COLLADAFW::MeshVertexData &nor = collada_mesh->getNormals();
diff --git a/source/blender/io/stl/importer/stl_import_mesh.cc b/source/blender/io/stl/importer/stl_import_mesh.cc
index b9ed441f0d9..178b5b9347f 100644
--- a/source/blender/io/stl/importer/stl_import_mesh.cc
+++ b/source/blender/io/stl/importer/stl_import_mesh.cc
@@ -77,7 +77,7 @@ Mesh *STLMeshHelper::to_mesh(Main *bmain, char *mesh_name)
 
   mesh->totvert = verts_.size();
   mesh->mvert = static_cast<MVert *>(
-      CustomData_add_layer(&mesh->vdata, CD_MVERT, CD_CALLOC, nullptr, mesh->totvert));
+      CustomData_add_layer(&mesh->vdata, CD_MVERT, CD_SET_DEFAULT, nullptr, mesh->totvert));
   for (int i = 0; i < mesh->totvert; i++) {
     copy_v3_v3(mesh->mvert[i].co, verts_[i]);
   }
@@ -85,9 +85,9 @@ Mesh *STLMeshHelper::to_mesh(Main *bmain, char *mesh_name)
   mesh->totpoly = tris_.size();
   mesh->totloop = tris_.size() * 3;
   mesh->mpoly = static_cast<MPoly *>(
-      CustomData_add_layer(&mesh->pdata, CD_MPOLY, CD_CALLOC, nullptr, mesh->totpoly));
+      CustomData_add_layer(&mesh->pdata, CD_MPOLY, CD_SET_DEFAULT, nullptr, mesh->totpoly));
   mesh->mloop = static_cast<MLoop *>(
-      CustomData_add_layer(&mesh->ldata, CD_MLOOP, CD_CALLOC, nullptr, mesh->totloop));
+      CustomData_add_layer(&mesh->ldata, CD_MLOOP, CD_CONSTRUCT, nullptr, mesh->totloop));
 
   threading::parallel_for(tris_.index_range(), 2048, [&](IndexRange tris_range) {
     for (const int i : tris_range) {
diff --git a/source/blender/io/usd/intern/usd_reader_mesh.cc b/source/blender/io/usd/intern/usd_reader_mesh.cc
index 73a65bafc85..89a98097780 100644
--- a/source/blender/io/usd/intern/usd_reader_mesh.cc
+++ b/source/blender/io/usd/intern/usd_reader_mesh.cc
@@ -208,7 +208,8 @@ static void *add_customdata_cb(Mesh *mesh, const char *name, const int data_type
 
   /* Create a new layer. */
   numloops = mesh->totloop;
-  cd_ptr = CustomData_add_layer_named(loopdata, cd_data_type, CD_DEFAULT, nullptr, numloops, name);
+  cd_ptr = CustomData_add_layer_named(
+      loopdata, cd_data_type, CD_SET_DEFAULT, nullptr, numloops, name);
   return cd_ptr;
 }
 
@@ -576,7 +577,7 @@ void USDMeshReader::read_vertex_creases(Mesh *mesh, const double motionSampleTim
   }
 
   float *creases = static_cast<float *>(
-      CustomData_add_layer(&mesh->vdata, CD_CREASE, CD_DEFAULT, nullptr, mesh->totvert));
+      CustomData_add_layer(&mesh->vdata, CD_CREASE, CD_SET_DEFAULT, nullptr, mesh->totvert));
 
   for (size_t i = 0; i < corner_indices.size(); i++) {
     creases[corner_indices[i]] = corner_sharpnesses[i];
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc
index 4c3d52131b7..902f801ee5b 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.cc
@@ -44,7 +44,7 @@ static const char *DEFORM_GROUP_DISABLED = "off";
  * So an empty material name is written. */
 static const char *MATERIAL_GROUP_DISABLED = "";
 
-void OBJWriter::write_vert_uv_normal_indices(FormatHandler<eFileType::OBJ> &fh,
+void OBJWriter::write_vert_uv_normal_indices(FormatHandler &fh,
                                              const IndexOffsets &offsets,
                                              Span<int> vert_indices,
                                              Span<int> uv_indices,
@@ -57,12 +57,12 @@ void OBJWriter::write_vert_uv_normal_indices(FormatHandler<eFileType::OBJ> &fh,
   const int uv_offset = offsets.uv_vertex_offset + 1;
   const int normal_offset = offsets.normal_offset + 1;
   const int n = vert_indices.size();
-  fh.write<eOBJSyntaxElement::poly_element_begin>();
+  fh.write_obj_poly_begin();
   if (!flip) {
     for (int j = 0; j < n; ++j) {
-      fh.write<eOBJSyntaxElement::vertex_uv_normal_indices>(vert_indices[j] + vertex_offset,
-                                                            uv_indices[j] + uv_offset,
-                                                            normal_indices[j] + normal_offset);
+      fh.write_obj_poly_v_uv_normal(vert_indices[j] + vertex_offset,
+                                    uv_indices[j] + uv_offset,
+                                    normal_indices[j] + normal_offset);
     }
   }
   else {
@@ -71,15 +71,15 @@ void OBJWriter::write_vert_uv_normal_indices(FormatHandler<eFileType::OBJ> &fh,
      * then go backwards. Same logic in other write_*_indices functions below. */
     for (int k = 0; k < n; ++k) {
       int j = k == 0 ? 0 : n - k;
-      fh.write<eOBJSyntaxElement::vertex_uv_normal_indices>(vert_indices[j] + vertex_offset,
-                                                            uv_indices[j] + uv_offset,
-                                                            normal_indices[j] + normal_offset);
+      fh.write_obj_poly_v_uv_normal(vert_indices[j] + vertex_offset,
+                                    uv_indices[j] + uv_offset,
+                                    normal_indices[j] + normal_offset);
     }
   }
-  fh.write<eOBJSyntaxElement::poly_element_end>();
+  fh.write_obj_poly_end();
 }
 
-void OBJWriter::write_vert_normal_indices(FormatHandler<eFileType::OBJ> &fh,
+void OBJWriter::write_vert_normal_indices(FormatHandler &fh,
                                           const IndexOffsets &offsets,
                                           Span<int> vert_indices,
                                           Span<int> /*uv_indices*/,
@@ -90,24 +90,24 @@ void OBJWriter::write_vert_normal_indices(FormatHandler<eFileType::OBJ> &fh,
   const int vertex_offset = offsets.vertex_offset + 1;
   const int normal_offset = offsets.normal_offset + 1;
   const int n = vert_indices.size();
-  fh.write<eOBJSyntaxElement::poly_element_begin>();
+  fh.write_obj_poly_begin();
   if (!flip) {
     for (int j = 0; j < n; ++j) {
-      fh.write<eOBJSyntaxElement::vertex_normal_indices>(vert_indices[j] + vertex_offset,
-                                                         normal_indices[j] + normal_offset);
+      fh.write_obj_poly_v_normal(vert_indices[j] + vertex_offset,
+                                 normal_indices[j] + normal_offset);
     }
   }
   else {
     for (int k = 0; k < n; ++k) {
       int j = k == 0 ? 0 : n - k;
-      fh.write<eOBJSyntaxElement::vertex_normal_indices>(vert_indices[j] + vertex_offset,
-                                                         normal_indices[j] + normal_offset);
+      fh.write_obj_poly_v_normal(vert_indices[j] + vertex_offset,
+                                 normal_indices[j] + normal_offset);
     }
   }
-  fh.write<eOBJSyntaxElement::poly_element_end>();
+  fh.write_obj_poly_end();
 }
 
-void OBJWriter::write_vert_uv_indices(FormatHandler<eFileType::OBJ> &fh,
+void OBJWriter::write_vert_uv_indices(FormatHandler &fh,
                                       const IndexOffsets &offsets,
                                       Span<int> vert_indices,
                                       Span<int> uv_indices,
@@ -118,24 +118,22 @@ void OBJWriter::write_vert_uv_indices(FormatHandler<eFileType::OBJ> &fh,
   const int vertex_offset = offsets.vertex_offset + 1;
   const int uv_offset = offsets.uv_vertex_offset + 1;
   const int n = vert_indices.size();
-  fh.write<eOBJSyntaxElement::poly_element_begin>();
+  fh.write_obj_poly_begin();
   if (!flip) {
     for (int j = 0; j < n; ++j) {
-      fh.write<eOBJSyntaxElement::vertex_uv_indices>(vert_indices[j] + vertex_offset,
-                                                     uv_indices[j] + uv_offset);
+      fh.write_obj_poly_v_uv(vert_indices[j] + vertex_offset, uv_indices[j] + uv_offset);
     }
   }
   else {
     for (int k = 0; k < n; ++k) {
       int j = k == 0 ? 0 : n - k;
-      fh.write<eOBJSyntaxElement::vertex_uv_indices>(vert_indices[j] + vertex_offset,
-                                                     uv_indices[j] + uv_offset);
+      fh.write_obj_poly_v_uv(vert_indices[j] + vertex_offset, uv_indices[j] + uv_offset);
     }
   }
-  fh.write<eOBJSyntaxElement::poly_element_end>();
+  fh.write_obj_poly_end();
 }
 
-void OBJWriter::write_vert_indices(FormatHandler<eFileType::OBJ> &fh,
+void OBJWriter::write_vert_indices(FormatHandler &fh,
                                    const IndexOffsets &offsets,
                                    Span<int> vert_indices,
                                    Span<int> /*uv_indices*/,
@@ -144,27 +142,27 @@ void OBJWriter::write_vert_indices(FormatHandler<eFileType::OBJ> &fh,
 {
   const int vertex_offset = offsets.vertex_offset + 1;
   const int n = vert_indices.size();
-  fh.write<eOBJSyntaxElement::poly_element_begin>();
+  fh.write_obj_poly_begin();
   if (!flip) {
     for (int j = 0; j < n; ++j) {
-      fh.write<eOBJSyntaxElement::vertex_indices>(vert_indices[j] + vertex_offset);
+      fh.write_obj_poly_v(vert_indices[j] + vertex_offset);
     }
   }
   else {
     for (int k = 0; k < n; ++k) {
       int j = k == 0 ? 0 : n - k;
-      fh.write<eOBJSyntaxElement::vertex_indices>(vert_indices[j] + vertex_offset);
+      fh.write_obj_poly_v(vert_indices[j] + vertex_offset);
     }
   }
-  fh.write<eOBJSyntaxElement::poly_element_end>();
+  fh.write_obj_poly_end();
 }
 
 void OBJWriter::write_header() const
 {
   using namespace std::string_literals;
-  FormatHandler<eFileType::OBJ> fh;
-  fh.write<eOBJSyntaxElement::string>("# Blender "s + BKE_blender_version_string() + "\n");
-  fh.write<eOBJSyntaxElement::string>("# www.blender.org\n");
+  FormatHandler fh;
+  fh.write_string("# Blender "s + BKE_blender_version_string());
+  fh.write_string("# www.blender.org");
   fh.write_to_file(outfile_);
 }
 
@@ -174,8 +172,8 @@ void OBJWriter::write_mtllib_name(const StringRefNull mtl_filepath) const
   char mtl_file_name[FILE_MAXFILE];
   char mtl_dir_name[FILE_MAXDIR];
   BLI_split_dirfile(mtl_filepath.data(), mtl_dir_name, mtl_file_name, FILE_MAXDIR, FILE_MAXFILE);
-  FormatHandler<eFileType::OBJ> fh;
-  fh.write<eOBJSyntaxElement::mtllib>(mtl_file_name);
+  FormatHandler fh;
+  fh.write_obj_mtllib(mtl_file_name);
   fh.write_to_file(outfile_);
 }
 
@@ -184,18 +182,17 @@ static void spaces_to_underscores(std::string &r_name)
   std::replace(r_name.begin(), r_name.end(), ' ', '_');
 }
 
-void OBJWriter::write_object_name(FormatHandler<eFileType::OBJ> &fh,
-                                  const OBJMesh &obj_mesh_data) const
+void OBJWriter::write_object_name(FormatHandler &fh, const OBJMesh &obj_mesh_data) const
 {
   std::string object_name = obj_mesh_data.get_object_name();
   spaces_to_underscores(object_name);
   if (export_params_.export_object_groups) {
     std::string mesh_name = obj_mesh_data.get_object_mesh_name();
     spaces_to_underscores(mesh_name);
-    fh.write<eOBJSyntaxElement::object_group>(object_name + "_" + mesh_name);
+    fh.write_obj_group(object_name + "_" + mesh_name);
     return;
   }
-  fh.write<eOBJSyntaxElement::object_name>(object_name);
+  fh.write_obj_object(object_name);
 }
 
 /* Split up large meshes into multi-threaded jobs; each job processes
@@ -213,9 +210,7 @@ static int calc_chunk_count(int count)
  * will be written into the final /fh/ buffer at the end.
  */
 template<typename Function>
-void obj_parallel_chunked_output(FormatHandler<eFileType::OBJ> &fh,
-                                 int tot_count,
-                                 const Function &function)
+void obj_parallel_chunked_output(FormatHandler &fh, int tot_count, const Function &function)
 {
   if (tot_count <= 0) {
     return;
@@ -231,7 +226,7 @@ void obj_parallel_chunked_output(FormatHandler<eFileType::OBJ> &fh,
     return;
   }
   /* Give each chunk its own temporary output buffer, and process them in parallel. */
-  std::vector<FormatHandler<eFileType::OBJ>> buffers(chunk_count);
+  std::vector<FormatHandler> buffers(chunk_count);
   blender::threading::parallel_for(IndexRange(chunk_count), 1, [&](IndexRange range) {
     for (const int r : range) {
       int i_start = r * chunk_size;
@@ -248,7 +243,7 @@ void obj_parallel_chunked_output(FormatHandler<eFileType::OBJ> &fh,
   }
 }
 
-void OBJWriter::write_vertex_coords(FormatHandler<eFileType::OBJ> &fh,
+void OBJWriter::write_vertex_coords(FormatHandler &fh,
                                     const OBJMesh &obj_mesh_data,
                                     bool write_colors) const
 {
@@ -265,41 +260,40 @@ void OBJWriter::write_vertex_coords(FormatHandler<eFileType::OBJ> &fh,
         colors_layer->name, ATTR_DOMAIN_POINT, {0.0f, 0.0f, 0.0f, 0.0f});
 
     BLI_assert(tot_count == attribute.size());
-    obj_parallel_chunked_output(fh, tot_count, [&](FormatHandler<eFileType::OBJ> &buf, int i) {
+    obj_parallel_chunked_output(fh, tot_count, [&](FormatHandler &buf, int i) {
       float3 vertex = obj_mesh_data.calc_vertex_coords(i, export_params_.scaling_factor);
       ColorGeometry4f linear = attribute.get(i);
       float srgb[3];
       linearrgb_to_srgb_v3_v3(srgb, linear);
-      buf.write<eOBJSyntaxElement::vertex_coords_color>(
-          vertex[0], vertex[1], vertex[2], srgb[0], srgb[1], srgb[2]);
+      buf.write_obj_vertex_color(vertex[0], vertex[1], vertex[2], srgb[0], srgb[1], srgb[2]);
     });
   }
   else {
-    obj_parallel_chunked_output(fh, tot_count, [&](FormatHandler<eFileType::OBJ> &buf, int i) {
+    obj_parallel_chunked_output(fh, tot_count, [&](FormatHandler &buf, int i) {
       float3 vertex = obj_mesh_data.calc_vertex_coords(i, export_params_.scaling_factor);
-      buf.write<eOBJSyntaxElement::vertex_coords>(vertex[0], vertex[1], vertex[2]);
+      buf.write_obj_vertex(vertex[0], vertex[1], vertex[2]);
     });
   }
 }
 
-void OBJWriter::write_uv_coords(FormatHandler<eFileType::OBJ> &fh, OBJMesh &r_obj_mesh_data) const
+void OBJWriter::write_uv_coords(FormatHandler &fh, OBJMesh &r_obj_mesh_data) const
 {
   const Vector<float2> &uv_coords = r_obj_mesh_data.get_uv_coords();
   const int tot_count = uv_coords.size();
-  obj_parallel_chunked_output(fh, tot_count, [&](FormatHandler<eFileType::OBJ> &buf, int i) {
+  obj_parallel_chunked_output(fh, tot_count, [&](FormatHandler &buf, int i) {
     const float2 &uv_vertex = uv_coords[i];
-    buf.write<eOBJSyntaxElement::uv_vertex_coords>(uv_vertex[0], uv_vertex[1]);
+    buf.write_obj_uv(uv_vertex[0], uv_vertex[1]);
   });
 }
 
-void OBJWriter::write_poly_normals(FormatHandler<eFileType::OBJ> &fh, OBJMesh &obj_mesh_data)
+void OBJWriter::write_poly_normals(FormatHandler &fh, OBJMesh &obj_mesh_data)
 {
   /* Poly normals should be calculated earlier via store_normal_coords_and_indices. */
   const Vector<float3> &normal_coords = obj_mesh_data.get_normal_coords();
   const int tot_count = normal_coords.size();
-  obj_parallel_chunked_output(fh, tot_count, [&](FormatHandler<eFileType::OBJ> &buf, int i) {
+  obj_parallel_chunked_output(fh, tot_count, [&](FormatHandler &buf, int i) {
     const float3 &normal = normal_coords[i];
-    buf.write<eOBJSyntaxElement::normal>(normal[0], normal[1], normal[2]);
+    buf.write_obj_normal(normal[0], normal[1], normal[2]);
   });
 }
 
@@ -334,7 +328,7 @@ static int get_smooth_group(const OBJMesh &mesh, const OBJExportParams &params,
   return group;
 }
 
-void OBJWriter::write_poly_elements(FormatHandler<eFileType::OBJ> &fh,
+void OBJWriter::write_poly_elements(FormatHandler &fh,
                                     const IndexOffsets &offsets,
                                     const OBJMesh &obj_mesh_data,
                                     std::function<const char *(int)> matname_fn)
@@ -346,7 +340,7 @@ void OBJWriter::write_poly_elements(FormatHandler<eFileType::OBJ> &fh,
   const int tot_deform_groups = obj_mesh_data.tot_deform_groups();
   threading::EnumerableThreadSpecific<Vector<float>> group_weights;
 
-  obj_parallel_chunked_output(fh, tot_polygons, [&](FormatHandler<eFileType::OBJ> &buf, int idx) {
+  obj_parallel_chunked_output(fh, tot_polygons, [&](FormatHandler &buf, int idx) {
     /* Polygon order for writing into the file is not necessarily the same
      * as order in the mesh; it will be sorted by material indices. Remap current
      * and previous indices here according to the order. */
@@ -362,7 +356,7 @@ void OBJWriter::write_poly_elements(FormatHandler<eFileType::OBJ> &fh,
       const int prev_group = get_smooth_group(obj_mesh_data, export_params_, prev_i);
       const int group = get_smooth_group(obj_mesh_data, export_params_, i);
       if (group != prev_group) {
-        buf.write<eOBJSyntaxElement::smooth_group>(group);
+        buf.write_obj_smooth(group);
       }
     }
 
@@ -375,9 +369,8 @@ void OBJWriter::write_poly_elements(FormatHandler<eFileType::OBJ> &fh,
                                                 prev_i, local_weights);
       const int16_t group = obj_mesh_data.get_poly_deform_group_index(i, local_weights);
       if (group != prev_group) {
-        buf.write<eOBJSyntaxElement::object_group>(
-            group == NOT_FOUND ? DEFORM_GROUP_DISABLED :
-                                 obj_mesh_data.get_poly_deform_group_name(group));
+        buf.write_obj_group(group == NOT_FOUND ? DEFORM_GROUP_DISABLED :
+                                                 obj_mesh_data.get_poly_deform_group_name(group));
       }
     }
 
@@ -391,7 +384,7 @@ void OBJWriter::write_poly_elements(FormatHandler<eFileType::OBJ> &fh,
       const int16_t mat = std::max(0, material_indices[i]);
       if (mat != prev_mat) {
         if (mat == NOT_FOUND) {
-          buf.write<eOBJSyntaxElement::poly_usemtl>(MATERIAL_GROUP_DISABLED);
+          buf.write_obj_usemtl(MATERIAL_GROUP_DISABLED);
         }
         else {
           const char *mat_name = matname_fn(mat);
@@ -401,9 +394,9 @@ void OBJWriter::write_poly_elements(FormatHandler<eFileType::OBJ> &fh,
           if (export_params_.export_material_groups) {
             std::string object_name = obj_mesh_data.get_object_name();
             spaces_to_underscores(object_name);
-            fh.write<eOBJSyntaxElement::object_group>(object_name + "_" + mat_name);
+            fh.write_obj_group(object_name + "_" + mat_name);
           }
-          buf.write<eOBJSyntaxElement::poly_usemtl>(mat_name);
+          buf.write_obj_usemtl(mat_name);
         }
       }
     }
@@ -418,7 +411,7 @@ void OBJWriter::write_poly_elements(FormatHandler<eFileType::OBJ> &fh,
   });
 }
 
-void OBJWriter::write_edges_indices(FormatHandler<eFileType::OBJ> &fh,
+void OBJWriter::write_edges_indices(FormatHandler &fh,
                                     const IndexOffsets &offsets,
                                     const OBJMesh &obj_mesh_data) const
 {
@@ -430,13 +423,12 @@ void OBJWriter::write_edges_indices(FormatHandler<eFileType::OBJ> &fh,
     if (!vertex_indices) {
       continue;
     }
-    fh.write<eOBJSyntaxElement::edge>((*vertex_indices)[0] + offsets.vertex_offset + 1,
-                                      (*vertex_indices)[1] + offsets.vertex_offset + 1);
+    fh.write_obj_edge((*vertex_indices)[0] + offsets.vertex_offset + 1,
+                      (*vertex_indices)[1] + offsets.vertex_offset + 1);
   }
 }
 
-void OBJWriter::write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh,
-                                  const OBJCurve &obj_nurbs_data) const
+void OBJWriter::write_nurbs_curve(FormatHandler &fh, const OBJCurve &obj_nurbs_data) const
 {
   const int total_splines = obj_nurbs_data.total_splines();
   for (int spline_idx = 0; spline_idx < total_splines; spline_idx++) {
@@ -444,15 +436,14 @@ void OBJWriter::write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh,
     for (int vertex_idx = 0; vertex_idx < total_vertices; vertex_idx++) {
       const float3 vertex_coords = obj_nurbs_data.vertex_coordinates(
           spline_idx, vertex_idx, export_params_.scaling_factor);
-      fh.write<eOBJSyntaxElement::vertex_coords>(
-          vertex_coords[0], vertex_coords[1], vertex_coords[2]);
+      fh.write_obj_vertex(vertex_coords[0], vertex_coords[1], vertex_coords[2]);
     }
 
     const char *nurbs_name = obj_nurbs_data.get_curve_name();
     const int nurbs_degree = obj_nurbs_data.get_nurbs_degree(spline_idx);
-    fh.write<eOBJSyntaxElement::object_group>(nurbs_name);
-    fh.write<eOBJSyntaxElement::cstype>();
-    fh.write<eOBJSyntaxElement::nurbs_degree>(nurbs_degree);
+    fh.write_obj_group(nurbs_name);
+    fh.write_obj_cstype();
+    fh.write_obj_nurbs_degree(nurbs_degree);
     /**
      * The numbers written here are indices into the vertex coordinates written
      * earlier, relative to the line that is going to be written.
@@ -461,13 +452,13 @@ void OBJWriter::write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh,
      * 0.0 1.0 -1 -2 -3 -4 -1 -2 -3 for a cyclic curve with 4 vertices.
      */
     const int total_control_points = obj_nurbs_data.total_spline_control_points(spline_idx);
-    fh.write<eOBJSyntaxElement::curve_element_begin>();
+    fh.write_obj_curve_begin();
     for (int i = 0; i < total_control_points; i++) {
       /* "+1" to keep indices one-based, even if they're negative: i.e., -1 refers to the
        * last vertex coordinate, -2 second last. */
-      fh.write<eOBJSyntaxElement::vertex_indices>(-((i % total_vertices) + 1));
+      fh.write_obj_poly_v(-((i % total_vertices) + 1));
     }
-    fh.write<eOBJSyntaxElement::curve_element_end>();
+    fh.write_obj_curve_end();
 
     /**
      * In `parm u 0 0.1 ..` line:, (total control points + 2) equidistant numbers in the
@@ -478,7 +469,7 @@ void OBJWriter::write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh,
     const short flagsu = obj_nurbs_data.get_nurbs_flagu(spline_idx);
     const bool cyclic = flagsu & CU_NURB_CYCLIC;
     const bool endpoint = !cyclic && (flagsu & CU_NURB_ENDPOINT);
-    fh.write<eOBJSyntaxElement::nurbs_parameter_begin>();
+    fh.write_obj_nurbs_parm_begin();
     for (int i = 1; i <= total_control_points + 2; i++) {
       float parm = 1.0f * i / (total_control_points + 2 + 1);
       if (endpoint) {
@@ -489,11 +480,10 @@ void OBJWriter::write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh,
           parm = 1;
         }
       }
-      fh.write<eOBJSyntaxElement::nurbs_parameters>(parm);
+      fh.write_obj_nurbs_parm(parm);
     }
-    fh.write<eOBJSyntaxElement::nurbs_parameter_end>();
-
-    fh.write<eOBJSyntaxElement::nurbs_group_end>();
+    fh.write_obj_nurbs_parm_end();
+    fh.write_obj_nurbs_group_end();
   }
 }
 
@@ -501,6 +491,18 @@ void OBJWriter::write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh,
 /** \name .MTL writers.
  * \{ */
 
+static const char *tex_map_type_to_string[] = {
+    "map_Kd",
+    "map_Ks",
+    "map_Ns",
+    "map_d",
+    "map_refl",
+    "map_Ke",
+    "map_Bump",
+};
+BLI_STATIC_ASSERT(ARRAY_SIZE(tex_map_type_to_string) == (int)MTLTexMapType::Count,
+                  "array size mismatch");
+
 /**
  * Convert #float3 to string of space-separated numbers, with no leading or trailing space.
  * Only to be used in NON-performance-critical code.
@@ -541,9 +543,9 @@ void MTLWriter::write_header(const char *blen_filepath)
   const char *blen_basename = (blen_filepath && blen_filepath[0] != '\0') ?
                                   BLI_path_basename(blen_filepath) :
                                   "None";
-  fmt_handler_.write<eMTLSyntaxElement::string>("# Blender "s + BKE_blender_version_string() +
-                                                " MTL File: '" + blen_basename + "'\n");
-  fmt_handler_.write<eMTLSyntaxElement::string>("# www.blender.org\n");
+  fmt_handler_.write_string("# Blender "s + BKE_blender_version_string() + " MTL File: '" +
+                            blen_basename + "'");
+  fmt_handler_.write_string("# www.blender.org");
 }
 
 StringRefNull MTLWriter::mtl_file_path() const
@@ -556,67 +558,52 @@ void MTLWriter::write_bsdf_properties(const MTLMaterial &mtl)
   /* For various material properties, we only capture information
    * coming from the texture, or the default value of the socket.
    * When the texture is present, do not emit the default value. */
-  if (!mtl.tex_map_of_type(eMTLSyntaxElement::map_Ns).is_valid()) {
-    fmt_handler_.write<eMTLSyntaxElement::Ns>(mtl.Ns);
+  if (!mtl.tex_map_of_type(MTLTexMapType::Ns).is_valid()) {
+    fmt_handler_.write_mtl_float("Ns", mtl.Ns);
   }
-  fmt_handler_.write<eMTLSyntaxElement::Ka>(mtl.Ka.x, mtl.Ka.y, mtl.Ka.z);
-  if (!mtl.tex_map_of_type(eMTLSyntaxElement::map_Kd).is_valid()) {
-    fmt_handler_.write<eMTLSyntaxElement::Kd>(mtl.Kd.x, mtl.Kd.y, mtl.Kd.z);
+  fmt_handler_.write_mtl_float3("Ka", mtl.Ka.x, mtl.Ka.y, mtl.Ka.z);
+  if (!mtl.tex_map_of_type(MTLTexMapType::Kd).is_valid()) {
+    fmt_handler_.write_mtl_float3("Kd", mtl.Kd.x, mtl.Kd.y, mtl.Kd.z);
   }
-  if (!mtl.tex_map_of_type(eMTLSyntaxElement::map_Ks).is_valid()) {
-    fmt_handler_.write<eMTLSyntaxElement::Ks>(mtl.Ks.x, mtl.Ks.y, mtl.Ks.z);
+  if (!mtl.tex_map_of_type(MTLTexMapType::Ks).is_valid()) {
+    fmt_handler_.write_mtl_float3("Ks", mtl.Ks.x, mtl.Ks.y, mtl.Ks.z);
   }
-  if (!mtl.tex_map_of_type(eMTLSyntaxElement::map_Ke).is_valid()) {
-    fmt_handler_.write<eMTLSyntaxElement::Ke>(mtl.Ke.x, mtl.Ke.y, mtl.Ke.z);
+  if (!mtl.tex_map_of_type(MTLTexMapType::Ke).is_valid()) {
+    fmt_handler_.write_mtl_float3("Ke", mtl.Ke.x, mtl.Ke.y, mtl.Ke.z);
   }
-  fmt_handler_.write<eMTLSyntaxElement::Ni>(mtl.Ni);
-  if (!mtl.tex_map_of_type(eMTLSyntaxElement::map_d).is_valid()) {
-    fmt_handler_.write<eMTLSyntaxElement::d>(mtl.d);
+  fmt_handler_.write_mtl_float("Ni", mtl.Ni);
+  if (!mtl.tex_map_of_type(MTLTexMapType::d).is_valid()) {
+    fmt_handler_.write_mtl_float("d", mtl.d);
   }
-  fmt_handler_.write<eMTLSyntaxElement::illum>(mtl.illum);
+  fmt_handler_.write_mtl_illum(mtl.illum);
 }
 
-void MTLWriter::write_texture_map(
-    const MTLMaterial &mtl_material,
-    const Map<const eMTLSyntaxElement, tex_map_XX>::Item &texture_map,
-    const char *blen_filedir,
-    const char *dest_dir,
-    ePathReferenceMode path_mode,
-    Set<std::pair<std::string, std::string>> &copy_set)
+void MTLWriter::write_texture_map(const MTLMaterial &mtl_material,
+                                  MTLTexMapType texture_key,
+                                  const MTLTexMap &texture_map,
+                                  const char *blen_filedir,
+                                  const char *dest_dir,
+                                  ePathReferenceMode path_mode,
+                                  Set<std::pair<std::string, std::string>> &copy_set)
 {
   std::string options;
   /* Option strings should have their own leading spaces. */
-  if (texture_map.value.translation != float3{0.0f, 0.0f, 0.0f}) {
-    options.append(" -o ").append(float3_to_string(texture_map.value.translation));
+  if (texture_map.translation != float3{0.0f, 0.0f, 0.0f}) {
+    options.append(" -o ").append(float3_to_string(texture_map.translation));
   }
-  if (texture_map.value.scale != float3{1.0f, 1.0f, 1.0f}) {
-    options.append(" -s ").append(float3_to_string(texture_map.value.scale));
+  if (texture_map.scale != float3{1.0f, 1.0f, 1.0f}) {
+    options.append(" -s ").append(float3_to_string(texture_map.scale));
   }
-  if (texture_map.key == eMTLSyntaxElement::map_Bump && mtl_material.map_Bump_strength > 0.0001f) {
+  if (texture_key == MTLTexMapType::bump && mtl_material.map_Bump_strength > 0.0001f) {
     options.append(" -bm ").append(std::to_string(mtl_material.map_Bump_strength));
   }
 
   std::string path = path_reference(
-      texture_map.value.image_path.c_str(), blen_filedir, dest_dir, path_mode, &copy_set);
+      texture_map.image_path.c_str(), blen_filedir, dest_dir, path_mode, &copy_set);
   /* Always emit forward slashes for cross-platform compatibility. */
   std::replace(path.begin(), path.end(), '\\', '/');
 
-#define SYNTAX_DISPATCH(eMTLSyntaxElement) \
-  if (texture_map.key == eMTLSyntaxElement) { \
-    fmt_handler_.write<eMTLSyntaxElement>(options, path.c_str()); \
-    return; \
-  }
-
-  SYNTAX_DISPATCH(eMTLSyntaxElement::map_Kd);
-  SYNTAX_DISPATCH(eMTLSyntaxElement::map_Ks);
-  SYNTAX_DISPATCH(eMTLSyntaxElement::map_Ns);
-  SYNTAX_DISPATCH(eMTLSyntaxElement::map_d);
-  SYNTAX_DISPATCH(eMTLSyntaxElement::map_refl);
-  SYNTAX_DISPATCH(eMTLSyntaxElement::map_Ke);
-  SYNTAX_DISPATCH(eMTLSyntaxElement::map_Bump);
-#undef SYNTAX_DISPATCH
-
-  BLI_assert(!"This map type was not written to the file.");
+  fmt_handler_.write_mtl_map(tex_map_type_to_string[(int)texture_key], options, path);
 }
 
 void MTLWriter::write_materials(const char *blen_filepath,
@@ -637,14 +624,16 @@ void MTLWriter::write_materials(const char *blen_filepath,
             [](const MTLMaterial &a, const MTLMaterial &b) { return a.name < b.name; });
   Set<std::pair<std::string, std::string>> copy_set;
   for (const MTLMaterial &mtlmat : mtlmaterials_) {
-    fmt_handler_.write<eMTLSyntaxElement::string>("\n");
-    fmt_handler_.write<eMTLSyntaxElement::newmtl>(mtlmat.name);
+    fmt_handler_.write_string("");
+    fmt_handler_.write_mtl_newmtl(mtlmat.name);
     write_bsdf_properties(mtlmat);
-    for (const auto &tex : mtlmat.texture_maps.items()) {
-      if (!tex.value.is_valid()) {
+    for (int key = 0; key < (int)MTLTexMapType::Count; key++) {
+      const MTLTexMap &tex = mtlmat.texture_maps[key];
+      if (!tex.is_valid()) {
         continue;
       }
-      write_texture_map(mtlmat, tex, blen_filedir, dest_dir, path_mode, copy_set);
+      write_texture_map(
+          mtlmat, (MTLTexMapType)key, tex, blen_filedir, dest_dir, path_mode, copy_set);
     }
   }
   path_reference_copy(copy_set);
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh
index 97c23484426..4544037fbc1 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_file_writer.hh
@@ -66,7 +66,7 @@ class OBJWriter : NonMovable, NonCopyable {
   /**
    * Write object's name or group.
    */
-  void write_object_name(FormatHandler<eFileType::OBJ> &fh, const OBJMesh &obj_mesh_data) const;
+  void write_object_name(FormatHandler &fh, const OBJMesh &obj_mesh_data) const;
   /**
    * Write file name of Material Library in .OBJ file.
    */
@@ -74,19 +74,19 @@ class OBJWriter : NonMovable, NonCopyable {
   /**
    * Write vertex coordinates for all vertices as "v x y z" or "v x y z r g b".
    */
-  void write_vertex_coords(FormatHandler<eFileType::OBJ> &fh,
+  void write_vertex_coords(FormatHandler &fh,
                            const OBJMesh &obj_mesh_data,
                            bool write_colors) const;
   /**
    * Write UV vertex coordinates for all vertices as `vt u v`.
    * \note UV indices are stored here, but written with polygons later.
    */
-  void write_uv_coords(FormatHandler<eFileType::OBJ> &fh, OBJMesh &obj_mesh_data) const;
+  void write_uv_coords(FormatHandler &fh, OBJMesh &obj_mesh_data) const;
   /**
    * Write loop normals for smooth-shaded polygons, and polygon normals otherwise, as "vn x y z".
    * \note Normal indices ares stored here, but written with polygons later.
    */
-  void write_poly_normals(FormatHandler<eFileType::OBJ> &fh, OBJMesh &obj_mesh_data);
+  void write_poly_normals(FormatHandler &fh, OBJMesh &obj_mesh_data);
   /**
    * Write polygon elements with at least vertex indices, and conditionally with UV vertex
    * indices and polygon normal indices. Also write groups: smooth, vertex, material.
@@ -94,23 +94,23 @@ class OBJWriter : NonMovable, NonCopyable {
    * name used in the .obj file.
    * \note UV indices were stored while writing UV vertices.
    */
-  void write_poly_elements(FormatHandler<eFileType::OBJ> &fh,
+  void write_poly_elements(FormatHandler &fh,
                            const IndexOffsets &offsets,
                            const OBJMesh &obj_mesh_data,
                            std::function<const char *(int)> matname_fn);
   /**
    * Write loose edges of a mesh as "l v1 v2".
    */
-  void write_edges_indices(FormatHandler<eFileType::OBJ> &fh,
+  void write_edges_indices(FormatHandler &fh,
                            const IndexOffsets &offsets,
                            const OBJMesh &obj_mesh_data) const;
   /**
    * Write a NURBS curve to the .OBJ file in parameter form.
    */
-  void write_nurbs_curve(FormatHandler<eFileType::OBJ> &fh, const OBJCurve &obj_nurbs_data) const;
+  void write_nurbs_curve(FormatHandler &fh, const OBJCurve &obj_nurbs_data) const;
 
  private:
-  using func_vert_uv_normal_indices = void (OBJWriter::*)(FormatHandler<eFileType::OBJ> &fh,
+  using func_vert_uv_normal_indices = void (OBJWriter::*)(FormatHandler &fh,
                                                           const IndexOffsets &offsets,
                                                           Span<int> vert_indices,
                                                           Span<int> uv_indices,
@@ -124,7 +124,7 @@ class OBJWriter : NonMovable, NonCopyable {
   /**
    * Write one line of polygon indices as "f v1/vt1/vn1 v2/vt2/vn2 ...".
    */
-  void write_vert_uv_normal_indices(FormatHandler<eFileType::OBJ> &fh,
+  void write_vert_uv_normal_indices(FormatHandler &fh,
                                     const IndexOffsets &offsets,
                                     Span<int> vert_indices,
                                     Span<int> uv_indices,
@@ -133,7 +133,7 @@ class OBJWriter : NonMovable, NonCopyable {
   /**
    * Write one line of polygon indices as "f v1//vn1 v2//vn2 ...".
    */
-  void write_vert_normal_indices(FormatHandler<eFileType::OBJ> &fh,
+  void write_vert_normal_indices(FormatHandler &fh,
                                  const IndexOffsets &offsets,
                                  Span<int> vert_indices,
                                  Span<int> /*uv_indices*/,
@@ -142,7 +142,7 @@ class OBJWriter : NonMovable, NonCopyable {
   /**
    * Write one line of polygon indices as "f v1/vt1 v2/vt2 ...".
    */
-  void write_vert_uv_indices(FormatHandler<eFileType::OBJ> &fh,
+  void write_vert_uv_indices(FormatHandler &fh,
                              const IndexOffsets &offsets,
                              Span<int> vert_indices,
                              Span<int> uv_indices,
@@ -151,7 +151,7 @@ class OBJWriter : NonMovable, NonCopyable {
   /**
    * Write one line of polygon indices as "f v1 v2 ...".
    */
-  void write_vert_indices(FormatHandler<eFileType::OBJ> &fh,
+  void write_vert_indices(FormatHandler &fh,
                           const IndexOffsets &offsets,
                           Span<int> vert_indices,
                           Span<int> /*uv_indices*/,
@@ -164,7 +164,7 @@ class OBJWriter : NonMovable, NonCopyable {
  */
 class MTLWriter : NonMovable, NonCopyable {
  private:
-  FormatHandler<eFileType::MTL> fmt_handler_;
+  FormatHandler fmt_handler_;
   FILE *outfile_;
   std::string mtl_filepath_;
   Vector<MTLMaterial> mtlmaterials_;
@@ -208,7 +208,8 @@ class MTLWriter : NonMovable, NonCopyable {
    * Write a texture map in the form "map_XX -s 1. 1. 1. -o 0. 0. 0. [-bm 1.] path/to/image".
    */
   void write_texture_map(const MTLMaterial &mtl_material,
-                         const Map<const eMTLSyntaxElement, tex_map_XX>::Item &texture_map,
+                         MTLTexMapType texture_key,
+                         const MTLTexMap &texture_map,
                          const char *blen_filedir,
                          const char *dest_dir,
                          ePathReferenceMode mode,
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_io.hh b/source/blender/io/wavefront_obj/exporter/obj_export_io.hh
index 5413c9969e3..cc0f7c0824c 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_io.hh
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_io.hh
@@ -23,268 +23,24 @@
 
 namespace blender::io::obj {
 
-enum class eFileType {
-  OBJ,
-  MTL,
-};
-
-enum class eOBJSyntaxElement {
-  vertex_coords,
-  vertex_coords_color,
-  uv_vertex_coords,
-  normal,
-  poly_element_begin,
-  vertex_uv_normal_indices,
-  vertex_normal_indices,
-  vertex_uv_indices,
-  vertex_indices,
-  poly_element_end,
-  poly_usemtl,
-  edge,
-  cstype,
-  nurbs_degree,
-  curve_element_begin,
-  curve_element_end,
-  nurbs_parameter_begin,
-  nurbs_parameters,
-  nurbs_parameter_end,
-  nurbs_group_end,
-  new_line,
-  mtllib,
-  smooth_group,
-  object_group,
-  object_name,
-  /* Use rarely. New line is NOT included for string. */
-  string,
-};
-
-enum class eMTLSyntaxElement {
-  newmtl,
-  Ni,
-  d,
-  Ns,
-  illum,
-  Ka,
-  Kd,
-  Ks,
-  Ke,
-  map_Kd,
-  map_Ks,
-  map_Ns,
-  map_d,
-  map_refl,
-  map_Ke,
-  map_Bump,
-  /* Use rarely. New line is NOT included for string. */
-  string,
-};
-
-template<eFileType filetype> struct FileTypeTraits;
-
-/* Used to prevent mixing of say OBJ file format with MTL syntax elements. */
-template<> struct FileTypeTraits<eFileType::OBJ> {
-  using SyntaxType = eOBJSyntaxElement;
-};
-
-template<> struct FileTypeTraits<eFileType::MTL> {
-  using SyntaxType = eMTLSyntaxElement;
-};
-
-struct FormattingSyntax {
-  /* Formatting syntax with the file format key like `newmtl %s\n`. */
-  const char *fmt = nullptr;
-  /* Number of arguments needed by the syntax. */
-  const int total_args = 0;
-  /* Whether types of the given arguments are accepted by the syntax above. Fail to compile by
-   * default.
-   */
-  const bool are_types_valid = false;
-};
-
-/**
- * Type dependent but always false. Use to add a `constexpr` conditional compile-time error.
- */
-template<typename T> struct always_false : std::false_type {
-};
-
-template<typename... T>
-constexpr bool is_type_float = (... && std::is_floating_point_v<std::decay_t<T>>);
-
-template<typename... T>
-constexpr bool is_type_integral = (... && std::is_integral_v<std::decay_t<T>>);
-
-template<typename... T>
-constexpr bool is_type_string_related = (... && std::is_constructible_v<std::string, T>);
-
-/* GCC (at least 9.3) while compiling the obj_exporter_tests.cc with optimizations on,
- * results in "obj_export_io.hh:205:18: warning: ‘%s’ directive output truncated writing 34 bytes
- * into a region of size 6" and similar warnings. Yes the output is truncated, and that is covered
- * as an edge case by tests on purpose. */
-#if defined(__GNUC__) && !defined(__clang__)
-#  pragma GCC diagnostic push
-#  pragma GCC diagnostic ignored "-Wformat-truncation"
-#endif
-template<typename... T>
-constexpr FormattingSyntax syntax_elem_to_formatting(const eOBJSyntaxElement key)
-{
-  switch (key) {
-    case eOBJSyntaxElement::vertex_coords: {
-      return {"v {:.6f} {:.6f} {:.6f}\n", 3, is_type_float<T...>};
-    }
-    case eOBJSyntaxElement::vertex_coords_color: {
-      return {"v {:.6f} {:.6f} {:.6f} {:.4f} {:.4f} {:.4f}\n", 6, is_type_float<T...>};
-    }
-    case eOBJSyntaxElement::uv_vertex_coords: {
-      return {"vt {:.6f} {:.6f}\n", 2, is_type_float<T...>};
-    }
-    case eOBJSyntaxElement::normal: {
-      return {"vn {:.4f} {:.4f} {:.4f}\n", 3, is_type_float<T...>};
-    }
-    case eOBJSyntaxElement::poly_element_begin: {
-      return {"f", 0, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::vertex_uv_normal_indices: {
-      return {" {}/{}/{}", 3, is_type_integral<T...>};
-    }
-    case eOBJSyntaxElement::vertex_normal_indices: {
-      return {" {}//{}", 2, is_type_integral<T...>};
-    }
-    case eOBJSyntaxElement::vertex_uv_indices: {
-      return {" {}/{}", 2, is_type_integral<T...>};
-    }
-    case eOBJSyntaxElement::vertex_indices: {
-      return {" {}", 1, is_type_integral<T...>};
-    }
-    case eOBJSyntaxElement::poly_usemtl: {
-      return {"usemtl {}\n", 1, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::edge: {
-      return {"l {} {}\n", 2, is_type_integral<T...>};
-    }
-    case eOBJSyntaxElement::cstype: {
-      return {"cstype bspline\n", 0, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::nurbs_degree: {
-      return {"deg {}\n", 1, is_type_integral<T...>};
-    }
-    case eOBJSyntaxElement::curve_element_begin: {
-      return {"curv 0.0 1.0", 0, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::nurbs_parameter_begin: {
-      return {"parm u 0.0", 0, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::nurbs_parameters: {
-      return {" {:.6f}", 1, is_type_float<T...>};
-    }
-    case eOBJSyntaxElement::nurbs_parameter_end: {
-      return {" 1.0\n", 0, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::nurbs_group_end: {
-      return {"end\n", 0, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::poly_element_end: {
-      ATTR_FALLTHROUGH;
-    }
-    case eOBJSyntaxElement::curve_element_end: {
-      ATTR_FALLTHROUGH;
-    }
-    case eOBJSyntaxElement::new_line: {
-      return {"\n", 0, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::mtllib: {
-      return {"mtllib {}\n", 1, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::smooth_group: {
-      return {"s {}\n", 1, is_type_integral<T...>};
-    }
-    case eOBJSyntaxElement::object_group: {
-      return {"g {}\n", 1, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::object_name: {
-      return {"o {}\n", 1, is_type_string_related<T...>};
-    }
-    case eOBJSyntaxElement::string: {
-      return {"{}", 1, is_type_string_related<T...>};
-    }
-  }
-}
-
-template<typename... T>
-constexpr FormattingSyntax syntax_elem_to_formatting(const eMTLSyntaxElement key)
-{
-  switch (key) {
-    case eMTLSyntaxElement::newmtl: {
-      return {"newmtl {}\n", 1, is_type_string_related<T...>};
-    }
-    case eMTLSyntaxElement::Ni: {
-      return {"Ni {:.6f}\n", 1, is_type_float<T...>};
-    }
-    case eMTLSyntaxElement::d: {
-      return {"d {:.6f}\n", 1, is_type_float<T...>};
-    }
-    case eMTLSyntaxElement::Ns: {
-      return {"Ns {:.6f}\n", 1, is_type_float<T...>};
-    }
-    case eMTLSyntaxElement::illum: {
-      return {"illum {}\n", 1, is_type_integral<T...>};
-    }
-    case eMTLSyntaxElement::Ka: {
-      return {"Ka {:.6f} {:.6f} {:.6f}\n", 3, is_type_float<T...>};
-    }
-    case eMTLSyntaxElement::Kd: {
-      return {"Kd {:.6f} {:.6f} {:.6f}\n", 3, is_type_float<T...>};
-    }
-    case eMTLSyntaxElement::Ks: {
-      return {"Ks {:.6f} {:.6f} {:.6f}\n", 3, is_type_float<T...>};
-    }
-    case eMTLSyntaxElement::Ke: {
-      return {"Ke {:.6f} {:.6f} {:.6f}\n", 3, is_type_float<T...>};
-    }
-    /* NOTE: first texture map related argument, if present, will have its own leading space. */
-    case eMTLSyntaxElement::map_Kd: {
-      return {"map_Kd{} {}\n", 2, is_type_string_related<T...>};
-    }
-    case eMTLSyntaxElement::map_Ks: {
-      return {"map_Ks{} {}\n", 2, is_type_string_related<T...>};
-    }
-    case eMTLSyntaxElement::map_Ns: {
-      return {"map_Ns{} {}\n", 2, is_type_string_related<T...>};
-    }
-    case eMTLSyntaxElement::map_d: {
-      return {"map_d{} {}\n", 2, is_type_string_related<T...>};
-    }
-    case eMTLSyntaxElement::map_refl: {
-      return {"map_refl{} {}\n", 2, is_type_string_related<T...>};
-    }
-    case eMTLSyntaxElement::map_Ke: {
-      return {"map_Ke{} {}\n", 2, is_type_string_related<T...>};
-    }
-    case eMTLSyntaxElement::map_Bump: {
-      return {"map_Bump{} {}\n", 2, is_type_string_related<T...>};
-    }
-    case eMTLSyntaxElement::string: {
-      return {"{}", 1, is_type_string_related<T...>};
-    }
-  }
-}
-#if defined(__GNUC__) && !defined(__clang__)
-#  pragma GCC diagnostic pop
-#endif
-
 /**
- * File format and syntax agnostic file buffer writer.
+ * File buffer writer.
  * All writes are done into an internal chunked memory buffer
  * (list of default 64 kilobyte blocks).
  * Call write_fo_file once in a while to write the memory buffer(s)
  * into the given file.
  */
-template<eFileType filetype, size_t buffer_chunk_size = 64 * 1024>
 class FormatHandler : NonCopyable, NonMovable {
  private:
   typedef std::vector<char> VectorChar;
   std::vector<VectorChar> blocks_;
+  size_t buffer_chunk_size_;
 
  public:
+  FormatHandler(size_t buffer_chunk_size = 64 * 1024) : buffer_chunk_size_(buffer_chunk_size)
+  {
+  }
+
   /* Write contents to the buffer(s) into a file, and clear the buffers. */
   void write_to_file(FILE *f)
   {
@@ -305,7 +61,7 @@ class FormatHandler : NonCopyable, NonMovable {
     return blocks_.size();
   }
 
-  void append_from(FormatHandler<filetype, buffer_chunk_size> &v)
+  void append_from(FormatHandler &v)
   {
     blocks_.insert(blocks_.end(),
                    std::make_move_iterator(v.blocks_.begin()),
@@ -313,24 +69,132 @@ class FormatHandler : NonCopyable, NonMovable {
     v.blocks_.clear();
   }
 
-  /**
-   * Example invocation: `writer->write<eMTLSyntaxElement::newmtl>("foo")`.
-   *
-   * \param key: Must match what the instance's filetype expects; i.e., `eMTLSyntaxElement` for
-   * `eFileType::MTL`.
-   */
-  template<typename FileTypeTraits<filetype>::SyntaxType key, typename... T>
-  constexpr void write(T &&...args)
-  {
-    /* Get format syntax, number of arguments expected and whether types of given arguments are
-     * valid.
-     */
-    constexpr FormattingSyntax fmt_nargs_valid = syntax_elem_to_formatting<T...>(key);
-    BLI_STATIC_ASSERT(fmt_nargs_valid.are_types_valid &&
-                          (sizeof...(T) == fmt_nargs_valid.total_args),
-                      "Types of all arguments and the number of arguments should match what the "
-                      "formatting specifies.");
-    write_impl(fmt_nargs_valid.fmt, std::forward<T>(args)...);
+  void write_obj_vertex(float x, float y, float z)
+  {
+    write_impl("v {:.6f} {:.6f} {:.6f}\n", x, y, z);
+  }
+  void write_obj_vertex_color(float x, float y, float z, float r, float g, float b)
+  {
+    write_impl("v {:.6f} {:.6f} {:.6f} {:.4f} {:.4f} {:.4f}\n", x, y, z, r, g, b);
+  }
+  void write_obj_uv(float x, float y)
+  {
+    write_impl("vt {:.6f} {:.6f}\n", x, y);
+  }
+  void write_obj_normal(float x, float y, float z)
+  {
+    write_impl("vn {:.4f} {:.4f} {:.4f}\n", x, y, z);
+  }
+  void write_obj_poly_begin()
+  {
+    write_impl("f");
+  }
+  void write_obj_poly_end()
+  {
+    write_obj_newline();
+  }
+  void write_obj_poly_v_uv_normal(int v, int uv, int n)
+  {
+    write_impl(" {}/{}/{}", v, uv, n);
+  }
+  void write_obj_poly_v_normal(int v, int n)
+  {
+    write_impl(" {}//{}", v, n);
+  }
+  void write_obj_poly_v_uv(int v, int uv)
+  {
+    write_impl(" {}/{}", v, uv);
+  }
+  void write_obj_poly_v(int v)
+  {
+    write_impl(" {}", v);
+  }
+  void write_obj_usemtl(StringRef s)
+  {
+    write_impl("usemtl {}\n", s);
+  }
+  void write_obj_mtllib(StringRef s)
+  {
+    write_impl("mtllib {}\n", s);
+  }
+  void write_obj_smooth(int s)
+  {
+    write_impl("s {}\n", s);
+  }
+  void write_obj_group(StringRef s)
+  {
+    write_impl("g {}\n", s);
+  }
+  void write_obj_object(StringRef s)
+  {
+    write_impl("o {}\n", s);
+  }
+  void write_obj_edge(int a, int b)
+  {
+    write_impl("l {} {}\n", a, b);
+  }
+  void write_obj_cstype()
+  {
+    write_impl("cstype bspline\n");
+  }
+  void write_obj_nurbs_degree(int deg)
+  {
+    write_impl("deg {}\n", deg);
+  }
+  void write_obj_curve_begin()
+  {
+    write_impl("curv 0.0 1.0");
+  }
+  void write_obj_curve_end()
+  {
+    write_obj_newline();
+  }
+  void write_obj_nurbs_parm_begin()
+  {
+    write_impl("parm u 0.0");
+  }
+  void write_obj_nurbs_parm(float v)
+  {
+    write_impl(" {:.6f}", v);
+  }
+  void write_obj_nurbs_parm_end()
+  {
+    write_impl(" 1.0\n");
+  }
+  void write_obj_nurbs_group_end()
+  {
+    write_impl("end\n");
+  }
+  void write_obj_newline()
+  {
+    write_impl("\n");
+  }
+
+  void write_mtl_newmtl(StringRef s)
+  {
+    write_impl("newmtl {}\n", s);
+  }
+  void write_mtl_float(const char *type, float v)
+  {
+    write_impl("{} {:.6f}\n", type, v);
+  }
+  void write_mtl_float3(const char *type, float r, float g, float b)
+  {
+    write_impl("{} {:.6f} {:.6f} {:.6f}\n", type, r, g, b);
+  }
+  void write_mtl_illum(int mode)
+  {
+    write_impl("illum {}\n", mode);
+  }
+  /* Note: options, if present, will have its own leading space. */
+  void write_mtl_map(const char *type, StringRef options, StringRef value)
+  {
+    write_impl("{}{} {}\n", type, options, value);
+  }
+
+  void write_string(StringRef s)
+  {
+    write_impl("{}\n", s);
   }
 
  private:
@@ -340,7 +204,7 @@ class FormatHandler : NonCopyable, NonMovable {
   {
     if (blocks_.empty() || (blocks_.back().capacity() - blocks_.back().size() < at_least)) {
       VectorChar &b = blocks_.emplace_back(VectorChar());
-      b.reserve(std::max(at_least, buffer_chunk_size));
+      b.reserve(std::max(at_least, buffer_chunk_size_));
     }
   }
 
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_mtl.cc b/source/blender/io/wavefront_obj/exporter/obj_export_mtl.cc
index 4ed148ec64e..0b228ef8c37 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_mtl.cc
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_mtl.cc
@@ -6,6 +6,7 @@
 
 #include "BKE_image.h"
 #include "BKE_node.h"
+#include "BKE_node_runtime.hh"
 
 #include "BLI_map.hh"
 #include "BLI_math_vector.h"
@@ -15,13 +16,23 @@
 #include "DNA_material_types.h"
 #include "DNA_node_types.h"
 
-#include "NOD_node_tree_ref.hh"
-
 #include "obj_export_mesh.hh"
 #include "obj_export_mtl.hh"
 
 namespace blender::io::obj {
 
+const char *tex_map_type_to_socket_id[] = {
+    "Base Color",
+    "Specular",
+    "Roughness",
+    "Alpha",
+    "Metallic",
+    "Emission",
+    "Normal",
+};
+BLI_STATIC_ASSERT(ARRAY_SIZE(tex_map_type_to_socket_id) == (int)MTLTexMapType::Count,
+                  "array size mismatch");
+
 /**
  * Copy a float property of the given type from the bNode to given buffer.
  */
@@ -72,25 +83,25 @@ static void copy_property_from_node(const eNodeSocketDatatype property_type,
  * Collect all the source sockets linked to the destination socket in a destination node.
  */
 static void linked_sockets_to_dest_id(const bNode *dest_node,
-                                      const nodes::NodeTreeRef &node_tree,
-                                      StringRefNull dest_socket_id,
-                                      Vector<const nodes::OutputSocketRef *> &r_linked_sockets)
+                                      const bNodeTree &node_tree,
+                                      const char *dest_socket_id,
+                                      Vector<const bNodeSocket *> &r_linked_sockets)
 {
   r_linked_sockets.clear();
   if (!dest_node) {
     return;
   }
-  Span<const nodes::NodeRef *> object_dest_nodes = node_tree.nodes_by_type(dest_node->idname);
-  Span<const nodes::InputSocketRef *> dest_inputs = object_dest_nodes.first()->inputs();
-  const nodes::InputSocketRef *dest_socket = nullptr;
-  for (const nodes::InputSocketRef *curr_socket : dest_inputs) {
-    if (STREQ(curr_socket->bsocket()->identifier, dest_socket_id.c_str())) {
+  Span<const bNode *> object_dest_nodes = node_tree.nodes_by_type(dest_node->idname);
+  Span<const bNodeSocket *> dest_inputs = object_dest_nodes.first()->input_sockets();
+  const bNodeSocket *dest_socket = nullptr;
+  for (const bNodeSocket *curr_socket : dest_inputs) {
+    if (STREQ(curr_socket->identifier, dest_socket_id)) {
       dest_socket = curr_socket;
       break;
     }
   }
   if (dest_socket) {
-    Span<const nodes::OutputSocketRef *> linked_sockets = dest_socket->directly_linked_sockets();
+    Span<const bNodeSocket *> linked_sockets = dest_socket->directly_linked_sockets();
     r_linked_sockets.resize(linked_sockets.size());
     r_linked_sockets = linked_sockets;
   }
@@ -99,13 +110,12 @@ static void linked_sockets_to_dest_id(const bNode *dest_node,
 /**
  * From a list of sockets, get the parent node which is of the given node type.
  */
-static const bNode *get_node_of_type(Span<const nodes::OutputSocketRef *> sockets_list,
-                                     const int node_type)
+static const bNode *get_node_of_type(Span<const bNodeSocket *> sockets_list, const int node_type)
 {
-  for (const nodes::SocketRef *socket : sockets_list) {
-    const bNode *parent_node = socket->bnode();
-    if (parent_node->typeinfo->type == node_type) {
-      return parent_node;
+  for (const bNodeSocket *socket : sockets_list) {
+    const bNode &parent_node = socket->owner_node();
+    if (parent_node.typeinfo->type == node_type) {
+      return &parent_node;
     }
   }
   return nullptr;
@@ -141,16 +151,16 @@ static const char *get_image_filepath(const bNode *tex_node)
  * We only want one that feeds directly into a Material Output node
  * (that is the behavior of the legacy Python exporter).
  */
-static const nodes::NodeRef *find_bsdf_node(const nodes::NodeTreeRef *nodetree)
+static const bNode *find_bsdf_node(const bNodeTree *nodetree)
 {
   if (!nodetree) {
     return nullptr;
   }
-  for (const nodes::NodeRef *node : nodetree->nodes_by_type("ShaderNodeOutputMaterial")) {
-    const nodes::InputSocketRef *node_input_socket0 = node->inputs()[0];
-    for (const nodes::OutputSocketRef *out_sock : node_input_socket0->directly_linked_sockets()) {
-      const nodes::NodeRef &in_node = out_sock->node();
-      if (in_node.typeinfo()->type == SH_NODE_BSDF_PRINCIPLED) {
+  for (const bNode *node : nodetree->nodes_by_type("ShaderNodeOutputMaterial")) {
+    const bNodeSocket &node_input_socket0 = node->input_socket(0);
+    for (const bNodeSocket *out_sock : node_input_socket0.directly_linked_sockets()) {
+      const bNode &in_node = out_sock->owner_node();
+      if (in_node.typeinfo->type == SH_NODE_BSDF_PRINCIPLED) {
         return &in_node;
       }
     }
@@ -161,55 +171,50 @@ static const nodes::NodeRef *find_bsdf_node(const nodes::NodeTreeRef *nodetree)
 /**
  * Store properties found either in bNode or material into r_mtl_mat.
  */
-static void store_bsdf_properties(const nodes::NodeRef *bsdf_node,
+static void store_bsdf_properties(const bNode *bsdf_node,
                                   const Material *material,
                                   MTLMaterial &r_mtl_mat)
 {
-  const bNode *bnode = nullptr;
-  if (bsdf_node) {
-    bnode = bsdf_node->bnode();
-  }
-
   /* If p-BSDF is not present, fallback to #Object.Material. */
   float roughness = material->roughness;
-  if (bnode) {
-    copy_property_from_node(SOCK_FLOAT, bnode, "Roughness", {&roughness, 1});
+  if (bsdf_node) {
+    copy_property_from_node(SOCK_FLOAT, bsdf_node, "Roughness", {&roughness, 1});
   }
   /* Empirical approximation. Importer should use the inverse of this method. */
   float spec_exponent = (1.0f - roughness);
   spec_exponent *= spec_exponent * 1000.0f;
 
   float specular = material->spec;
-  if (bnode) {
-    copy_property_from_node(SOCK_FLOAT, bnode, "Specular", {&specular, 1});
+  if (bsdf_node) {
+    copy_property_from_node(SOCK_FLOAT, bsdf_node, "Specular", {&specular, 1});
   }
 
   float metallic = material->metallic;
-  if (bnode) {
-    copy_property_from_node(SOCK_FLOAT, bnode, "Metallic", {&metallic, 1});
+  if (bsdf_node) {
+    copy_property_from_node(SOCK_FLOAT, bsdf_node, "Metallic", {&metallic, 1});
   }
 
   float refraction_index = 1.0f;
-  if (bnode) {
-    copy_property_from_node(SOCK_FLOAT, bnode, "IOR", {&refraction_index, 1});
+  if (bsdf_node) {
+    copy_property_from_node(SOCK_FLOAT, bsdf_node, "IOR", {&refraction_index, 1});
   }
 
   float dissolved = material->a;
-  if (bnode) {
-    copy_property_from_node(SOCK_FLOAT, bnode, "Alpha", {&dissolved, 1});
+  if (bsdf_node) {
+    copy_property_from_node(SOCK_FLOAT, bsdf_node, "Alpha", {&dissolved, 1});
   }
   const bool transparent = dissolved != 1.0f;
 
   float3 diffuse_col = {material->r, material->g, material->b};
-  if (bnode) {
-    copy_property_from_node(SOCK_RGBA, bnode, "Base Color", {diffuse_col, 3});
+  if (bsdf_node) {
+    copy_property_from_node(SOCK_RGBA, bsdf_node, "Base Color", {diffuse_col, 3});
   }
 
   float3 emission_col{0.0f};
   float emission_strength = 0.0f;
-  if (bnode) {
-    copy_property_from_node(SOCK_FLOAT, bnode, "Emission Strength", {&emission_strength, 1});
-    copy_property_from_node(SOCK_RGBA, bnode, "Emission", {emission_col, 3});
+  if (bsdf_node) {
+    copy_property_from_node(SOCK_FLOAT, bsdf_node, "Emission Strength", {&emission_strength, 1});
+    copy_property_from_node(SOCK_RGBA, bsdf_node, "Emission", {emission_col, 3});
   }
   mul_v3_fl(emission_col, emission_strength);
 
@@ -253,8 +258,8 @@ static void store_bsdf_properties(const nodes::NodeRef *bsdf_node,
 /**
  * Store image texture options and file-paths in `r_mtl_mat`.
  */
-static void store_image_textures(const nodes::NodeRef *bsdf_node,
-                                 const nodes::NodeTreeRef *node_tree,
+static void store_image_textures(const bNode *bsdf_node,
+                                 const bNodeTree *node_tree,
                                  const Material *material,
                                  MTLMaterial &r_mtl_mat)
 {
@@ -262,21 +267,20 @@ static void store_image_textures(const nodes::NodeRef *bsdf_node,
     /* No nodetree, no images, or no Principled BSDF node. */
     return;
   }
-  const bNode *bnode = bsdf_node->bnode();
 
   /* Normal Map Texture has two extra tasks of:
    * - finding a Normal Map node before finding a texture node.
    * - finding "Strength" property of the node for `-bm` option.
    */
 
-  for (Map<const eMTLSyntaxElement, tex_map_XX>::MutableItem texture_map :
-       r_mtl_mat.texture_maps.items()) {
-    Vector<const nodes::OutputSocketRef *> linked_sockets;
+  for (int key = 0; key < (int)MTLTexMapType::Count; ++key) {
+    MTLTexMap &value = r_mtl_mat.texture_maps[key];
+    Vector<const bNodeSocket *> linked_sockets;
     const bNode *normal_map_node{nullptr};
 
-    if (texture_map.key == eMTLSyntaxElement::map_Bump) {
+    if (key == (int)MTLTexMapType::bump) {
       /* Find sockets linked to destination "Normal" socket in P-BSDF node. */
-      linked_sockets_to_dest_id(bnode, *node_tree, "Normal", linked_sockets);
+      linked_sockets_to_dest_id(bsdf_node, *node_tree, "Normal", linked_sockets);
       /* Among the linked sockets, find Normal Map shader node. */
       normal_map_node = get_node_of_type(linked_sockets, SH_NODE_NORMAL_MAP);
 
@@ -285,16 +289,17 @@ static void store_image_textures(const nodes::NodeRef *bsdf_node,
     }
     else {
       /* Skip emission map if emission strength is zero. */
-      if (texture_map.key == eMTLSyntaxElement::map_Ke) {
+      if (key == (int)MTLTexMapType::Ke) {
         float emission_strength = 0.0f;
-        copy_property_from_node(SOCK_FLOAT, bnode, "Emission Strength", {&emission_strength, 1});
+        copy_property_from_node(
+            SOCK_FLOAT, bsdf_node, "Emission Strength", {&emission_strength, 1});
         if (emission_strength == 0.0f) {
           continue;
         }
       }
       /* Find sockets linked to the destination socket of interest, in P-BSDF node. */
       linked_sockets_to_dest_id(
-          bnode, *node_tree, texture_map.value.dest_socket_id, linked_sockets);
+          bsdf_node, *node_tree, tex_map_type_to_socket_id[key], linked_sockets);
     }
 
     /* Among the linked sockets, find Image Texture shader node. */
@@ -317,10 +322,10 @@ static void store_image_textures(const nodes::NodeRef *bsdf_node,
     }
     /* Texture transform options. Only translation (origin offset, "-o") and scale
      * ("-o") are supported. */
-    copy_property_from_node(SOCK_VECTOR, mapping, "Location", {texture_map.value.translation, 3});
-    copy_property_from_node(SOCK_VECTOR, mapping, "Scale", {texture_map.value.scale, 3});
+    copy_property_from_node(SOCK_VECTOR, mapping, "Location", {value.translation, 3});
+    copy_property_from_node(SOCK_VECTOR, mapping, "Scale", {value.scale, 3});
 
-    texture_map.value.image_path = tex_image_filepath;
+    value.image_path = tex_image_filepath;
   }
 }
 
@@ -330,14 +335,14 @@ MTLMaterial mtlmaterial_for_material(const Material *material)
   MTLMaterial mtlmat;
   mtlmat.name = std::string(material->id.name + 2);
   std::replace(mtlmat.name.begin(), mtlmat.name.end(), ' ', '_');
-  const nodes::NodeTreeRef *nodetree = nullptr;
-  if (material->nodetree) {
-    nodetree = new nodes::NodeTreeRef(material->nodetree);
+  const bNodeTree *nodetree = material->nodetree;
+  if (nodetree != nullptr) {
+    nodetree->ensure_topology_cache();
   }
-  const nodes::NodeRef *bsdf_node = find_bsdf_node(nodetree);
+
+  const bNode *bsdf_node = find_bsdf_node(nodetree);
   store_bsdf_properties(bsdf_node, material, mtlmat);
   store_image_textures(bsdf_node, nodetree, material, mtlmat);
-  delete nodetree;
   return mtlmat;
 }
 
diff --git a/source/blender/io/wavefront_obj/exporter/obj_export_mtl.hh b/source/blender/io/wavefront_obj/exporter/obj_export_mtl.hh
index f83b3b49bf5..d8eafff107b 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_export_mtl.hh
+++ b/source/blender/io/wavefront_obj/exporter/obj_export_mtl.hh
@@ -6,36 +6,23 @@
 
 #pragma once
 
-#include "BLI_map.hh"
 #include "BLI_math_vec_types.hh"
 
 #include "DNA_node_types.h"
-#include "obj_export_io.hh"
-
-namespace blender {
-template<> struct DefaultHash<io::obj::eMTLSyntaxElement> {
-  uint64_t operator()(const io::obj::eMTLSyntaxElement value) const
-  {
-    return static_cast<uint64_t>(value);
-  }
-};
-
-}  // namespace blender
+struct Material;
 
 namespace blender::io::obj {
 
-/**
- * Generic container for texture node properties.
- */
-struct tex_map_XX {
-  tex_map_XX(StringRef to_socket_id) : dest_socket_id(to_socket_id){};
+enum class MTLTexMapType { Kd = 0, Ks, Ns, d, refl, Ke, bump, Count };
+extern const char *tex_map_type_to_socket_id[];
+
+struct MTLTexMap {
   bool is_valid() const
   {
     return !image_path.empty();
   }
 
   /* Target socket which this texture node connects to. */
-  const std::string dest_socket_id;
   float3 translation{0.0f};
   float3 scale{1.0f};
   /* Only Flat and Sphere projections are supported. */
@@ -48,26 +35,13 @@ struct tex_map_XX {
  * Container suited for storing Material data for/from a .MTL file.
  */
 struct MTLMaterial {
-  MTLMaterial()
-  {
-    texture_maps.add(eMTLSyntaxElement::map_Kd, tex_map_XX("Base Color"));
-    texture_maps.add(eMTLSyntaxElement::map_Ks, tex_map_XX("Specular"));
-    texture_maps.add(eMTLSyntaxElement::map_Ns, tex_map_XX("Roughness"));
-    texture_maps.add(eMTLSyntaxElement::map_d, tex_map_XX("Alpha"));
-    texture_maps.add(eMTLSyntaxElement::map_refl, tex_map_XX("Metallic"));
-    texture_maps.add(eMTLSyntaxElement::map_Ke, tex_map_XX("Emission"));
-    texture_maps.add(eMTLSyntaxElement::map_Bump, tex_map_XX("Normal"));
-  }
-
-  const tex_map_XX &tex_map_of_type(const eMTLSyntaxElement key) const
+  const MTLTexMap &tex_map_of_type(MTLTexMapType key) const
   {
-    BLI_assert(texture_maps.contains(key));
-    return texture_maps.lookup(key);
+    return texture_maps[(int)key];
   }
-  tex_map_XX &tex_map_of_type(const eMTLSyntaxElement key)
+  MTLTexMap &tex_map_of_type(MTLTexMapType key)
   {
-    BLI_assert(texture_maps.contains(key));
-    return texture_maps.lookup(key);
+    return texture_maps[(int)key];
   }
 
   std::string name;
@@ -81,7 +55,7 @@ struct MTLMaterial {
   float Ni{-1.0f};
   float d{-1.0f};
   int illum{-1};
-  Map<const eMTLSyntaxElement, tex_map_XX> texture_maps;
+  MTLTexMap texture_maps[(int)MTLTexMapType::Count];
   /** Only used for Normal Map node: "map_Bump". */
   float map_Bump_strength{-1.0f};
 };
diff --git a/source/blender/io/wavefront_obj/exporter/obj_exporter.cc b/source/blender/io/wavefront_obj/exporter/obj_exporter.cc
index 77d4f6268bc..76cf9066bf4 100644
--- a/source/blender/io/wavefront_obj/exporter/obj_exporter.cc
+++ b/source/blender/io/wavefront_obj/exporter/obj_exporter.cc
@@ -143,7 +143,7 @@ static void write_mesh_objects(Vector<std::unique_ptr<OBJMesh>> exportable_as_me
    * we have to have the output text buffer for each object,
    * and write them all into the file at the end. */
   size_t count = exportable_as_mesh.size();
-  std::vector<FormatHandler<eFileType::OBJ>> buffers(count);
+  std::vector<FormatHandler> buffers(count);
 
   /* Serial: gather material indices, ensure normals & edges. */
   Vector<Vector<int>> mtlindices;
@@ -242,7 +242,7 @@ static void write_mesh_objects(Vector<std::unique_ptr<OBJMesh>> exportable_as_me
 static void write_nurbs_curve_objects(const Vector<std::unique_ptr<OBJCurve>> &exportable_as_nurbs,
                                       const OBJWriter &obj_writer)
 {
-  FormatHandler<eFileType::OBJ> fh;
+  FormatHandler fh;
   /* #OBJCurve doesn't have any dynamically allocated memory, so it's fine
    * to wait for #blender::Vector to clean the objects up. */
   for (const std::unique_ptr<OBJCurve> &obj_curve : exportable_as_nurbs) {
diff --git a/source/blender/io/wavefront_obj/importer/obj_import_file_reader.cc b/source/blender/io/wavefront_obj/importer/obj_import_file_reader.cc
index 633f70b2e38..088784b4194 100644
--- a/source/blender/io/wavefront_obj/importer/obj_import_file_reader.cc
+++ b/source/blender/io/wavefront_obj/importer/obj_import_file_reader.cc
@@ -592,36 +592,31 @@ void OBJParser::parse(Vector<std::unique_ptr<Geometry>> &r_all_geometries,
   add_default_mtl_library();
 }
 
-static eMTLSyntaxElement mtl_line_start_to_enum(const char *&p, const char *end)
+static MTLTexMapType mtl_line_start_to_texture_type(const char *&p, const char *end)
 {
   if (parse_keyword(p, end, "map_Kd")) {
-    return eMTLSyntaxElement::map_Kd;
+    return MTLTexMapType::Kd;
   }
   if (parse_keyword(p, end, "map_Ks")) {
-    return eMTLSyntaxElement::map_Ks;
+    return MTLTexMapType::Ks;
   }
   if (parse_keyword(p, end, "map_Ns")) {
-    return eMTLSyntaxElement::map_Ns;
+    return MTLTexMapType::Ns;
   }
   if (parse_keyword(p, end, "map_d")) {
-    return eMTLSyntaxElement::map_d;
+    return MTLTexMapType::d;
   }
-  if (parse_keyword(p, end, "refl")) {
-    return eMTLSyntaxElement::map_refl;
-  }
-  if (parse_keyword(p, end, "map_refl")) {
-    return eMTLSyntaxElement::map_refl;
+  if (parse_keyword(p, end, "refl") || parse_keyword(p, end, "map_refl")) {
+    return MTLTexMapType::refl;
   }
   if (parse_keyword(p, end, "map_Ke")) {
-    return eMTLSyntaxElement::map_Ke;
-  }
-  if (parse_keyword(p, end, "bump")) {
-    return eMTLSyntaxElement::map_Bump;
+    return MTLTexMapType::Ke;
   }
-  if (parse_keyword(p, end, "map_Bump") || parse_keyword(p, end, "map_bump")) {
-    return eMTLSyntaxElement::map_Bump;
+  if (parse_keyword(p, end, "bump") || parse_keyword(p, end, "map_Bump") ||
+      parse_keyword(p, end, "map_bump")) {
+    return MTLTexMapType::bump;
   }
-  return eMTLSyntaxElement::string;
+  return MTLTexMapType::Count;
 }
 
 static const std::pair<StringRef, int> unsupported_texture_options[] = {
@@ -639,7 +634,7 @@ static const std::pair<StringRef, int> unsupported_texture_options[] = {
 static bool parse_texture_option(const char *&p,
                                  const char *end,
                                  MTLMaterial *material,
-                                 tex_map_XX &tex_map)
+                                 MTLTexMap &tex_map)
 {
   p = drop_whitespace(p, end);
   if (parse_keyword(p, end, "-o")) {
@@ -693,13 +688,13 @@ static void parse_texture_map(const char *p,
   if (!is_map && !is_refl && !is_bump) {
     return;
   }
-  eMTLSyntaxElement key = mtl_line_start_to_enum(p, end);
-  if (key == eMTLSyntaxElement::string || !material->texture_maps.contains(key)) {
+  MTLTexMapType key = mtl_line_start_to_texture_type(p, end);
+  if (key == MTLTexMapType::Count) {
     /* No supported texture map found. */
     std::cerr << "OBJ import: MTL texture map type not supported: '" << line << "'" << std::endl;
     return;
   }
-  tex_map_XX &tex_map = material->texture_maps.lookup(key);
+  MTLTexMap &tex_map = material->tex_map_of_type(key);
   tex_map.mtl_dir_path = mtl_dir_path;
 
   /* Parse texture map options. */
diff --git a/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc b/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc
index 4e6983bc0d5..7f7fda8d8f1 100644
--- a/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc
+++ b/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc
@@ -181,7 +181,7 @@ void MeshFromGeometry::create_polys_loops(Mesh *mesh, bool use_vertex_groups)
   const int64_t total_verts = mesh_geometry_.get_vertex_count();
   if (use_vertex_groups && total_verts && mesh_geometry_.has_vertex_groups_) {
     mesh->dvert = static_cast<MDeformVert *>(
-        CustomData_add_layer(&mesh->vdata, CD_MDEFORMVERT, CD_CALLOC, nullptr, total_verts));
+        CustomData_add_layer(&mesh->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, nullptr, total_verts));
   }
 
   bke::SpanAttributeWriter<int> material_indices =
@@ -268,7 +268,7 @@ void MeshFromGeometry::create_uv_verts(Mesh *mesh)
     return;
   }
   MLoopUV *mluv_dst = static_cast<MLoopUV *>(CustomData_add_layer(
-      &mesh->ldata, CD_MLOOPUV, CD_DEFAULT, nullptr, mesh_geometry_.total_loops_));
+      &mesh->ldata, CD_MLOOPUV, CD_SET_DEFAULT, nullptr, mesh_geometry_.total_loops_));
   int tot_loop_idx = 0;
 
   for (const PolyElem &curr_face : mesh_geometry_.face_elements_) {
diff --git a/source/blender/io/wavefront_obj/importer/obj_import_mtl.cc b/source/blender/io/wavefront_obj/importer/obj_import_mtl.cc
index 093cbec32fe..c28de14f2f7 100644
--- a/source/blender/io/wavefront_obj/importer/obj_import_mtl.cc
+++ b/source/blender/io/wavefront_obj/importer/obj_import_mtl.cc
@@ -17,8 +17,6 @@
 
 #include "NOD_shader.h"
 
-/* TODO: move eMTLSyntaxElement out of following file into a more neutral place */
-#include "obj_export_io.hh"
 #include "obj_import_mtl.hh"
 #include "obj_import_string_utils.hh"
 
@@ -29,12 +27,12 @@ namespace blender::io::obj {
  * Only float value(s) can be set using this method.
  */
 static void set_property_of_socket(eNodeSocketDatatype property_type,
-                                   StringRef socket_id,
+                                   const char *socket_id,
                                    Span<float> value,
                                    bNode *r_node)
 {
   BLI_assert(r_node);
-  bNodeSocket *socket{nodeFindSocket(r_node, SOCK_IN, socket_id.data())};
+  bNodeSocket *socket{nodeFindSocket(r_node, SOCK_IN, socket_id)};
   BLI_assert(socket && socket->type == property_type);
   switch (property_type) {
     case SOCK_FLOAT: {
@@ -95,7 +93,7 @@ static Image *create_placeholder_image(Main *bmain, const std::string &path)
   return image;
 }
 
-static Image *load_texture_image(Main *bmain, const tex_map_XX &tex_map, bool relative_paths)
+static Image *load_texture_image(Main *bmain, const MTLTexMap &tex_map, bool relative_paths)
 {
   Image *image = nullptr;
 
@@ -206,15 +204,15 @@ std::pair<float, float> ShaderNodetreeWrap::set_node_locations(const int pos_x)
 }
 
 void ShaderNodetreeWrap::link_sockets(bNode *from_node,
-                                      StringRef from_node_id,
+                                      const char *from_node_id,
                                       bNode *to_node,
-                                      StringRef to_node_id,
+                                      const char *to_node_id,
                                       const int from_node_pos_x)
 {
   std::tie(from_node->locx, from_node->locy) = set_node_locations(from_node_pos_x);
   std::tie(to_node->locx, to_node->locy) = set_node_locations(from_node_pos_x + 1);
-  bNodeSocket *from_sock{nodeFindSocket(from_node, SOCK_OUT, from_node_id.data())};
-  bNodeSocket *to_sock{nodeFindSocket(to_node, SOCK_IN, to_node_id.data())};
+  bNodeSocket *from_sock{nodeFindSocket(from_node, SOCK_OUT, from_node_id)};
+  bNodeSocket *to_sock{nodeFindSocket(to_node, SOCK_IN, to_node_id)};
   BLI_assert(from_sock && to_sock);
   nodeAddLink(nodetree_.get(), from_node, from_sock, to_node, to_sock);
 }
@@ -338,7 +336,7 @@ void ShaderNodetreeWrap::set_bsdf_socket_values(Material *mat)
   if (emission_color.x >= 0 && emission_color.y >= 0 && emission_color.z >= 0) {
     set_property_of_socket(SOCK_RGBA, "Emission", {emission_color, 3}, bsdf_);
   }
-  if (mtl_mat_.tex_map_of_type(eMTLSyntaxElement::map_Ke).is_valid()) {
+  if (mtl_mat_.tex_map_of_type(MTLTexMapType::Ke).is_valid()) {
     set_property_of_socket(SOCK_FLOAT, "Emission Strength", {1.0f}, bsdf_);
   }
   set_property_of_socket(SOCK_FLOAT, "Specular", {specular}, bsdf_);
@@ -359,38 +357,36 @@ void ShaderNodetreeWrap::set_bsdf_socket_values(Material *mat)
 
 void ShaderNodetreeWrap::add_image_textures(Main *bmain, Material *mat, bool relative_paths)
 {
-  for (const Map<const eMTLSyntaxElement, tex_map_XX>::Item texture_map :
-       mtl_mat_.texture_maps.items()) {
-    if (!texture_map.value.is_valid()) {
+  for (int key = 0; key < (int)MTLTexMapType::Count; ++key) {
+    const MTLTexMap &value = mtl_mat_.texture_maps[key];
+    if (!value.is_valid()) {
       /* No Image texture node of this map type can be added to this material. */
       continue;
     }
 
     bNode *image_texture = add_node_to_tree(SH_NODE_TEX_IMAGE);
     BLI_assert(image_texture);
-    Image *image = load_texture_image(bmain, texture_map.value, relative_paths);
+    Image *image = load_texture_image(bmain, value, relative_paths);
     if (image == nullptr) {
       continue;
     }
     image_texture->id = &image->id;
-    static_cast<NodeTexImage *>(image_texture->storage)->projection =
-        texture_map.value.projection_type;
+    static_cast<NodeTexImage *>(image_texture->storage)->projection = value.projection_type;
 
     /* Add normal map node if needed. */
     bNode *normal_map = nullptr;
-    if (texture_map.key == eMTLSyntaxElement::map_Bump) {
+    if (key == (int)MTLTexMapType::bump) {
       normal_map = add_node_to_tree(SH_NODE_NORMAL_MAP);
       const float bump = std::max(0.0f, mtl_mat_.map_Bump_strength);
       set_property_of_socket(SOCK_FLOAT, "Strength", {bump}, normal_map);
     }
 
     /* Add UV mapping & coordinate nodes only if needed. */
-    if (texture_map.value.translation != float3(0, 0, 0) ||
-        texture_map.value.scale != float3(1, 1, 1)) {
+    if (value.translation != float3(0, 0, 0) || value.scale != float3(1, 1, 1)) {
       bNode *mapping = add_node_to_tree(SH_NODE_MAPPING);
       bNode *texture_coordinate = add_node_to_tree(SH_NODE_TEX_COORD);
-      set_property_of_socket(SOCK_VECTOR, "Location", {texture_map.value.translation, 3}, mapping);
-      set_property_of_socket(SOCK_VECTOR, "Scale", {texture_map.value.scale, 3}, mapping);
+      set_property_of_socket(SOCK_VECTOR, "Location", {value.translation, 3}, mapping);
+      set_property_of_socket(SOCK_VECTOR, "Scale", {value.scale, 3}, mapping);
 
       link_sockets(texture_coordinate, "UV", mapping, "Vector", 0);
       link_sockets(mapping, "Vector", image_texture, "Vector", 1);
@@ -400,12 +396,12 @@ void ShaderNodetreeWrap::add_image_textures(Main *bmain, Material *mat, bool rel
       link_sockets(image_texture, "Color", normal_map, "Color", 2);
       link_sockets(normal_map, "Normal", bsdf_, "Normal", 3);
     }
-    else if (texture_map.key == eMTLSyntaxElement::map_d) {
-      link_sockets(image_texture, "Alpha", bsdf_, texture_map.value.dest_socket_id, 2);
+    else if (key == (int)MTLTexMapType::d) {
+      link_sockets(image_texture, "Alpha", bsdf_, tex_map_type_to_socket_id[key], 2);
       mat->blend_method = MA_BM_BLEND;
     }
     else {
-      link_sockets(image_texture, "Color", bsdf_, texture_map.value.dest_socket_id, 2);
+      link_sockets(image_texture, "Color", bsdf_, tex_map_type_to_socket_id[key], 2);
     }
   }
 }
diff --git a/source/blender/io/wavefront_obj/importer/obj_import_mtl.hh b/source/blender/io/wavefront_obj/importer/obj_import_mtl.hh
index 17dd0106fea..2c51d92a2cd 100644
--- a/source/blender/io/wavefront_obj/importer/obj_import_mtl.hh
+++ b/source/blender/io/wavefront_obj/importer/obj_import_mtl.hh
@@ -10,7 +10,6 @@
 
 #include "BLI_map.hh"
 #include "BLI_math_vec_types.hh"
-#include "BLI_string_ref.hh"
 #include "BLI_vector.hh"
 
 #include "DNA_node_types.h"
@@ -75,9 +74,9 @@ class ShaderNodetreeWrap {
    * \param from_node_pos_x: 0 to 4 value as per nodetree arrangement.
    */
   void link_sockets(bNode *from_node,
-                    StringRef from_node_id,
+                    const char *from_node_id,
                     bNode *to_node,
-                    StringRef to_node_id,
+                    const char *to_node_id,
                     const int from_node_pos_x);
   /**
    * Set values of sockets in p-BSDF node of the nodetree.
diff --git a/source/blender/io/wavefront_obj/tests/obj_exporter_tests.cc b/source/blender/io/wavefront_obj/tests/obj_exporter_tests.cc
index f582064e0c1..0fd711bdac6 100644
--- a/source/blender/io/wavefront_obj/tests/obj_exporter_tests.cc
+++ b/source/blender/io/wavefront_obj/tests/obj_exporter_tests.cc
@@ -185,17 +185,17 @@ TEST(obj_exporter_writer, mtllib)
 TEST(obj_exporter_writer, format_handler_buffer_chunking)
 {
   /* Use a tiny buffer chunk size, so that the test below ends up creating several blocks. */
-  FormatHandler<eFileType::OBJ, 16> h;
-  h.write<eOBJSyntaxElement::object_name>("abc");
-  h.write<eOBJSyntaxElement::object_name>("abcd");
-  h.write<eOBJSyntaxElement::object_name>("abcde");
-  h.write<eOBJSyntaxElement::object_name>("abcdef");
-  h.write<eOBJSyntaxElement::object_name>("012345678901234567890123456789abcd");
-  h.write<eOBJSyntaxElement::object_name>("123");
-  h.write<eOBJSyntaxElement::curve_element_begin>();
-  h.write<eOBJSyntaxElement::new_line>();
-  h.write<eOBJSyntaxElement::nurbs_parameter_begin>();
-  h.write<eOBJSyntaxElement::new_line>();
+  FormatHandler h(16);
+  h.write_obj_object("abc");
+  h.write_obj_object("abcd");
+  h.write_obj_object("abcde");
+  h.write_obj_object("abcdef");
+  h.write_obj_object("012345678901234567890123456789abcd");
+  h.write_obj_object("123");
+  h.write_obj_curve_begin();
+  h.write_obj_newline();
+  h.write_obj_nurbs_parm_begin();
+  h.write_obj_newline();
 
   size_t got_blocks = h.get_block_count();
   ASSERT_EQ(got_blocks, 7);
diff --git a/source/blender/io/wavefront_obj/tests/obj_importer_tests.cc b/source/blender/io/wavefront_obj/tests/obj_importer_tests.cc
index bd9360548af..35f977f41df 100644
--- a/source/blender/io/wavefront_obj/tests/obj_importer_tests.cc
+++ b/source/blender/io/wavefront_obj/tests/obj_importer_tests.cc
@@ -12,7 +12,7 @@
 #include "BKE_scene.h"
 
 #include "BLI_listbase.h"
-#include "BLI_math_base.h"
+#include "BLI_math_base.hh"
 #include "BLI_math_vec_types.hh"
 
 #include "BLO_readfile.h"
diff --git a/source/blender/io/wavefront_obj/tests/obj_mtl_parser_tests.cc b/source/blender/io/wavefront_obj/tests/obj_mtl_parser_tests.cc
index 08050ac34c9..41faba95b30 100644
--- a/source/blender/io/wavefront_obj/tests/obj_mtl_parser_tests.cc
+++ b/source/blender/io/wavefront_obj/tests/obj_mtl_parser_tests.cc
@@ -58,9 +58,9 @@ class obj_mtl_parser_test : public testing::Test {
       EXPECT_NEAR(exp.d, got.d, tol);
       EXPECT_NEAR(exp.map_Bump_strength, got.map_Bump_strength, tol);
       EXPECT_EQ(exp.illum, got.illum);
-      for (const auto &it : exp.texture_maps.items()) {
-        const tex_map_XX &exp_tex = it.value;
-        const tex_map_XX &got_tex = got.texture_maps.lookup(it.key);
+      for (int key = 0; key < (int)MTLTexMapType::Count; key++) {
+        const MTLTexMap &exp_tex = exp.texture_maps[key];
+        const MTLTexMap &got_tex = got.texture_maps[key];
         EXPECT_STREQ(exp_tex.image_path.c_str(), got_tex.image_path.c_str());
         EXPECT_V3_NEAR(exp_tex.translation, got_tex.translation, tol);
         EXPECT_V3_NEAR(exp_tex.scale, got_tex.scale, tol);
@@ -113,8 +113,8 @@ TEST_F(obj_mtl_parser_test, string_newlines_whitespace)
   mat[4].Kd = {0.6f, 0.7f, 0.8f};
   mat[5].name = "crlf_ending";
   mat[5].Ns = 5.0f;
-  mat[5].tex_map_of_type(eMTLSyntaxElement::map_Kd).image_path = "sometex_d.png";
-  mat[5].tex_map_of_type(eMTLSyntaxElement::map_Ks).image_path = "sometex_s_spaces_after_name.png";
+  mat[5].tex_map_of_type(MTLTexMapType::Kd).image_path = "sometex_d.png";
+  mat[5].tex_map_of_type(MTLTexMapType::Ks).image_path = "sometex_s_spaces_after_name.png";
   check_string(text, mat, ARRAY_SIZE(mat));
 }
 
@@ -175,13 +175,13 @@ TEST_F(obj_mtl_parser_test, materials)
   mat[1].illum = 2;
   mat[1].map_Bump_strength = 1;
   {
-    tex_map_XX &kd = mat[1].tex_map_of_type(eMTLSyntaxElement::map_Kd);
+    MTLTexMap &kd = mat[1].tex_map_of_type(MTLTexMapType::Kd);
     kd.image_path = "texture.png";
-    tex_map_XX &ns = mat[1].tex_map_of_type(eMTLSyntaxElement::map_Ns);
+    MTLTexMap &ns = mat[1].tex_map_of_type(MTLTexMapType::Ns);
     ns.image_path = "sometexture_Roughness.png";
-    tex_map_XX &refl = mat[1].tex_map_of_type(eMTLSyntaxElement::map_refl);
+    MTLTexMap &refl = mat[1].tex_map_of_type(MTLTexMapType::refl);
     refl.image_path = "sometexture_Metallic.png";
-    tex_map_XX &bump = mat[1].tex_map_of_type(eMTLSyntaxElement::map_Bump);
+    MTLTexMap &bump = mat[1].tex_map_of_type(MTLTexMapType::bump);
     bump.image_path = "sometexture_Normal.png";
   }
 
@@ -202,13 +202,13 @@ TEST_F(obj_mtl_parser_test, materials)
   mat[3].Ns = 800;
   mat[3].map_Bump_strength = 0.5f;
   {
-    tex_map_XX &kd = mat[3].tex_map_of_type(eMTLSyntaxElement::map_Kd);
+    MTLTexMap &kd = mat[3].tex_map_of_type(MTLTexMapType::Kd);
     kd.image_path = "someHatTexture_BaseColor.jpg";
-    tex_map_XX &ns = mat[3].tex_map_of_type(eMTLSyntaxElement::map_Ns);
+    MTLTexMap &ns = mat[3].tex_map_of_type(MTLTexMapType::Ns);
     ns.image_path = "someHatTexture_Roughness.jpg";
-    tex_map_XX &refl = mat[3].tex_map_of_type(eMTLSyntaxElement::map_refl);
+    MTLTexMap &refl = mat[3].tex_map_of_type(MTLTexMapType::refl);
     refl.image_path = "someHatTexture_Metalness.jpg";
-    tex_map_XX &bump = mat[3].tex_map_of_type(eMTLSyntaxElement::map_Bump);
+    MTLTexMap &bump = mat[3].tex_map_of_type(MTLTexMapType::bump);
     bump.image_path = "someHatTexture_Normal.jpg";
   }
 
@@ -222,30 +222,30 @@ TEST_F(obj_mtl_parser_test, materials)
   mat[4].d = 0.5;
   mat[4].map_Bump_strength = 0.1f;
   {
-    tex_map_XX &kd = mat[4].tex_map_of_type(eMTLSyntaxElement::map_Kd);
+    MTLTexMap &kd = mat[4].tex_map_of_type(MTLTexMapType::Kd);
     kd.image_path = "sometex_d.png";
-    tex_map_XX &ns = mat[4].tex_map_of_type(eMTLSyntaxElement::map_Ns);
+    MTLTexMap &ns = mat[4].tex_map_of_type(MTLTexMapType::Ns);
     ns.image_path = "sometex_ns.psd";
-    tex_map_XX &refl = mat[4].tex_map_of_type(eMTLSyntaxElement::map_refl);
+    MTLTexMap &refl = mat[4].tex_map_of_type(MTLTexMapType::refl);
     refl.image_path = "clouds.tiff";
     refl.scale = {1.5f, 2.5f, 3.5f};
     refl.translation = {4.5f, 5.5f, 6.5f};
     refl.projection_type = SHD_PROJ_SPHERE;
-    tex_map_XX &bump = mat[4].tex_map_of_type(eMTLSyntaxElement::map_Bump);
+    MTLTexMap &bump = mat[4].tex_map_of_type(MTLTexMapType::bump);
     bump.image_path = "somebump.tga";
     bump.scale = {3, 4, 5};
   }
 
   mat[5].name = "Parser_ScaleOffset_Test";
   {
-    tex_map_XX &kd = mat[5].tex_map_of_type(eMTLSyntaxElement::map_Kd);
+    MTLTexMap &kd = mat[5].tex_map_of_type(MTLTexMapType::Kd);
     kd.translation = {2.5f, 0.0f, 0.0f};
     kd.image_path = "OffsetOneValue.png";
-    tex_map_XX &ks = mat[5].tex_map_of_type(eMTLSyntaxElement::map_Ks);
+    MTLTexMap &ks = mat[5].tex_map_of_type(MTLTexMapType::Ks);
     ks.scale = {1.5f, 2.5f, 1.0f};
     ks.translation = {3.5f, 4.5f, 0.0f};
     ks.image_path = "ScaleOffsetBothTwovalues.png";
-    tex_map_XX &ns = mat[5].tex_map_of_type(eMTLSyntaxElement::map_Ns);
+    MTLTexMap &ns = mat[5].tex_map_of_type(MTLTexMapType::Ns);
     ns.scale = {0.5f, 1.0f, 1.0f};
     ns.image_path = "1.Value.png";
   }
diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index 3477105f519..92cc35908f2 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -12,8 +12,33 @@
 #include "DNA_scene_types.h" /* for #ImageFormatData */
 #include "DNA_vec_types.h"   /* for #rctf */
 
+/** Workaround to forward-declare C++ type in C header. */
 #ifdef __cplusplus
-extern "C" {
+namespace blender {
+template<typename T> class Span;
+class StringRef;
+class StringRefNull;
+}  // namespace blender
+namespace blender::nodes {
+class NodeDeclaration;
+class SocketDeclaration;
+}  // namespace blender::nodes
+namespace blender::bke {
+class bNodeTreeRuntime;
+class bNodeRuntime;
+class bNodeSocketRuntime;
+}  // namespace blender::bke
+using NodeDeclarationHandle = blender::nodes::NodeDeclaration;
+using SocketDeclarationHandle = blender::nodes::SocketDeclaration;
+using bNodeTreeRuntimeHandle = blender::bke::bNodeTreeRuntime;
+using bNodeRuntimeHandle = blender::bke::bNodeRuntime;
+using bNodeSocketRuntimeHandle = blender::bke::bNodeSocketRuntime;
+#else
+typedef struct NodeDeclarationHandle NodeDeclarationHandle;
+typedef struct SocketDeclarationHandle SocketDeclarationHandle;
+typedef struct bNodeTreeRuntimeHandle bNodeTreeRuntimeHandle;
+typedef struct bNodeRuntimeHandle bNodeRuntimeHandle;
+typedef struct bNodeSocketRuntimeHandle bNodeSocketRuntimeHandle;
 #endif
 
 struct AnimData;
@@ -30,6 +55,7 @@ struct bNodeLink;
 struct bNodePreview;
 struct bNodeTreeExec;
 struct bNodeType;
+struct bNode;
 struct uiBlock;
 
 #define NODE_MAXSTR 64
@@ -65,30 +91,6 @@ typedef struct bNodeStack {
 #define NS_CR_FIT 4
 #define NS_CR_STRETCH 5
 
-/** Workaround to forward-declare C++ type in C header. */
-#ifdef __cplusplus
-namespace blender::nodes {
-class NodeDeclaration;
-class SocketDeclaration;
-}  // namespace blender::nodes
-namespace blender::bke {
-class bNodeTreeRuntime;
-class bNodeRuntime;
-class bNodeSocketRuntime;
-}  // namespace blender::bke
-using NodeDeclarationHandle = blender::nodes::NodeDeclaration;
-using SocketDeclarationHandle = blender::nodes::SocketDeclaration;
-using bNodeTreeRuntimeHandle = blender::bke::bNodeTreeRuntime;
-using bNodeRuntimeHandle = blender::bke::bNodeRuntime;
-using bNodeSocketRuntimeHandle = blender::bke::bNodeSocketRuntime;
-#else
-typedef struct NodeDeclarationHandle NodeDeclarationHandle;
-typedef struct SocketDeclarationHandle SocketDeclarationHandle;
-typedef struct bNodeTreeRuntimeHandle bNodeTreeRuntimeHandle;
-typedef struct bNodeRuntimeHandle bNodeRuntimeHandle;
-typedef struct bNodeSocketRuntimeHandle bNodeSocketRuntimeHandle;
-#endif
-
 typedef struct bNodeSocket {
   struct bNodeSocket *next, *prev;
 
@@ -181,6 +183,49 @@ typedef struct bNodeSocket {
   bNodeStack ns DNA_DEPRECATED;
 
   bNodeSocketRuntimeHandle *runtime;
+
+#ifdef __cplusplus
+  bool is_available() const;
+  bool is_multi_input() const;
+  bool is_input() const;
+  bool is_output() const;
+
+  /** Utility to access the value of the socket. */
+  template<typename T> const T *default_value_typed() const;
+
+  /* The following methods are only available when #bNodeTree.ensure_topology_cache has been
+   * called. */
+
+  /** Zero based index for every input and output socket. */
+  int index() const;
+  /** Socket index in the entire node tree. Inputs and outputs share the same index space. */
+  int index_in_tree() const;
+  /** Node this socket belongs to. */
+  bNode &owner_node();
+  const bNode &owner_node() const;
+  /** Node tree this socket belongs to. */
+  const bNodeTree &owner_tree() const;
+
+  /** Links which are incident to this socket. */
+  blender::Span<bNodeLink *> directly_linked_links();
+  blender::Span<const bNodeLink *> directly_linked_links() const;
+  /** Sockets which are connected to this socket with a link. */
+  blender::Span<const bNodeSocket *> directly_linked_sockets() const;
+  bool is_directly_linked() const;
+  /**
+   * Sockets which are connected to this socket when reroutes and muted nodes are taken into
+   * account.
+   */
+  blender::Span<const bNodeSocket *> logically_linked_sockets() const;
+  bool is_logically_linked() const;
+
+  /**
+   * For output sockets, this is the corresponding input socket the value of which should be
+   * forwarded when the node is muted.
+   */
+  const bNodeSocket *internal_link_input() const;
+
+#endif
 } bNodeSocket;
 
 /** #bNodeSocket.type & #bNodeSocketType.type */
@@ -333,6 +378,38 @@ typedef struct bNode {
   char iter_flag;
 
   bNodeRuntimeHandle *runtime;
+
+#ifdef __cplusplus
+  blender::StringRefNull label_or_name() const;
+  bool is_muted() const;
+  bool is_reroute() const;
+  bool is_frame() const;
+  bool is_group() const;
+  bool is_group_input() const;
+  bool is_group_output() const;
+  const blender::nodes::NodeDeclaration *declaration() const;
+
+  /* The following methods are only available when #bNodeTree.ensure_topology_cache has been
+   * called. */
+
+  /** A span containing all input sockets of the node (including unavailable sockets). */
+  blender::Span<bNodeSocket *> input_sockets();
+  blender::Span<const bNodeSocket *> input_sockets() const;
+  /** A span containing all output sockets of the node (including unavailable sockets). */
+  blender::Span<bNodeSocket *> output_sockets();
+  blender::Span<const bNodeSocket *> output_sockets() const;
+  /** Utility to get an input socket by its index. */
+  bNodeSocket &input_socket(int index);
+  const bNodeSocket &input_socket(int index) const;
+  /** Utility to get an output socket by its index. */
+  bNodeSocket &output_socket(int index);
+  const bNodeSocket &output_socket(int index) const;
+  /** A span containing all internal links when the node is muted. */
+  blender::Span<const bNodeLink *> internal_links_span() const;
+  /** Lookup socket of this node by its identifier. */
+  const bNodeSocket &input_by_identifier(blender::StringRef identifier) const;
+  const bNodeSocket &output_by_identifier(blender::StringRef identifier) const;
+#endif
 } bNode;
 
 /* node->flag */
@@ -422,6 +499,11 @@ typedef struct bNodeLink {
 
   int flag;
   int multi_input_socket_index;
+
+#ifdef __cplusplus
+  bool is_muted() const;
+#endif
+
 } bNodeLink;
 
 /* link->flag */
@@ -535,6 +617,50 @@ typedef struct bNodeTree {
   struct PreviewImage *preview;
 
   bNodeTreeRuntimeHandle *runtime;
+
+#ifdef __cplusplus
+  /**
+   * Update a run-time cache for the node tree based on it's current state. This makes many methods
+   * available which allow efficient lookup for topology information (like neighboring sockets).
+   */
+  void ensure_topology_cache() const;
+
+  /* The following methods are only available when #bNodeTree.ensure_topology_cache has been
+   * called. */
+
+  /** A span containing all nodes in the node tree. */
+  blender::Span<bNode *> all_nodes();
+  blender::Span<const bNode *> all_nodes() const;
+  /** A span containing all input sockets in the node tree. */
+  blender::Span<bNodeSocket *> all_input_sockets();
+  blender::Span<const bNodeSocket *> all_input_sockets() const;
+  /** A span containing all output sockets in the node tree. */
+  blender::Span<bNodeSocket *> all_output_sockets();
+  blender::Span<const bNodeSocket *> all_output_sockets() const;
+  /** A span containing all sockets in the node tree. */
+  blender::Span<bNodeSocket *> all_sockets();
+  blender::Span<const bNodeSocket *> all_sockets() const;
+  /** Efficient lookup of all nodes with a specific type. */
+  blender::Span<bNode *> nodes_by_type(blender::StringRefNull type_idname);
+  blender::Span<const bNode *> nodes_by_type(blender::StringRefNull type_idname) const;
+  /**
+   * Cached toposort of all nodes. If there are cycles, the returned array is not actually a
+   * toposort. However, if a connected component does not contain a cycle, this component is sorted
+   * correctly. Use #has_link_cycle to check for cycles.
+   */
+  blender::Span<const bNode *> toposort_left_to_right() const;
+  blender::Span<const bNode *> toposort_right_to_left() const;
+  /** True when there are any cycles in the node tree. */
+  bool has_link_cycle() const;
+  /**
+   * True when there are nodes or sockets in the node tree that don't use a known type. This can
+   * happen when nodes don't exist in the current Blender version that existed in the version where
+   * this node tree was saved.
+   */
+  bool has_undefined_nodes_or_sockets() const;
+  /** Get the active group output node. */
+  const bNode *group_output_node() const;
+#endif
 } bNodeTree;
 
 /** #NodeTree.type, index */
@@ -1475,6 +1601,17 @@ typedef struct NodeCombSepColor {
   int8_t mode;
 } NodeCombSepColor;
 
+typedef struct NodeShaderMix {
+  /* eNodeSocketDatatype */
+  int8_t data_type;
+  /* NodeShaderMixMode */
+  int8_t factor_mode;
+  int8_t clamp_factor;
+  int8_t clamp_result;
+  int8_t blend_type;
+  char _pad[3];
+} NodeShaderMix;
+
 /* script node mode */
 #define NODE_SCRIPT_INTERNAL 0
 #define NODE_SCRIPT_EXTERNAL 1
@@ -1762,6 +1899,11 @@ typedef enum NodeBooleanMathOperation {
   NODE_BOOLEAN_MATH_NIMPLY = 8,
 } NodeBooleanMathOperation;
 
+typedef enum NodeShaderMixMode {
+  NODE_MIX_MODE_UNIFORM = 0,
+  NODE_MIX_MODE_NON_UNIFORM = 1,
+} NodeShaderMixMode;
+
 typedef enum NodeCompareMode {
   NODE_COMPARE_MODE_ELEMENT = 0,
   NODE_COMPARE_MODE_LENGTH = 1,
@@ -2194,7 +2336,3 @@ typedef enum NodeCombSepColorMode {
   NODE_COMBSEP_COLOR_HSV = 1,
   NODE_COMBSEP_COLOR_HSL = 2,
 } NodeCombSepColorMode;
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/source/blender/makesdna/intern/makesdna.c b/source/blender/makesdna/intern/makesdna.c
index 806513009be..36abe970b31 100644
--- a/source/blender/makesdna/intern/makesdna.c
+++ b/source/blender/makesdna/intern/makesdna.c
@@ -506,6 +506,54 @@ static short *add_struct(int namecode)
   return sp;
 }
 
+/* Copied from `BLI_str_startswith` string.c
+ * to avoid complicating the compilation process of makesdna. */
+static bool str_startswith(const char *__restrict str, const char *__restrict start)
+{
+  for (; *str && *start; str++, start++) {
+    if (*str != *start) {
+      return false;
+    }
+  }
+
+  return (*start == '\0');
+}
+
+/**
+ * Check if `str` is a preprocessor string that starts with `start`.
+ * The `start` doesn't need the `#` prefix.
+ * `ifdef VALUE` will match `#ifdef VALUE` as well as `#  ifdef VALUE`.
+ */
+static bool match_preproc_prefix(const char *__restrict str, const char *__restrict start)
+{
+  if (*str != '#') {
+    return false;
+  }
+  str++;
+  while (*str == ' ') {
+    str++;
+  }
+  return str_startswith(str, start);
+}
+
+/**
+ * \return The point in `str` that starts with `start` or NULL when not found.
+ *
+ */
+static char *match_preproc_strstr(char *__restrict str, const char *__restrict start)
+{
+  while ((str = strchr(str, '#'))) {
+    str++;
+    while (*str == ' ') {
+      str++;
+    }
+    if (str_startswith(str, start)) {
+      return str;
+    }
+  }
+  return NULL;
+}
+
 static int preprocess_include(char *maindata, const int maindata_len)
 {
   /* NOTE: len + 1, last character is a dummy to prevent
@@ -533,6 +581,10 @@ static int preprocess_include(char *maindata, const int maindata_len)
     cp++;
   }
 
+  /* No need for leading '#' character. */
+  const char *cpp_block_start = "ifdef __cplusplus";
+  const char *cpp_block_end = "endif";
+
   /* data from temp copy to maindata, remove comments and double spaces */
   cp = temp;
   char *md = maindata;
@@ -577,6 +629,18 @@ static int preprocess_include(char *maindata, const int maindata_len)
         skip_until_closing_brace = false;
       }
     }
+    else if (match_preproc_prefix(cp, cpp_block_start)) {
+      char *end_ptr = match_preproc_strstr(cp, cpp_block_end);
+
+      if (end_ptr == NULL) {
+        fprintf(stderr, "Error: '%s' block must end with '%s'\n", cpp_block_start, cpp_block_end);
+      }
+      else {
+        const int skip_offset = end_ptr - cp + strlen(cpp_block_end);
+        a -= skip_offset;
+        cp += skip_offset;
+      }
+    }
     else {
       md[0] = cp[0];
       md++;
diff --git a/source/blender/makesrna/intern/rna_mesh.c b/source/blender/makesrna/intern/rna_mesh.c
index 6f1e3c55dbd..6979b65cfc9 100644
--- a/source/blender/makesrna/intern/rna_mesh.c
+++ b/source/blender/makesrna/intern/rna_mesh.c
@@ -422,7 +422,7 @@ static void rna_MeshVertex_hide_set(PointerRNA *ptr, bool value)
       return;
     }
     hide_vert = (bool *)CustomData_add_layer_named(
-        &mesh->vdata, CD_PROP_BOOL, CD_CALLOC, NULL, mesh->totvert, ".hide_vert");
+        &mesh->vdata, CD_PROP_BOOL, CD_SET_DEFAULT, NULL, mesh->totvert, ".hide_vert");
   }
   const int index = rna_MeshVertex_index_get(ptr);
   hide_vert[index] = value;
@@ -556,7 +556,7 @@ static void rna_MeshPolygon_hide_set(PointerRNA *ptr, bool value)
       return;
     }
     hide_poly = (bool *)CustomData_add_layer_named(
-        &mesh->pdata, CD_PROP_BOOL, CD_CALLOC, NULL, mesh->totpoly, ".hide_poly");
+        &mesh->pdata, CD_PROP_BOOL, CD_SET_DEFAULT, NULL, mesh->totpoly, ".hide_poly");
   }
   const int index = rna_MeshPolygon_index_get(ptr);
   hide_poly[index] = value;
@@ -798,7 +798,7 @@ static void rna_MEdge_freestyle_edge_mark_set(PointerRNA *ptr, bool value)
   FreestyleEdge *fed = CustomData_get(&me->edata, index, CD_FREESTYLE_EDGE);
 
   if (!fed) {
-    fed = CustomData_add_layer(&me->edata, CD_FREESTYLE_EDGE, CD_CALLOC, NULL, me->totedge);
+    fed = CustomData_add_layer(&me->edata, CD_FREESTYLE_EDGE, CD_SET_DEFAULT, NULL, me->totedge);
   }
   if (value) {
     fed->flag |= FREESTYLE_EDGE_MARK;
@@ -824,7 +824,7 @@ static void rna_MPoly_freestyle_face_mark_set(PointerRNA *ptr, bool value)
   FreestyleFace *ffa = CustomData_get(&me->pdata, index, CD_FREESTYLE_FACE);
 
   if (!ffa) {
-    ffa = CustomData_add_layer(&me->pdata, CD_FREESTYLE_FACE, CD_CALLOC, NULL, me->totpoly);
+    ffa = CustomData_add_layer(&me->pdata, CD_FREESTYLE_FACE, CD_SET_DEFAULT, NULL, me->totpoly);
   }
   if (value) {
     ffa->flag |= FREESTYLE_FACE_MARK;
@@ -1307,7 +1307,7 @@ static void rna_MeshEdge_hide_set(PointerRNA *ptr, bool value)
       return;
     }
     hide_edge = (bool *)CustomData_add_layer_named(
-        &mesh->edata, CD_PROP_BOOL, CD_CALLOC, NULL, mesh->totedge, ".hide_edge");
+        &mesh->edata, CD_PROP_BOOL, CD_SET_DEFAULT, NULL, mesh->totedge, ".hide_edge");
   }
   const int index = rna_MeshEdge_index_get(ptr);
   hide_edge[index] = value;
@@ -1751,7 +1751,8 @@ static void rna_Mesh_sculpt_vertex_color_remove(struct Mesh *me,
       CustomDataLayer *cdl = NULL; \
       int index; \
 \
-      CustomData_add_layer_named(&me->cdata, cd_prop_type, CD_DEFAULT, NULL, me->countvar, name); \
+      CustomData_add_layer_named( \
+          &me->cdata, cd_prop_type, CD_SET_DEFAULT, NULL, me->countvar, name); \
       index = CustomData_get_named_layer_index(&me->cdata, cd_prop_type, name); \
 \
       cdl = (index == -1) ? NULL : &(me->cdata.layers[index]); \
diff --git a/source/blender/makesrna/intern/rna_mesh_api.c b/source/blender/makesrna/intern/rna_mesh_api.c
index 8447074a3ef..41b0d0b0bfd 100644
--- a/source/blender/makesrna/intern/rna_mesh_api.c
+++ b/source/blender/makesrna/intern/rna_mesh_api.c
@@ -44,7 +44,7 @@ static const char *rna_Mesh_unit_test_compare(struct Mesh *mesh,
 static void rna_Mesh_create_normals_split(Mesh *mesh)
 {
   if (!CustomData_has_layer(&mesh->ldata, CD_NORMAL)) {
-    CustomData_add_layer(&mesh->ldata, CD_NORMAL, CD_CALLOC, NULL, mesh->totloop);
+    CustomData_add_layer(&mesh->ldata, CD_NORMAL, CD_SET_DEFAULT, NULL, mesh->totloop);
     CustomData_set_layer_flag(&mesh->ldata, CD_NORMAL, CD_FLAG_TEMPORARY);
   }
 }
@@ -64,7 +64,7 @@ static void rna_Mesh_calc_tangents(Mesh *mesh, ReportList *reports, const char *
   }
   else {
     r_looptangents = CustomData_add_layer(
-        &mesh->ldata, CD_MLOOPTANGENT, CD_CALLOC, NULL, mesh->totloop);
+        &mesh->ldata, CD_MLOOPTANGENT, CD_SET_DEFAULT, NULL, mesh->totloop);
     CustomData_set_layer_flag(&mesh->ldata, CD_MLOOPTANGENT, CD_FLAG_TEMPORARY);
   }
 
diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index 1573a1df002..6596acfaf57 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -4927,6 +4927,54 @@ static void def_compare(StructRNA *srna)
   RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
 }
 
+static void def_sh_mix(StructRNA *srna)
+{
+  static const EnumPropertyItem rna_enum_mix_data_type_items[] = {
+      {SOCK_FLOAT, "FLOAT", 0, "Float", ""},
+      {SOCK_VECTOR, "VECTOR", 0, "Vector", ""},
+      {SOCK_RGBA, "RGBA", 0, "Color", ""},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  static const EnumPropertyItem rna_enum_mix_mode_items[] = {
+      {NODE_MIX_MODE_UNIFORM, "UNIFORM", 0, "Uniform", "Use a single factor for all components"},
+      {NODE_MIX_MODE_NON_UNIFORM, "NON_UNIFORM", 0, "Non-Uniform", "Per component factor"},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  PropertyRNA *prop;
+
+  RNA_def_struct_sdna_from(srna, "NodeShaderMix", "storage");
+
+  prop = RNA_def_property(srna, "data_type", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, rna_enum_mix_data_type_items);
+  RNA_def_property_enum_default(prop, SOCK_FLOAT);
+  RNA_def_property_ui_text(prop, "Data Type", "");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
+
+  prop = RNA_def_property(srna, "factor_mode", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, rna_enum_mix_mode_items);
+  RNA_def_property_enum_default(prop, SOCK_FLOAT);
+  RNA_def_property_ui_text(prop, "Factor Mode", "");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_socket_update");
+
+  prop = RNA_def_property(srna, "blend_type", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_sdna(prop, NULL, "blend_type");
+  RNA_def_property_enum_items(prop, rna_enum_ramp_blend_items);
+  RNA_def_property_ui_text(prop, "Blending Mode", "");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
+
+  prop = RNA_def_property(srna, "clamp_factor", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "clamp_factor", 1);
+  RNA_def_property_ui_text(prop, "Clamp Factor", "Clamp the factor to [0,1] range");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
+
+  prop = RNA_def_property(srna, "clamp_result", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "clamp_result", 1);
+  RNA_def_property_ui_text(prop, "Clamp Result", "Clamp the result to [0,1] range");
+  RNA_def_property_update(prop, NC_NODE | NA_EDITED, "rna_Node_update");
+}
+
 static void def_float_to_int(StructRNA *srna)
 {
   PropertyRNA *prop;
@@ -10964,6 +11012,11 @@ static void rna_def_node_socket(BlenderRNA *brna)
   RNA_def_property_clear_flag(prop, PROP_EDITABLE);
   RNA_def_property_ui_text(prop, "Linked", "True if the socket is connected");
 
+  prop = RNA_def_property(srna, "is_unavailable", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "flag", SOCK_UNAVAIL);
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+  RNA_def_property_ui_text(prop, "Unavailable", "True if the socket is unavailable");
+
   prop = RNA_def_property(srna, "is_multi_input", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "flag", SOCK_MULTI_INPUT);
   RNA_def_property_clear_flag(prop, PROP_EDITABLE);
diff --git a/source/blender/modifiers/intern/MOD_cloth.c b/source/blender/modifiers/intern/MOD_cloth.c
index 6c5baabe756..8f4a675b797 100644
--- a/source/blender/modifiers/intern/MOD_cloth.c
+++ b/source/blender/modifiers/intern/MOD_cloth.c
@@ -115,7 +115,7 @@ static void deformVerts(ModifierData *md,
       float(*layerorco)[3];
       if (!(layerorco = CustomData_get_layer(&mesh_src->vdata, CD_CLOTH_ORCO))) {
         layerorco = CustomData_add_layer(
-            &mesh_src->vdata, CD_CLOTH_ORCO, CD_CALLOC, NULL, mesh_src->totvert);
+            &mesh_src->vdata, CD_CLOTH_ORCO, CD_SET_DEFAULT, NULL, mesh_src->totvert);
       }
 
       memcpy(layerorco, kb->data, sizeof(float[3]) * verts_num);
diff --git a/source/blender/modifiers/intern/MOD_nodes.cc b/source/blender/modifiers/intern/MOD_nodes.cc
index d3b43176700..2908fbf5597 100644
--- a/source/blender/modifiers/intern/MOD_nodes.cc
+++ b/source/blender/modifiers/intern/MOD_nodes.cc
@@ -297,6 +297,7 @@ static void updateDepsgraph(ModifierData *md, const ModifierUpdateDepsgraphConte
       case ID_IM:
       case ID_TE: {
         DEG_add_generic_id_relation(ctx->node, id, "Nodes Modifier");
+        break;
       }
       default: {
         /* Purposefully don't add relations for materials. While there are material sockets,
@@ -755,18 +756,18 @@ void MOD_nodes_update_interface(Object *object, NodesModifierData *nmd)
 }
 
 static void initialize_group_input(NodesModifierData &nmd,
-                                   const OutputSocketRef &socket,
+                                   const bNodeSocket &socket,
                                    void *r_value)
 {
-  const bNodeSocketType &socket_type = *socket.typeinfo();
-  const bNodeSocket &bsocket = *socket.bsocket();
+  const bNodeSocketType &socket_type = *socket.typeinfo;
+  const bNodeSocket &bsocket = socket;
   const eNodeSocketDatatype socket_data_type = static_cast<eNodeSocketDatatype>(bsocket.type);
   if (nmd.settings.properties == nullptr) {
     socket_type.get_geometry_nodes_cpp_value(bsocket, r_value);
     return;
   }
   const IDProperty *property = IDP_GetPropertyFromGroup(nmd.settings.properties,
-                                                        socket.identifier().c_str());
+                                                        socket.identifier);
   if (property == nullptr) {
     socket_type.get_geometry_nodes_cpp_value(bsocket, r_value);
     return;
@@ -776,15 +777,15 @@ static void initialize_group_input(NodesModifierData &nmd,
     return;
   }
 
-  if (!input_has_attribute_toggle(*nmd.node_group, socket.index())) {
+  if (!input_has_attribute_toggle(*nmd.node_group, socket.runtime->index_in_node)) {
     init_socket_cpp_value_from_property(*property, socket_data_type, r_value);
     return;
   }
 
   const IDProperty *property_use_attribute = IDP_GetPropertyFromGroup(
-      nmd.settings.properties, (socket.identifier() + use_attribute_suffix).c_str());
+      nmd.settings.properties, (socket.identifier + use_attribute_suffix).c_str());
   const IDProperty *property_attribute_name = IDP_GetPropertyFromGroup(
-      nmd.settings.properties, (socket.identifier() + attribute_name_suffix).c_str());
+      nmd.settings.properties, (socket.identifier + attribute_name_suffix).c_str());
   if (property_use_attribute == nullptr || property_attribute_name == nullptr) {
     init_socket_cpp_value_from_property(*property, socket_data_type, r_value);
     return;
@@ -866,11 +867,11 @@ static void find_sockets_to_preview_for_spreadsheet(SpaceSpreadsheet *sspreadshe
 
   const DTreeContext *context = &tree.root_context();
   for (SpreadsheetContextNode *node_context : nested_group_contexts) {
-    const NodeTreeRef &tree_ref = context->tree();
-    const NodeRef *found_node = nullptr;
-    for (const NodeRef *node_ref : tree_ref.nodes()) {
-      if (node_ref->name() == node_context->node_name) {
-        found_node = node_ref;
+    const bNodeTree &btree = context->btree();
+    const bNode *found_node = nullptr;
+    for (const bNode *bnode : btree.all_nodes()) {
+      if (STREQ(bnode->name, node_context->node_name)) {
+        found_node = bnode;
         break;
       }
     }
@@ -883,11 +884,11 @@ static void find_sockets_to_preview_for_spreadsheet(SpaceSpreadsheet *sspreadshe
     }
   }
 
-  const NodeTreeRef &tree_ref = context->tree();
-  for (const NodeRef *node_ref : tree_ref.nodes_by_type("GeometryNodeViewer")) {
-    if (node_ref->name() == last_context->node_name) {
-      const DNode viewer_node{context, node_ref};
-      for (const InputSocketRef *input_socket : node_ref->inputs()) {
+  const bNodeTree &btree = context->btree();
+  for (const bNode *bnode : btree.nodes_by_type("GeometryNodeViewer")) {
+    if (STREQ(bnode->name, last_context->node_name)) {
+      const DNode viewer_node{context, bnode};
+      for (const bNodeSocket *input_socket : bnode->input_sockets()) {
         if (input_socket->is_available() && input_socket->is_logically_linked()) {
           r_sockets_to_preview.add(DSocket{context, input_socket});
         }
@@ -936,15 +937,15 @@ struct OutputAttributeToStore {
  * can be evaluated together.
  */
 static MultiValueMap<eAttrDomain, OutputAttributeInfo> find_output_attributes_to_store(
-    const NodesModifierData &nmd, const NodeRef &output_node, Span<GMutablePointer> output_values)
+    const NodesModifierData &nmd, const bNode &output_node, Span<GMutablePointer> output_values)
 {
   MultiValueMap<eAttrDomain, OutputAttributeInfo> outputs_by_domain;
-  for (const InputSocketRef *socket : output_node.inputs().drop_front(1).drop_back(1)) {
-    if (!socket_type_has_attribute_toggle(*socket->bsocket())) {
+  for (const bNodeSocket *socket : output_node.input_sockets().drop_front(1).drop_back(1)) {
+    if (!socket_type_has_attribute_toggle(*socket)) {
       continue;
     }
 
-    const std::string prop_name = socket->identifier() + attribute_name_suffix;
+    const std::string prop_name = socket->identifier + attribute_name_suffix;
     const IDProperty *prop = IDP_GetPropertyFromGroup(nmd.settings.properties, prop_name.c_str());
     if (prop == nullptr) {
       continue;
@@ -964,7 +965,7 @@ static MultiValueMap<eAttrDomain, OutputAttributeInfo> find_output_attributes_to
     const GField field = cpp_type->as_field(value.get());
 
     const bNodeSocket *interface_socket = (const bNodeSocket *)BLI_findlink(
-        &nmd.node_group->outputs, socket->index());
+        &nmd.node_group->outputs, index);
     const eAttrDomain domain = (eAttrDomain)interface_socket->attribute_domain;
     OutputAttributeInfo output_info;
     output_info.field = std::move(field);
@@ -1044,7 +1045,7 @@ static void store_computed_output_attributes(
     if (attributes.add(store.name,
                        store.domain,
                        blender::bke::cpp_type_to_custom_data_type(store.data.type()),
-                       blender::bke::AttributeInitMove(store.data.data()))) {
+                       blender::bke::AttributeInitMoveArray(store.data.data()))) {
       continue;
     }
 
@@ -1063,7 +1064,7 @@ static void store_computed_output_attributes(
 
 static void store_output_attributes(GeometrySet &geometry,
                                     const NodesModifierData &nmd,
-                                    const NodeRef &output_node,
+                                    const bNode &output_node,
                                     Span<GMutablePointer> output_values)
 {
   /* All new attribute values have to be computed before the geometry is actually changed. This is
@@ -1079,8 +1080,8 @@ static void store_output_attributes(GeometrySet &geometry,
  * Evaluate a node group to compute the output geometry.
  */
 static GeometrySet compute_geometry(const DerivedNodeTree &tree,
-                                    Span<const NodeRef *> group_input_nodes,
-                                    const NodeRef &output_node,
+                                    Span<const bNode *> group_input_nodes,
+                                    const bNode &output_node,
                                     GeometrySet input_geometry_set,
                                     NodesModifierData *nmd,
                                     const ModifierEvalContext *ctx)
@@ -1092,18 +1093,19 @@ static GeometrySet compute_geometry(const DerivedNodeTree &tree,
   Map<DOutputSocket, GMutablePointer> group_inputs;
 
   const DTreeContext *root_context = &tree.root_context();
-  for (const NodeRef *group_input_node : group_input_nodes) {
-    Span<const OutputSocketRef *> group_input_sockets = group_input_node->outputs().drop_back(1);
+  for (const bNode *group_input_node : group_input_nodes) {
+    Span<const bNodeSocket *> group_input_sockets = group_input_node->output_sockets().drop_back(
+        1);
     if (group_input_sockets.is_empty()) {
       continue;
     }
 
-    Span<const OutputSocketRef *> remaining_input_sockets = group_input_sockets;
+    Span<const bNodeSocket *> remaining_input_sockets = group_input_sockets;
 
     /* If the group expects a geometry as first input, use the geometry that has been passed to
      * modifier. */
-    const OutputSocketRef *first_input_socket = group_input_sockets[0];
-    if (first_input_socket->bsocket()->type == SOCK_GEOMETRY) {
+    const bNodeSocket *first_input_socket = group_input_sockets[0];
+    if (first_input_socket->type == SOCK_GEOMETRY) {
       GeometrySet *geometry_set_in =
           allocator.construct<GeometrySet>(input_geometry_set).release();
       group_inputs.add_new({root_context, first_input_socket}, geometry_set_in);
@@ -1111,8 +1113,8 @@ static GeometrySet compute_geometry(const DerivedNodeTree &tree,
     }
 
     /* Initialize remaining group inputs. */
-    for (const OutputSocketRef *socket : remaining_input_sockets) {
-      const CPPType &cpp_type = *socket->typeinfo()->geometry_nodes_cpp_type;
+    for (const bNodeSocket *socket : remaining_input_sockets) {
+      const CPPType &cpp_type = *socket->typeinfo->geometry_nodes_cpp_type;
       void *value_in = allocator.allocate(cpp_type.size(), cpp_type.alignment());
       initialize_group_input(*nmd, *socket, value_in);
       group_inputs.add_new({root_context, socket}, {cpp_type, value_in});
@@ -1120,7 +1122,7 @@ static GeometrySet compute_geometry(const DerivedNodeTree &tree,
   }
 
   Vector<DInputSocket> group_outputs;
-  for (const InputSocketRef *socket_ref : output_node.inputs().drop_back(1)) {
+  for (const bNodeSocket *socket_ref : output_node.input_sockets().drop_back(1)) {
     group_outputs.append({root_context, socket_ref});
   }
 
@@ -1225,8 +1227,8 @@ static void modifyGeometry(ModifierData *md,
 
   check_property_socket_sync(ctx->object, md);
 
-  NodeTreeRefMap tree_refs;
-  DerivedNodeTree tree{*nmd->node_group, tree_refs};
+  const bNodeTree &root_tree_ref = *nmd->node_group;
+  DerivedNodeTree tree{root_tree_ref};
 
   if (tree.has_link_cycles()) {
     BKE_modifier_set_error(ctx->object, md, "Node group has cycles");
@@ -1234,25 +1236,24 @@ static void modifyGeometry(ModifierData *md,
     return;
   }
 
-  const NodeTreeRef &root_tree_ref = tree.root_context().tree();
-  Span<const NodeRef *> input_nodes = root_tree_ref.nodes_by_type("NodeGroupInput");
-  Span<const NodeRef *> output_nodes = root_tree_ref.nodes_by_type("NodeGroupOutput");
+  Span<const bNode *> input_nodes = root_tree_ref.nodes_by_type("NodeGroupInput");
+  Span<const bNode *> output_nodes = root_tree_ref.nodes_by_type("NodeGroupOutput");
   if (output_nodes.size() != 1) {
     BKE_modifier_set_error(ctx->object, md, "Node group must have a single output node");
     geometry_set.clear();
     return;
   }
 
-  const NodeRef &output_node = *output_nodes[0];
-  Span<const InputSocketRef *> group_outputs = output_node.inputs().drop_back(1);
+  const bNode &output_node = *output_nodes[0];
+  Span<const bNodeSocket *> group_outputs = output_node.input_sockets().drop_back(1);
   if (group_outputs.is_empty()) {
     BKE_modifier_set_error(ctx->object, md, "Node group must have an output socket");
     geometry_set.clear();
     return;
   }
 
-  const InputSocketRef *first_output_socket = group_outputs[0];
-  if (first_output_socket->idname() != "NodeSocketGeometry") {
+  const bNodeSocket *first_output_socket = group_outputs[0];
+  if (!STREQ(first_output_socket->idname, "NodeSocketGeometry")) {
     BKE_modifier_set_error(ctx->object, md, "Node group's first output must be a geometry");
     geometry_set.clear();
     return;
@@ -1277,13 +1278,13 @@ static void modifyGeometry(ModifierData *md,
      * assumed that the output mesh does not have a mapping to the original mesh. */
     Mesh &mesh = *geometry_set.get_mesh_for_write();
     if (use_orig_index_verts) {
-      CustomData_add_layer(&mesh.vdata, CD_ORIGINDEX, CD_DEFAULT, nullptr, mesh.totvert);
+      CustomData_add_layer(&mesh.vdata, CD_ORIGINDEX, CD_SET_DEFAULT, nullptr, mesh.totvert);
     }
     if (use_orig_index_edges) {
-      CustomData_add_layer(&mesh.edata, CD_ORIGINDEX, CD_DEFAULT, nullptr, mesh.totedge);
+      CustomData_add_layer(&mesh.edata, CD_ORIGINDEX, CD_SET_DEFAULT, nullptr, mesh.totedge);
     }
     if (use_orig_index_polys) {
-      CustomData_add_layer(&mesh.pdata, CD_ORIGINDEX, CD_DEFAULT, nullptr, mesh.totpoly);
+      CustomData_add_layer(&mesh.pdata, CD_ORIGINDEX, CD_SET_DEFAULT, nullptr, mesh.totpoly);
     }
   }
 }
diff --git a/source/blender/modifiers/intern/MOD_nodes_evaluator.cc b/source/blender/modifiers/intern/MOD_nodes_evaluator.cc
index 5cf4e21ea68..dd7c87ca499 100644
--- a/source/blender/modifiers/intern/MOD_nodes_evaluator.cc
+++ b/source/blender/modifiers/intern/MOD_nodes_evaluator.cc
@@ -2,6 +2,7 @@
 
 #include "MOD_nodes_evaluator.hh"
 
+#include "BKE_node.h"
 #include "BKE_type_conversions.hh"
 
 #include "NOD_geometry_exec.hh"
@@ -319,9 +320,9 @@ class LockedNode : NonCopyable, NonMovable {
   }
 };
 
-static const CPPType *get_socket_cpp_type(const SocketRef &socket)
+static const CPPType *get_socket_cpp_type(const bNodeSocket &socket)
 {
-  const bNodeSocketType *typeinfo = socket.typeinfo();
+  const bNodeSocketType *typeinfo = socket.typeinfo;
   if (typeinfo->geometry_nodes_cpp_type == nullptr) {
     return nullptr;
   }
@@ -338,24 +339,24 @@ static const CPPType *get_socket_cpp_type(const SocketRef &socket)
 
 static const CPPType *get_socket_cpp_type(const DSocket socket)
 {
-  return get_socket_cpp_type(*socket.socket_ref());
+  return get_socket_cpp_type(*socket);
 }
 
 /**
  * \note This is not supposed to be a long term solution. Eventually we want that nodes can
  * specify more complex defaults (other than just single values) in their socket declarations.
  */
-static bool get_implicit_socket_input(const SocketRef &socket, void *r_value)
+static bool get_implicit_socket_input(const bNodeSocket &socket, void *r_value)
 {
-  const NodeRef &node = socket.node();
-  const nodes::NodeDeclaration *node_declaration = node.declaration();
+  const bNode &node = socket.owner_node();
+  const nodes::NodeDeclaration *node_declaration = node.runtime->declaration;
   if (node_declaration == nullptr) {
     return false;
   }
   const nodes::SocketDeclaration &socket_declaration = *node_declaration->inputs()[socket.index()];
   if (socket_declaration.input_field_type() == nodes::InputSocketFieldType::Implicit) {
-    const bNode &bnode = *socket.bnode();
-    if (socket.typeinfo()->type == SOCK_VECTOR) {
+    const bNode &bnode = socket.owner_node();
+    if (socket.typeinfo->type == SOCK_VECTOR) {
       if (bnode.type == GEO_NODE_SET_CURVE_HANDLES) {
         StringRef side = ((NodeGeometrySetCurveHandlePositions *)bnode.storage)->mode ==
                                  GEO_NODE_CURVE_HANDLE_LEFT ?
@@ -372,7 +373,7 @@ static bool get_implicit_socket_input(const SocketRef &socket, void *r_value)
       new (r_value) ValueOrField<float3>(bke::AttributeFieldInput::Create<float3>("position"));
       return true;
     }
-    if (socket.typeinfo()->type == SOCK_INT) {
+    if (socket.typeinfo->type == SOCK_INT) {
       if (ELEM(bnode.type, FN_NODE_RANDOM_VALUE, GEO_NODE_INSTANCE_ON_POINTS)) {
         new (r_value)
             ValueOrField<int>(Field<int>(std::make_shared<bke::IDAttributeFieldInput>()));
@@ -385,19 +386,19 @@ static bool get_implicit_socket_input(const SocketRef &socket, void *r_value)
   return false;
 }
 
-static void get_socket_value(const SocketRef &socket, void *r_value)
+static void get_socket_value(const bNodeSocket &socket, void *r_value)
 {
   if (get_implicit_socket_input(socket, r_value)) {
     return;
   }
 
-  const bNodeSocketType *typeinfo = socket.typeinfo();
-  typeinfo->get_geometry_nodes_cpp_value(*socket.bsocket(), r_value);
+  const bNodeSocketType *typeinfo = socket.typeinfo;
+  typeinfo->get_geometry_nodes_cpp_value(socket, r_value);
 }
 
 static bool node_supports_laziness(const DNode node)
 {
-  return node->typeinfo()->geometry_node_execute_supports_laziness;
+  return node->typeinfo->geometry_node_execute_supports_laziness;
 }
 
 struct NodeTaskRunState {
@@ -516,9 +517,9 @@ class GeometryNodesEvaluator {
       node_states_.add_new({node, &node_state});
 
       /* Push all linked origins on the stack. */
-      for (const InputSocketRef *input_ref : node->inputs()) {
-        const DInputSocket input{node.context(), input_ref};
-        input.foreach_origin_socket(
+      for (const bNodeSocket *input : node->input_sockets()) {
+        const DInputSocket dinput{node.context(), input};
+        dinput.foreach_origin_socket(
             [&](const DSocket origin) { nodes_to_check.push(origin.node()); });
       }
     }
@@ -546,11 +547,11 @@ class GeometryNodesEvaluator {
   void initialize_node_state(const DNode node, NodeState &node_state, LinearAllocator<> &allocator)
   {
     /* Construct arrays of the correct size. */
-    node_state.inputs = allocator.construct_array<InputState>(node->inputs().size());
-    node_state.outputs = allocator.construct_array<OutputState>(node->outputs().size());
+    node_state.inputs = allocator.construct_array<InputState>(node->input_sockets().size());
+    node_state.outputs = allocator.construct_array<OutputState>(node->output_sockets().size());
 
     /* Initialize input states. */
-    for (const int i : node->inputs().index_range()) {
+    for (const int i : node->input_sockets().index_range()) {
       InputState &input_state = node_state.inputs[i];
       const DInputSocket socket = node.input(i);
       if (!socket->is_available()) {
@@ -567,7 +568,7 @@ class GeometryNodesEvaluator {
         continue;
       }
       /* Construct the correct struct that can hold the input(s). */
-      if (socket->is_multi_input_socket()) {
+      if (socket->is_multi_input()) {
         input_state.value.multi = allocator.construct<MultiInputValue>().release();
         MultiInputValue &multi_value = *input_state.value.multi;
         /* Count how many values should be added until the socket is complete. */
@@ -583,7 +584,7 @@ class GeometryNodesEvaluator {
       }
     }
     /* Initialize output states. */
-    for (const int i : node->outputs().index_range()) {
+    for (const int i : node->output_sockets().index_range()) {
       OutputState &output_state = node_state.outputs[i];
       const DOutputSocket socket = node.output(i);
       if (!socket->is_available()) {
@@ -629,13 +630,13 @@ class GeometryNodesEvaluator {
   void destruct_node_state(const DNode node, NodeState &node_state)
   {
     /* Need to destruct stuff manually, because it's allocated by a custom allocator. */
-    for (const int i : node->inputs().index_range()) {
+    for (const int i : node->input_sockets().index_range()) {
       InputState &input_state = node_state.inputs[i];
       if (input_state.type == nullptr) {
         continue;
       }
-      const InputSocketRef &socket_ref = node->input(i);
-      if (socket_ref.is_multi_input_socket()) {
+      const bNodeSocket &bsocket = node->input_socket(i);
+      if (bsocket.is_multi_input()) {
         MultiInputValue &multi_value = *input_state.value.multi;
         for (void *value : multi_value.values) {
           if (value != nullptr) {
@@ -756,7 +757,7 @@ class GeometryNodesEvaluator {
   {
     /* These nodes are sometimes scheduled. We could also check for them in other places, but
      * it's the easiest to do it here. */
-    if (node->is_group_input_node() || node->is_group_output_node()) {
+    if (ELEM(node->type, NODE_GROUP_INPUT, NODE_GROUP_OUTPUT)) {
       return;
     }
 
@@ -837,7 +838,7 @@ class GeometryNodesEvaluator {
     /* If there are no remaining outputs, all the inputs can be destructed and/or can become
      * unused. This can also trigger a chain reaction where nodes to the left become finished
      * too. */
-    for (const int i : locked_node.node->inputs().index_range()) {
+    for (const int i : locked_node.node->input_sockets().index_range()) {
       const DInputSocket socket = locked_node.node.input(i);
       InputState &input_state = locked_node.node_state.inputs[i];
       if (input_state.usage == ValueUsage::Maybe) {
@@ -883,7 +884,7 @@ class GeometryNodesEvaluator {
       return;
     }
     /* Nodes that don't support laziness require all inputs. */
-    for (const int i : locked_node.node->inputs().index_range()) {
+    for (const int i : locked_node.node->input_sockets().index_range()) {
       InputState &input_state = locked_node.node_state.inputs[i];
       if (input_state.type == nullptr) {
         /* Ignore unavailable/non-data sockets. */
@@ -915,7 +916,7 @@ class GeometryNodesEvaluator {
         continue;
       }
 
-      if (socket->is_multi_input_socket()) {
+      if (socket->is_multi_input()) {
         MultiInputValue &multi_value = *input_state.value.multi;
         /* Checks if all the linked sockets have been provided already. */
         if (multi_value.all_values_available()) {
@@ -949,7 +950,7 @@ class GeometryNodesEvaluator {
    */
   void execute_node(const DNode node, NodeState &node_state, NodeTaskRunState *run_state)
   {
-    const bNode &bnode = *node->bnode();
+    const bNode &bnode = *node;
 
     if (node_state.has_been_executed) {
       if (!node_supports_laziness(node)) {
@@ -978,7 +979,7 @@ class GeometryNodesEvaluator {
   void execute_geometry_node(const DNode node, NodeState &node_state, NodeTaskRunState *run_state)
   {
     using Clock = std::chrono::steady_clock;
-    const bNode &bnode = *node->bnode();
+    const bNode &bnode = *node;
 
     NodeParamsProvider params_provider{*this, node, node_state, run_state};
     GeoNodeExecParams params{params_provider};
@@ -1002,12 +1003,12 @@ class GeometryNodesEvaluator {
     bool any_input_is_field = false;
     Vector<const void *, 16> input_values;
     Vector<const ValueOrFieldCPPType *, 16> input_types;
-    for (const int i : node->inputs().index_range()) {
-      const InputSocketRef &socket_ref = node->input(i);
-      if (!socket_ref.is_available()) {
+    for (const int i : node->input_sockets().index_range()) {
+      const bNodeSocket &bsocket = node->input_socket(i);
+      if (!bsocket.is_available()) {
         continue;
       }
-      BLI_assert(!socket_ref.is_multi_input_socket());
+      BLI_assert(!bsocket.is_multi_input());
       InputState &input_state = node_state.inputs[i];
       BLI_assert(input_state.was_ready_for_execution);
       SingleInputValue &single_value = *input_state.value.single;
@@ -1055,15 +1056,15 @@ class GeometryNodesEvaluator {
     }
 
     int output_index = 0;
-    for (const int i : node->outputs().index_range()) {
-      const OutputSocketRef &socket_ref = node->output(i);
-      if (!socket_ref.is_available()) {
+    for (const int i : node->output_sockets().index_range()) {
+      const bNodeSocket &bsocket = node->output_socket(i);
+      if (!bsocket.is_available()) {
         continue;
       }
       OutputState &output_state = node_state.outputs[i];
-      const DOutputSocket socket{node.context(), &socket_ref};
+      const DOutputSocket socket{node.context(), &bsocket};
       const ValueOrFieldCPPType *cpp_type = static_cast<const ValueOrFieldCPPType *>(
-          get_socket_cpp_type(socket_ref));
+          get_socket_cpp_type(bsocket));
       GField new_field{operation, output_index};
       void *buffer = allocator.allocate(cpp_type->size(), cpp_type->alignment());
       cpp_type->construct_from_field(buffer, std::move(new_field));
@@ -1091,7 +1092,7 @@ class GeometryNodesEvaluator {
     }
 
     Vector<GMutablePointer, 16> output_buffers;
-    for (const int i : node->outputs().index_range()) {
+    for (const int i : node->output_sockets().index_range()) {
       const DOutputSocket socket = node.output(i);
       if (!socket->is_available()) {
         output_buffers.append({});
@@ -1128,7 +1129,7 @@ class GeometryNodesEvaluator {
   void execute_unknown_node(const DNode node, NodeState &node_state, NodeTaskRunState *run_state)
   {
     LinearAllocator<> &allocator = local_allocators_.local();
-    for (const OutputSocketRef *socket : node->outputs()) {
+    for (const bNodeSocket *socket : node->output_sockets()) {
       if (!socket->is_available()) {
         continue;
       }
@@ -1182,8 +1183,8 @@ class GeometryNodesEvaluator {
     const bool supports_laziness = node_supports_laziness(locked_node.node);
     /* Iterating over sockets instead of the states directly, because that makes it easier to
      * figure out which socket is missing when one of the asserts is hit. */
-    for (const OutputSocketRef *socket_ref : locked_node.node->outputs()) {
-      OutputState &output_state = locked_node.node_state.outputs[socket_ref->index()];
+    for (const bNodeSocket *bsocket : locked_node.node->output_sockets()) {
+      OutputState &output_state = locked_node.node_state.outputs[bsocket->index()];
       if (supports_laziness) {
         /* Expected that at least all required sockets have been computed. If more outputs become
          * required later, the node will be executed again. */
@@ -1208,7 +1209,7 @@ class GeometryNodesEvaluator {
   {
     for (const DInputSocket &socket : params_.output_sockets) {
       BLI_assert(socket->is_available());
-      BLI_assert(!socket->is_multi_input_socket());
+      BLI_assert(!socket->is_multi_input());
 
       const DNode node = socket.node();
       NodeState &node_state = this->get_node_state(node);
@@ -1255,7 +1256,7 @@ class GeometryNodesEvaluator {
 
     /* Count how many values still have to be added to this input until it is "complete". */
     int missing_values = 0;
-    if (input_socket->is_multi_input_socket()) {
+    if (input_socket->is_multi_input()) {
       MultiInputValue &multi_value = *input_state.value.multi;
       missing_values = multi_value.missing_values();
     }
@@ -1402,52 +1403,51 @@ class GeometryNodesEvaluator {
     Vector<DInputSocket> forward_original_value_sockets;
     log_original_value_sockets.append(from_socket);
 
-    from_socket.foreach_target_socket(
-        [&](const DInputSocket to_socket, const DOutputSocket::TargetSocketPathInfo &path_info) {
-          if (!this->should_forward_to_socket(to_socket)) {
-            return;
-          }
-          BLI_assert(to_socket == path_info.sockets.last());
-          GMutablePointer current_value = value_to_forward;
-          for (const DSocket &next_socket : path_info.sockets) {
-            const DNode next_node = next_socket.node();
-            const bool is_last_socket = to_socket == next_socket;
-            const bool do_conversion_if_necessary = is_last_socket ||
-                                                    next_node->is_group_output_node() ||
-                                                    (next_node->is_group_node() &&
-                                                     !next_node->is_muted());
-            if (do_conversion_if_necessary) {
-              const CPPType &next_type = *get_socket_cpp_type(next_socket);
-              if (*current_value.type() != next_type) {
-                void *buffer = allocator.allocate(next_type.size(), next_type.alignment());
-                this->convert_value(*current_value.type(), next_type, current_value.get(), buffer);
-                if (current_value.get() != value_to_forward.get()) {
-                  current_value.destruct();
-                }
-                current_value = {next_type, buffer};
-              }
-            }
-            if (current_value.get() == value_to_forward.get()) {
-              /* Log the original value at the current socket. */
-              log_original_value_sockets.append(next_socket);
-            }
-            else {
-              /* Multi-input sockets are logged when all values are available. */
-              if (!(next_socket->is_input() && next_socket->as_input().is_multi_input_socket())) {
-                /* Log the converted value at the socket. */
-                this->log_socket_value({next_socket}, current_value);
-              }
+    from_socket.foreach_target_socket([&](const DInputSocket to_socket,
+                                          const DOutputSocket::TargetSocketPathInfo &path_info) {
+      if (!this->should_forward_to_socket(to_socket)) {
+        return;
+      }
+      BLI_assert(to_socket == path_info.sockets.last());
+      GMutablePointer current_value = value_to_forward;
+      for (const DSocket &next_socket : path_info.sockets) {
+        const DNode next_node = next_socket.node();
+        const bool is_last_socket = to_socket == next_socket;
+        const bool do_conversion_if_necessary = is_last_socket ||
+                                                next_node->type == NODE_GROUP_OUTPUT ||
+                                                (next_node->is_group() && !next_node->is_muted());
+        if (do_conversion_if_necessary) {
+          const CPPType &next_type = *get_socket_cpp_type(next_socket);
+          if (*current_value.type() != next_type) {
+            void *buffer = allocator.allocate(next_type.size(), next_type.alignment());
+            this->convert_value(*current_value.type(), next_type, current_value.get(), buffer);
+            if (current_value.get() != value_to_forward.get()) {
+              current_value.destruct();
             }
+            current_value = {next_type, buffer};
           }
-          if (current_value.get() == value_to_forward.get()) {
-            /* The value has not been converted, so forward the original value. */
-            forward_original_value_sockets.append(to_socket);
-          }
-          else {
-            /* The value has been converted. */
-            this->add_value_to_input_socket(to_socket, from_socket, current_value, run_state);
+        }
+        if (current_value.get() == value_to_forward.get()) {
+          /* Log the original value at the current socket. */
+          log_original_value_sockets.append(next_socket);
+        }
+        else {
+          /* Multi-input sockets are logged when all values are available. */
+          if (!(next_socket->is_input() && next_socket->is_multi_input())) {
+            /* Log the converted value at the socket. */
+            this->log_socket_value({next_socket}, current_value);
           }
-        });
+        }
+      }
+      if (current_value.get() == value_to_forward.get()) {
+        /* The value has not been converted, so forward the original value. */
+        forward_original_value_sockets.append(to_socket);
+      }
+      else {
+        /* The value has been converted. */
+        this->add_value_to_input_socket(to_socket, from_socket, current_value, run_state);
+      }
+    });
     this->log_socket_value(log_original_value_sockets, value_to_forward);
     this->forward_to_sockets_with_same_type(
         allocator, forward_original_value_sockets, value_to_forward, from_socket, run_state);
@@ -1512,7 +1512,7 @@ class GeometryNodesEvaluator {
     InputState &input_state = node_state.inputs[socket->index()];
 
     this->with_locked_node(node, node_state, run_state, [&](LockedNode &locked_node) {
-      if (socket->is_multi_input_socket()) {
+      if (socket->is_multi_input()) {
         /* Add a new value to the multi-input. */
         MultiInputValue &multi_value = *input_state.value.multi;
         multi_value.add_value(origin, value.get());
@@ -1555,7 +1555,7 @@ class GeometryNodesEvaluator {
     UNUSED_VARS(locked_node);
 
     GMutablePointer value = this->get_value_from_socket(origin_socket, *input_state.type);
-    if (input_socket->is_multi_input_socket()) {
+    if (input_socket->is_multi_input()) {
       MultiInputValue &multi_value = *input_state.value.multi;
       multi_value.add_value(origin_socket, value.get());
       if (multi_value.all_values_available()) {
@@ -1580,7 +1580,7 @@ class GeometryNodesEvaluator {
   void destruct_input_value_if_exists(LockedNode &locked_node, const DInputSocket socket)
   {
     InputState &input_state = locked_node.node_state.inputs[socket->index()];
-    if (socket->is_multi_input_socket()) {
+    if (socket->is_multi_input()) {
       MultiInputValue &multi_value = *input_state.value.multi;
       for (void *&value : multi_value.values) {
         if (value != nullptr) {
@@ -1605,7 +1605,7 @@ class GeometryNodesEvaluator {
 
     const CPPType &type = *get_socket_cpp_type(socket);
     void *buffer = allocator.allocate(type.size(), type.alignment());
-    get_socket_value(*socket.socket_ref(), buffer);
+    get_socket_value(*socket.bsocket(), buffer);
 
     if (type == required_type) {
       return {type, buffer};
@@ -1762,7 +1762,7 @@ bool NodeParamsProvider::can_get_input(StringRef identifier) const
     return false;
   }
 
-  if (socket->is_multi_input_socket()) {
+  if (socket->is_multi_input()) {
     MultiInputValue &multi_value = *input_state.value.multi;
     return multi_value.all_values_available();
   }
@@ -1783,7 +1783,7 @@ GMutablePointer NodeParamsProvider::extract_input(StringRef identifier)
 {
   const DInputSocket socket = this->dnode.input_by_identifier(identifier);
   BLI_assert(socket);
-  BLI_assert(!socket->is_multi_input_socket());
+  BLI_assert(!socket->is_multi_input());
   BLI_assert(this->can_get_input(identifier));
 
   InputState &input_state = node_state_.inputs[socket->index()];
@@ -1797,7 +1797,7 @@ Vector<GMutablePointer> NodeParamsProvider::extract_multi_input(StringRef identi
 {
   const DInputSocket socket = this->dnode.input_by_identifier(identifier);
   BLI_assert(socket);
-  BLI_assert(socket->is_multi_input_socket());
+  BLI_assert(socket->is_multi_input());
   BLI_assert(this->can_get_input(identifier));
 
   InputState &input_state = node_state_.inputs[socket->index()];
@@ -1816,7 +1816,7 @@ GPointer NodeParamsProvider::get_input(StringRef identifier) const
 {
   const DInputSocket socket = this->dnode.input_by_identifier(identifier);
   BLI_assert(socket);
-  BLI_assert(!socket->is_multi_input_socket());
+  BLI_assert(!socket->is_multi_input());
   BLI_assert(this->can_get_input(identifier));
 
   InputState &input_state = node_state_.inputs[socket->index()];
@@ -1901,7 +1901,7 @@ void NodeParamsProvider::set_default_remaining_outputs()
 {
   LinearAllocator<> &allocator = evaluator_.local_allocators_.local();
 
-  for (const int i : this->dnode->outputs().index_range()) {
+  for (const int i : this->dnode->output_sockets().index_range()) {
     OutputState &output_state = node_state_.outputs[i];
     if (output_state.has_been_computed) {
       continue;
diff --git a/source/blender/modifiers/intern/MOD_normal_edit.c b/source/blender/modifiers/intern/MOD_normal_edit.c
index 5a92aac6cda..9e3e06fb4dc 100644
--- a/source/blender/modifiers/intern/MOD_normal_edit.c
+++ b/source/blender/modifiers/intern/MOD_normal_edit.c
@@ -562,7 +562,7 @@ static Mesh *normalEditModifier_do(NormalEditModifierData *enmd,
   }
 
   if (clnors == NULL) {
-    clnors = CustomData_add_layer(ldata, CD_CUSTOMLOOPNORMAL, CD_CALLOC, NULL, loops_num);
+    clnors = CustomData_add_layer(ldata, CD_CUSTOMLOOPNORMAL, CD_SET_DEFAULT, NULL, loops_num);
   }
 
   MOD_get_vgroup(ob, result, enmd->defgrp_name, &dvert, &defgrp_index);
diff --git a/source/blender/modifiers/intern/MOD_ocean.c b/source/blender/modifiers/intern/MOD_ocean.c
index ea9049200cc..c84d1b56cec 100644
--- a/source/blender/modifiers/intern/MOD_ocean.c
+++ b/source/blender/modifiers/intern/MOD_ocean.c
@@ -292,7 +292,7 @@ static Mesh *generate_ocean_geometry(OceanModifierData *omd, Mesh *mesh_orig, co
   /* add uvs */
   if (CustomData_number_of_layers(&result->ldata, CD_MLOOPUV) < MAX_MTFACE) {
     gogd.mloopuvs = CustomData_add_layer(
-        &result->ldata, CD_MLOOPUV, CD_CALLOC, NULL, polys_num * 4);
+        &result->ldata, CD_MLOOPUV, CD_SET_DEFAULT, NULL, polys_num * 4);
 
     if (gogd.mloopuvs) { /* unlikely to fail */
       gogd.ix = 1.0 / gogd.rx;
@@ -378,12 +378,16 @@ static Mesh *doOcean(ModifierData *md, const ModifierEvalContext *ctx, Mesh *mes
       const int loops_num = result->totloop;
       MLoop *mloops = result->mloop;
       MLoopCol *mloopcols = CustomData_add_layer_named(
-          &result->ldata, CD_PROP_BYTE_COLOR, CD_CALLOC, NULL, loops_num, omd->foamlayername);
+          &result->ldata, CD_PROP_BYTE_COLOR, CD_SET_DEFAULT, NULL, loops_num, omd->foamlayername);
 
       MLoopCol *mloopcols_spray = NULL;
       if (omd->flag & MOD_OCEAN_GENERATE_SPRAY) {
-        mloopcols_spray = CustomData_add_layer_named(
-            &result->ldata, CD_PROP_BYTE_COLOR, CD_CALLOC, NULL, loops_num, omd->spraylayername);
+        mloopcols_spray = CustomData_add_layer_named(&result->ldata,
+                                                     CD_PROP_BYTE_COLOR,
+                                                     CD_SET_DEFAULT,
+                                                     NULL,
+                                                     loops_num,
+                                                     omd->spraylayername);
       }
 
       if (mloopcols) { /* unlikely to fail */
diff --git a/source/blender/modifiers/intern/MOD_screw.c b/source/blender/modifiers/intern/MOD_screw.c
index 3d6a8e27b08..d8b11c0e89e 100644
--- a/source/blender/modifiers/intern/MOD_screw.c
+++ b/source/blender/modifiers/intern/MOD_screw.c
@@ -398,7 +398,7 @@ static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *
   medge_new = result->medge;
 
   if (!CustomData_has_layer(&result->pdata, CD_ORIGINDEX)) {
-    CustomData_add_layer(&result->pdata, CD_ORIGINDEX, CD_CALLOC, NULL, (int)maxPolys);
+    CustomData_add_layer(&result->pdata, CD_ORIGINDEX, CD_SET_DEFAULT, NULL, (int)maxPolys);
   }
 
   int *origindex = CustomData_get_layer(&result->pdata, CD_ORIGINDEX);
diff --git a/source/blender/modifiers/intern/MOD_skin.c b/source/blender/modifiers/intern/MOD_skin.c
index 84795cdb2d9..982f5802df6 100644
--- a/source/blender/modifiers/intern/MOD_skin.c
+++ b/source/blender/modifiers/intern/MOD_skin.c
@@ -1888,7 +1888,7 @@ static void skin_set_orig_indices(Mesh *mesh)
   int *orig, totpoly;
 
   totpoly = mesh->totpoly;
-  orig = CustomData_add_layer(&mesh->pdata, CD_ORIGINDEX, CD_CALLOC, NULL, totpoly);
+  orig = CustomData_add_layer(&mesh->pdata, CD_ORIGINDEX, CD_CONSTRUCT, NULL, totpoly);
   copy_vn_i(orig, totpoly, ORIGINDEX_NONE);
 }
 
diff --git a/source/blender/modifiers/intern/MOD_solidify_extrude.c b/source/blender/modifiers/intern/MOD_solidify_extrude.c
index 53c6ee9a1a8..aa8c49ee0b8 100644
--- a/source/blender/modifiers/intern/MOD_solidify_extrude.c
+++ b/source/blender/modifiers/intern/MOD_solidify_extrude.c
@@ -996,7 +996,7 @@ Mesh *MOD_solidify_extrude_modifyMesh(ModifierData *md, const ModifierEvalContex
     if (dvert == NULL) {
       /* Add a valid data layer! */
       dvert = CustomData_add_layer(
-          &result->vdata, CD_MDEFORMVERT, CD_CALLOC, NULL, result->totvert);
+          &result->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, result->totvert);
     }
     /* Ultimate security check. */
     if (dvert != NULL) {
diff --git a/source/blender/modifiers/intern/MOD_solidify_nonmanifold.c b/source/blender/modifiers/intern/MOD_solidify_nonmanifold.c
index 64a00478ce8..29adbd70198 100644
--- a/source/blender/modifiers/intern/MOD_solidify_nonmanifold.c
+++ b/source/blender/modifiers/intern/MOD_solidify_nonmanifold.c
@@ -1981,7 +1981,7 @@ Mesh *MOD_solidify_nonmanifold_modifyMesh(ModifierData *md,
     if (dvert == NULL) {
       /* Add a valid data layer! */
       dvert = CustomData_add_layer(
-          &result->vdata, CD_MDEFORMVERT, CD_CALLOC, NULL, result->totvert);
+          &result->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, result->totvert);
     }
     result->dvert = dvert;
   }
diff --git a/source/blender/modifiers/intern/MOD_uvproject.c b/source/blender/modifiers/intern/MOD_uvproject.c
index 4646ba41a74..ccef867b752 100644
--- a/source/blender/modifiers/intern/MOD_uvproject.c
+++ b/source/blender/modifiers/intern/MOD_uvproject.c
@@ -124,7 +124,7 @@ static Mesh *uvprojectModifier_do(UVProjectModifierData *umd,
    * (e.g. if a preceding modifier could not preserve it). */
   if (!CustomData_has_layer(&mesh->ldata, CD_MLOOPUV)) {
     CustomData_add_layer_named(
-        &mesh->ldata, CD_MLOOPUV, CD_DEFAULT, NULL, mesh->totloop, umd->uvlayer_name);
+        &mesh->ldata, CD_MLOOPUV, CD_SET_DEFAULT, NULL, mesh->totloop, umd->uvlayer_name);
   }
 
   /* make sure we're using an existing layer */
diff --git a/source/blender/modifiers/intern/MOD_weighted_normal.c b/source/blender/modifiers/intern/MOD_weighted_normal.c
index 039497b725b..5b5d464a710 100644
--- a/source/blender/modifiers/intern/MOD_weighted_normal.c
+++ b/source/blender/modifiers/intern/MOD_weighted_normal.c
@@ -609,7 +609,8 @@ static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *
    * it helps when generating clnor spaces and default normals. */
   const bool has_clnors = clnors != NULL;
   if (!clnors) {
-    clnors = CustomData_add_layer(&result->ldata, CD_CUSTOMLOOPNORMAL, CD_CALLOC, NULL, loops_num);
+    clnors = CustomData_add_layer(
+        &result->ldata, CD_CUSTOMLOOPNORMAL, CD_SET_DEFAULT, NULL, loops_num);
   }
 
   MDeformVert *dvert;
diff --git a/source/blender/modifiers/intern/MOD_weightvgedit.c b/source/blender/modifiers/intern/MOD_weightvgedit.c
index 2a509ddf220..d71813c7dd5 100644
--- a/source/blender/modifiers/intern/MOD_weightvgedit.c
+++ b/source/blender/modifiers/intern/MOD_weightvgedit.c
@@ -203,7 +203,7 @@ static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *
   }
   else {
     /* Add a valid data layer! */
-    dvert = CustomData_add_layer(&mesh->vdata, CD_MDEFORMVERT, CD_CALLOC, NULL, verts_num);
+    dvert = CustomData_add_layer(&mesh->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, verts_num);
   }
   /* Ultimate security check. */
   if (!dvert) {
diff --git a/source/blender/modifiers/intern/MOD_weightvgmix.c b/source/blender/modifiers/intern/MOD_weightvgmix.c
index aa648eaec97..1d38333f15b 100644
--- a/source/blender/modifiers/intern/MOD_weightvgmix.c
+++ b/source/blender/modifiers/intern/MOD_weightvgmix.c
@@ -268,7 +268,7 @@ static Mesh *modifyMesh(ModifierData *md, const ModifierEvalContext *ctx, Mesh *
   }
   else {
     /* Add a valid data layer! */
-    dvert = CustomData_add_layer(&mesh->vdata, CD_MDEFORMVERT, CD_CALLOC, NULL, verts_num);
+    dvert = CustomData_add_layer(&mesh->vdata, CD_MDEFORMVERT, CD_SET_DEFAULT, NULL, verts_num);
   }
   /* Ultimate security check. */
   if (!dvert) {
diff --git a/source/blender/nodes/CMakeLists.txt b/source/blender/nodes/CMakeLists.txt
index ae31fd7ff5f..ff8bd27f8d7 100644
--- a/source/blender/nodes/CMakeLists.txt
+++ b/source/blender/nodes/CMakeLists.txt
@@ -49,7 +49,6 @@ set(SRC
   intern/node_multi_function.cc
   intern/node_socket.cc
   intern/node_socket_declarations.cc
-  intern/node_tree_ref.cc
   intern/node_util.c
   intern/socket_search_link.cc
 
@@ -63,7 +62,6 @@ set(SRC
   NOD_math_functions.hh
   NOD_multi_function.hh
   NOD_node_declaration.hh
-  NOD_node_tree_ref.hh
   NOD_shader.h
   NOD_socket.h
   NOD_socket_declarations.hh
diff --git a/source/blender/nodes/NOD_derived_node_tree.hh b/source/blender/nodes/NOD_derived_node_tree.hh
index b0799d90dcd..b3775e729da 100644
--- a/source/blender/nodes/NOD_derived_node_tree.hh
+++ b/source/blender/nodes/NOD_derived_node_tree.hh
@@ -5,16 +5,17 @@
 /** \file
  * \ingroup nodes
  *
- * DerivedNodeTree builds on top of NodeTreeRef and makes working with (nested) node groups more
- * convenient and safe. It does so by pairing nodes and sockets with a context. The context
- * contains information about the current "instance" of the node or socket. A node might be
- * "instanced" multiple times when it is in a node group that is used multiple times.
+ * DerivedNodeTree makes working with (nested) node groups more convenient and safe. It does so by
+ * pairing nodes and sockets with a context. The context contains information about the current
+ * "instance" of the node or socket. A node might be "instanced" multiple times when it is in a
+ * node group that is used multiple times.
  */
 
 #include "BLI_function_ref.hh"
+#include "BLI_linear_allocator.hh"
 #include "BLI_vector_set.hh"
 
-#include "NOD_node_tree_ref.hh"
+#include "BKE_node_runtime.hh"
 
 namespace blender::nodes {
 
@@ -40,20 +41,20 @@ class DTreeContext {
   DTreeContext *parent_context_;
   /* Null when this context is for the root node group. Otherwise it points to the group node in
    * the parent node group that contains this context. */
-  const NodeRef *parent_node_;
+  const bNode *parent_node_;
   /* The current node tree. */
-  const NodeTreeRef *tree_;
+  const bNodeTree *btree_;
   /* All the children contexts of this context. */
-  Map<const NodeRef *, DTreeContext *> children_;
+  Map<const bNode *, DTreeContext *> children_;
   DerivedNodeTree *derived_tree_;
 
   friend DerivedNodeTree;
 
  public:
-  const NodeTreeRef &tree() const;
+  const bNodeTree &btree() const;
   const DTreeContext *parent_context() const;
-  const NodeRef *parent_node() const;
-  const DTreeContext *child_context(const NodeRef &node) const;
+  const bNode *parent_node() const;
+  const DTreeContext *child_context(const bNode &node) const;
   const DerivedNodeTree &derived_tree() const;
   bool is_root() const;
 };
@@ -65,15 +66,16 @@ class DTreeContext {
 class DNode {
  private:
   const DTreeContext *context_ = nullptr;
-  const NodeRef *node_ref_ = nullptr;
+  const bNode *bnode_ = nullptr;
 
  public:
   DNode() = default;
-  DNode(const DTreeContext *context, const NodeRef *node);
+  DNode(const DTreeContext *context, const bNode *node);
 
   const DTreeContext *context() const;
-  const NodeRef *node_ref() const;
-  const NodeRef *operator->() const;
+  const bNode *bnode() const;
+  const bNode *operator->() const;
+  const bNode &operator*() const;
 
   friend bool operator==(const DNode &a, const DNode &b);
   friend bool operator!=(const DNode &a, const DNode &b);
@@ -98,17 +100,18 @@ class DNode {
 class DSocket {
  protected:
   const DTreeContext *context_ = nullptr;
-  const SocketRef *socket_ref_ = nullptr;
+  const bNodeSocket *bsocket_ = nullptr;
 
  public:
   DSocket() = default;
-  DSocket(const DTreeContext *context, const SocketRef *socket);
+  DSocket(const DTreeContext *context, const bNodeSocket *socket);
   DSocket(const DInputSocket &input_socket);
   DSocket(const DOutputSocket &output_socket);
 
   const DTreeContext *context() const;
-  const SocketRef *socket_ref() const;
-  const SocketRef *operator->() const;
+  const bNodeSocket *bsocket() const;
+  const bNodeSocket *operator->() const;
+  const bNodeSocket &operator*() const;
 
   friend bool operator==(const DSocket &a, const DSocket &b);
   friend bool operator!=(const DSocket &a, const DSocket &b);
@@ -123,12 +126,9 @@ class DSocket {
 class DInputSocket : public DSocket {
  public:
   DInputSocket() = default;
-  DInputSocket(const DTreeContext *context, const InputSocketRef *socket);
+  DInputSocket(const DTreeContext *context, const bNodeSocket *socket);
   explicit DInputSocket(const DSocket &base_socket);
 
-  const InputSocketRef *socket_ref() const;
-  const InputSocketRef *operator->() const;
-
   DOutputSocket get_corresponding_group_node_output() const;
   Vector<DOutputSocket, 4> get_corresponding_group_input_sockets() const;
 
@@ -144,12 +144,9 @@ class DInputSocket : public DSocket {
 class DOutputSocket : public DSocket {
  public:
   DOutputSocket() = default;
-  DOutputSocket(const DTreeContext *context, const OutputSocketRef *socket);
+  DOutputSocket(const DTreeContext *context, const bNodeSocket *socket);
   explicit DOutputSocket(const DSocket &base_socket);
 
-  const OutputSocketRef *socket_ref() const;
-  const OutputSocketRef *operator->() const;
-
   DInputSocket get_corresponding_group_node_input() const;
   DInputSocket get_active_corresponding_group_output_socket() const;
 
@@ -177,7 +174,7 @@ class DerivedNodeTree {
  private:
   LinearAllocator<> allocator_;
   DTreeContext *root_context_;
-  VectorSet<const NodeTreeRef *> used_node_tree_refs_;
+  VectorSet<const bNodeTree *> used_btrees_;
 
  public:
   /**
@@ -186,11 +183,11 @@ class DerivedNodeTree {
    * has to make sure that the node tree refs added to #node_tree_refs live at least as long as the
    * derived node tree.
    */
-  DerivedNodeTree(bNodeTree &btree, NodeTreeRefMap &node_tree_refs);
+  DerivedNodeTree(const bNodeTree &btree);
   ~DerivedNodeTree();
 
   const DTreeContext &root_context() const;
-  Span<const NodeTreeRef *> used_node_tree_refs() const;
+  Span<const bNodeTree *> used_btrees() const;
 
   /**
    * \return True when there is a link cycle. Unavailable sockets are ignored.
@@ -205,9 +202,8 @@ class DerivedNodeTree {
 
  private:
   DTreeContext &construct_context_recursively(DTreeContext *parent_context,
-                                              const NodeRef *parent_node,
-                                              bNodeTree &btree,
-                                              NodeTreeRefMap &node_tree_refs);
+                                              const bNode *parent_node,
+                                              const bNodeTree &btree);
   void destruct_context_recursively(DTreeContext *context);
 
   void foreach_node_in_context_recursive(const DTreeContext &context,
@@ -215,7 +211,6 @@ class DerivedNodeTree {
 };
 
 namespace derived_node_tree_types {
-using namespace node_tree_ref_types;
 using nodes::DerivedNodeTree;
 using nodes::DInputSocket;
 using nodes::DNode;
@@ -228,9 +223,9 @@ using nodes::DTreeContext;
 /** \name #DTreeContext Inline Methods
  * \{ */
 
-inline const NodeTreeRef &DTreeContext::tree() const
+inline const bNodeTree &DTreeContext::btree() const
 {
-  return *tree_;
+  return *btree_;
 }
 
 inline const DTreeContext *DTreeContext::parent_context() const
@@ -238,12 +233,12 @@ inline const DTreeContext *DTreeContext::parent_context() const
   return parent_context_;
 }
 
-inline const NodeRef *DTreeContext::parent_node() const
+inline const bNode *DTreeContext::parent_node() const
 {
   return parent_node_;
 }
 
-inline const DTreeContext *DTreeContext::child_context(const NodeRef &node) const
+inline const DTreeContext *DTreeContext::child_context(const bNode &node) const
 {
   return children_.lookup_default(&node, nullptr);
 }
@@ -264,10 +259,10 @@ inline bool DTreeContext::is_root() const
 /** \name #DNode Inline Methods
  * \{ */
 
-inline DNode::DNode(const DTreeContext *context, const NodeRef *node_ref)
-    : context_(context), node_ref_(node_ref)
+inline DNode::DNode(const DTreeContext *context, const bNode *bnode)
+    : context_(context), bnode_(bnode)
 {
-  BLI_assert(node_ref == nullptr || &node_ref->tree() == &context->tree());
+  BLI_assert(bnode == nullptr || bnode->runtime->owner_tree == &context->btree());
 }
 
 inline const DTreeContext *DNode::context() const
@@ -275,14 +270,14 @@ inline const DTreeContext *DNode::context() const
   return context_;
 }
 
-inline const NodeRef *DNode::node_ref() const
+inline const bNode *DNode::bnode() const
 {
-  return node_ref_;
+  return bnode_;
 }
 
 inline bool operator==(const DNode &a, const DNode &b)
 {
-  return a.context_ == b.context_ && a.node_ref_ == b.node_ref_;
+  return a.context_ == b.context_ && a.bnode_ == b.bnode_;
 }
 
 inline bool operator!=(const DNode &a, const DNode &b)
@@ -292,37 +287,43 @@ inline bool operator!=(const DNode &a, const DNode &b)
 
 inline DNode::operator bool() const
 {
-  return node_ref_ != nullptr;
+  return bnode_ != nullptr;
+}
+
+inline const bNode *DNode::operator->() const
+{
+  return bnode_;
 }
 
-inline const NodeRef *DNode::operator->() const
+inline const bNode &DNode::operator*() const
 {
-  return node_ref_;
+  BLI_assert(bnode_ != nullptr);
+  return *bnode_;
 }
 
 inline uint64_t DNode::hash() const
 {
-  return get_default_hash_2(context_, node_ref_);
+  return get_default_hash_2(context_, bnode_);
 }
 
 inline DInputSocket DNode::input(int index) const
 {
-  return {context_, &node_ref_->input(index)};
+  return {context_, &bnode_->input_socket(index)};
 }
 
 inline DOutputSocket DNode::output(int index) const
 {
-  return {context_, &node_ref_->output(index)};
+  return {context_, &bnode_->output_socket(index)};
 }
 
 inline DInputSocket DNode::input_by_identifier(StringRef identifier) const
 {
-  return {context_, &node_ref_->input_by_identifier(identifier)};
+  return {context_, &bnode_->input_by_identifier(identifier)};
 }
 
 inline DOutputSocket DNode::output_by_identifier(StringRef identifier) const
 {
-  return {context_, &node_ref_->output_by_identifier(identifier)};
+  return {context_, &bnode_->output_by_identifier(identifier)};
 }
 
 /** \} */
@@ -331,19 +332,20 @@ inline DOutputSocket DNode::output_by_identifier(StringRef identifier) const
 /** \name #DSocket Inline Methods
  * \{ */
 
-inline DSocket::DSocket(const DTreeContext *context, const SocketRef *socket_ref)
-    : context_(context), socket_ref_(socket_ref)
+inline DSocket::DSocket(const DTreeContext *context, const bNodeSocket *bsocket)
+    : context_(context), bsocket_(bsocket)
 {
-  BLI_assert(socket_ref == nullptr || &socket_ref->tree() == &context->tree());
+  BLI_assert(bsocket == nullptr ||
+             bsocket->runtime->owner_node->runtime->owner_tree == &context->btree());
 }
 
 inline DSocket::DSocket(const DInputSocket &input_socket)
-    : DSocket(input_socket.context_, input_socket.socket_ref_)
+    : DSocket(input_socket.context_, input_socket.bsocket_)
 {
 }
 
 inline DSocket::DSocket(const DOutputSocket &output_socket)
-    : DSocket(output_socket.context_, output_socket.socket_ref_)
+    : DSocket(output_socket.context_, output_socket.bsocket_)
 {
 }
 
@@ -352,14 +354,14 @@ inline const DTreeContext *DSocket::context() const
   return context_;
 }
 
-inline const SocketRef *DSocket::socket_ref() const
+inline const bNodeSocket *DSocket::bsocket() const
 {
-  return socket_ref_;
+  return bsocket_;
 }
 
 inline bool operator==(const DSocket &a, const DSocket &b)
 {
-  return a.context_ == b.context_ && a.socket_ref_ == b.socket_ref_;
+  return a.context_ == b.context_ && a.bsocket_ == b.bsocket_;
 }
 
 inline bool operator!=(const DSocket &a, const DSocket &b)
@@ -369,23 +371,29 @@ inline bool operator!=(const DSocket &a, const DSocket &b)
 
 inline DSocket::operator bool() const
 {
-  return socket_ref_ != nullptr;
+  return bsocket_ != nullptr;
 }
 
-inline const SocketRef *DSocket::operator->() const
+inline const bNodeSocket *DSocket::operator->() const
 {
-  return socket_ref_;
+  return bsocket_;
+}
+
+inline const bNodeSocket &DSocket::operator*() const
+{
+  BLI_assert(bsocket_ != nullptr);
+  return *bsocket_;
 }
 
 inline uint64_t DSocket::hash() const
 {
-  return get_default_hash_2(context_, socket_ref_);
+  return get_default_hash_2(context_, bsocket_);
 }
 
 inline DNode DSocket::node() const
 {
-  BLI_assert(socket_ref_ != nullptr);
-  return {context_, &socket_ref_->node()};
+  BLI_assert(bsocket_ != nullptr);
+  return {context_, bsocket_->runtime->owner_node};
 }
 
 /** \} */
@@ -394,8 +402,8 @@ inline DNode DSocket::node() const
 /** \name #DInputSocket Inline Methods
  * \{ */
 
-inline DInputSocket::DInputSocket(const DTreeContext *context, const InputSocketRef *socket_ref)
-    : DSocket(context, socket_ref)
+inline DInputSocket::DInputSocket(const DTreeContext *context, const bNodeSocket *bsocket)
+    : DSocket(context, bsocket)
 {
 }
 
@@ -404,24 +412,14 @@ inline DInputSocket::DInputSocket(const DSocket &base_socket) : DSocket(base_soc
   BLI_assert(base_socket->is_input());
 }
 
-inline const InputSocketRef *DInputSocket::socket_ref() const
-{
-  return (const InputSocketRef *)socket_ref_;
-}
-
-inline const InputSocketRef *DInputSocket::operator->() const
-{
-  return (const InputSocketRef *)socket_ref_;
-}
-
 /** \} */
 
 /* -------------------------------------------------------------------- */
 /** \name #DOutputSocket Inline Methods
  * \{ */
 
-inline DOutputSocket::DOutputSocket(const DTreeContext *context, const OutputSocketRef *socket_ref)
-    : DSocket(context, socket_ref)
+inline DOutputSocket::DOutputSocket(const DTreeContext *context, const bNodeSocket *bsocket)
+    : DSocket(context, bsocket)
 {
 }
 
@@ -430,16 +428,6 @@ inline DOutputSocket::DOutputSocket(const DSocket &base_socket) : DSocket(base_s
   BLI_assert(base_socket->is_output());
 }
 
-inline const OutputSocketRef *DOutputSocket::socket_ref() const
-{
-  return (const OutputSocketRef *)socket_ref_;
-}
-
-inline const OutputSocketRef *DOutputSocket::operator->() const
-{
-  return (const OutputSocketRef *)socket_ref_;
-}
-
 /** \} */
 
 /* -------------------------------------------------------------------- */
@@ -451,9 +439,9 @@ inline const DTreeContext &DerivedNodeTree::root_context() const
   return *root_context_;
 }
 
-inline Span<const NodeTreeRef *> DerivedNodeTree::used_node_tree_refs() const
+inline Span<const bNodeTree *> DerivedNodeTree::used_btrees() const
 {
-  return used_node_tree_refs_;
+  return used_btrees_;
 }
 
 /** \} */
diff --git a/source/blender/nodes/NOD_geometry_exec.hh b/source/blender/nodes/NOD_geometry_exec.hh
index a7f5fbf1926..b5ffd3a317c 100644
--- a/source/blender/nodes/NOD_geometry_exec.hh
+++ b/source/blender/nodes/NOD_geometry_exec.hh
@@ -283,7 +283,7 @@ class GeoNodeExecParams {
    */
   const bNode &node() const
   {
-    return *provider_->dnode->bnode();
+    return *provider_->dnode;
   }
 
   const Object *self_object() const
diff --git a/source/blender/nodes/NOD_multi_function.hh b/source/blender/nodes/NOD_multi_function.hh
index b6d51578b1c..21a94d9192b 100644
--- a/source/blender/nodes/NOD_multi_function.hh
+++ b/source/blender/nodes/NOD_multi_function.hh
@@ -19,15 +19,15 @@ class NodeMultiFunctions;
  */
 class NodeMultiFunctionBuilder : NonCopyable, NonMovable {
  private:
-  bNode &node_;
-  bNodeTree &tree_;
+  const bNode &node_;
+  const bNodeTree &tree_;
   std::shared_ptr<MultiFunction> owned_built_fn_;
   const MultiFunction *built_fn_ = nullptr;
 
   friend NodeMultiFunctions;
 
  public:
-  NodeMultiFunctionBuilder(bNode &node, bNodeTree &tree);
+  NodeMultiFunctionBuilder(const bNode &node, const bNodeTree &tree);
 
   /**
    * Assign a multi-function for the current node. The input and output parameters of the function
@@ -42,8 +42,8 @@ class NodeMultiFunctionBuilder : NonCopyable, NonMovable {
    */
   template<typename T, typename... Args> void construct_and_set_matching_fn(Args &&...args);
 
-  bNode &node();
-  bNodeTree &tree();
+  const bNode &node();
+  const bNodeTree &tree();
 };
 
 /**
@@ -69,17 +69,17 @@ class NodeMultiFunctions {
 /** \name #NodeMultiFunctionBuilder Inline Methods
  * \{ */
 
-inline NodeMultiFunctionBuilder::NodeMultiFunctionBuilder(bNode &node, bNodeTree &tree)
+inline NodeMultiFunctionBuilder::NodeMultiFunctionBuilder(const bNode &node, const bNodeTree &tree)
     : node_(node), tree_(tree)
 {
 }
 
-inline bNode &NodeMultiFunctionBuilder::node()
+inline const bNode &NodeMultiFunctionBuilder::node()
 {
   return node_;
 }
 
-inline bNodeTree &NodeMultiFunctionBuilder::tree()
+inline const bNodeTree &NodeMultiFunctionBuilder::tree()
 {
   return tree_;
 }
@@ -110,7 +110,7 @@ inline void NodeMultiFunctionBuilder::construct_and_set_matching_fn(Args &&...ar
 inline const NodeMultiFunctions::Item &NodeMultiFunctions::try_get(const DNode &node) const
 {
   static Item empty_item;
-  const Item *item = map_.lookup_ptr(node->bnode());
+  const Item *item = map_.lookup_ptr(node.bnode());
   if (item == nullptr) {
     return empty_item;
   }
diff --git a/source/blender/nodes/NOD_node_tree_ref.hh b/source/blender/nodes/NOD_node_tree_ref.hh
deleted file mode 100644
index 257aa5f4110..00000000000
--- a/source/blender/nodes/NOD_node_tree_ref.hh
+++ /dev/null
@@ -1,760 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-
-#pragma once
-
-/** \file
- * \ingroup nodes
- *
- * NodeTreeRef makes querying information about a bNodeTree more efficient. It is an immutable data
- * structure. It should not be used after anymore, after the underlying node tree changed.
- *
- * The following queries are supported efficiently:
- *  - socket -> index of socket
- *  - socket -> directly linked sockets
- *  - socket -> directly linked links
- *  - socket -> linked sockets when skipping reroutes
- *  - socket -> node
- *  - socket/node -> rna pointer
- *  - node -> inputs/outputs
- *  - node -> tree
- *  - tree -> all nodes
- *  - tree -> all (input/output) sockets
- *  - idname -> nodes
- *
- * Every socket has an id. The id-space is shared between input and output sockets.
- * When storing data per socket, it is often better to use the id as index into an array, instead
- * of a hash table.
- *
- * Every node has an id as well. The same rule regarding hash tables applies.
- *
- * There is an utility to export this data structure as graph in dot format.
- */
-
-#include "BLI_array.hh"
-#include "BLI_function_ref.hh"
-#include "BLI_linear_allocator.hh"
-#include "BLI_map.hh"
-#include "BLI_multi_value_map.hh"
-#include "BLI_string_ref.hh"
-#include "BLI_timeit.hh"
-#include "BLI_utility_mixins.hh"
-#include "BLI_vector.hh"
-
-#include "BKE_node.h"
-#include "BKE_node_runtime.hh"
-
-#include "DNA_node_types.h"
-
-#include "RNA_access.h"
-
-namespace blender::nodes {
-
-class SocketRef;
-class InputSocketRef;
-class OutputSocketRef;
-class NodeRef;
-class NodeTreeRef;
-class LinkRef;
-class InternalLinkRef;
-
-using SocketIndexByIdentifierMap = Map<std::string, int>;
-
-class SocketRef : NonCopyable, NonMovable {
- protected:
-  NodeRef *node_;
-  bNodeSocket *bsocket_;
-  bool is_input_;
-  int id_;
-  int index_;
-  Vector<LinkRef *> directly_linked_links_;
-
-  /* These sockets are linked directly, i.e. with a single link in between. */
-  MutableSpan<const SocketRef *> directly_linked_sockets_;
-  /* These sockets are linked when reroutes, muted links and muted nodes have been taken into
-   * account. */
-  MutableSpan<const SocketRef *> logically_linked_sockets_;
-  /* These are the sockets that have been skipped when searching for logically linked sockets.
-   * That includes for example the input and output socket of an intermediate reroute node. */
-  MutableSpan<const SocketRef *> logically_linked_skipped_sockets_;
-
-  friend NodeTreeRef;
-
- public:
-  Span<const SocketRef *> logically_linked_sockets() const;
-  Span<const SocketRef *> logically_linked_skipped_sockets() const;
-  Span<const SocketRef *> directly_linked_sockets() const;
-  Span<const LinkRef *> directly_linked_links() const;
-
-  bool is_directly_linked() const;
-  bool is_logically_linked() const;
-
-  const NodeRef &node() const;
-  const NodeTreeRef &tree() const;
-
-  int id() const;
-  int index() const;
-
-  bool is_input() const;
-  bool is_output() const;
-
-  const SocketRef &as_base() const;
-  const InputSocketRef &as_input() const;
-  const OutputSocketRef &as_output() const;
-
-  PointerRNA rna() const;
-
-  StringRefNull idname() const;
-  StringRefNull name() const;
-  StringRefNull identifier() const;
-  bNodeSocketType *typeinfo() const;
-
-  bNodeSocket *bsocket() const;
-  bNode *bnode() const;
-  bNodeTree *btree() const;
-
-  bool is_available() const;
-  bool is_undefined() const;
-
-  void *default_value() const;
-  template<typename T> T *default_value() const;
-};
-
-class InputSocketRef final : public SocketRef {
- public:
-  friend NodeTreeRef;
-
-  Span<const OutputSocketRef *> logically_linked_sockets() const;
-  Span<const OutputSocketRef *> directly_linked_sockets() const;
-
-  bool is_multi_input_socket() const;
-
- private:
-  void foreach_logical_origin(FunctionRef<void(const OutputSocketRef &)> origin_fn,
-                              FunctionRef<void(const SocketRef &)> skipped_fn,
-                              bool only_follow_first_input_link,
-                              Vector<const InputSocketRef *> &seen_sockets_stack) const;
-};
-
-class OutputSocketRef final : public SocketRef {
- public:
-  friend NodeTreeRef;
-
-  Span<const InputSocketRef *> logically_linked_sockets() const;
-  Span<const InputSocketRef *> directly_linked_sockets() const;
-
- private:
-  void foreach_logical_target(FunctionRef<void(const InputSocketRef &)> target_fn,
-                              FunctionRef<void(const SocketRef &)> skipped_fn,
-                              Vector<const OutputSocketRef *> &seen_sockets_stack) const;
-};
-
-class NodeRef : NonCopyable, NonMovable {
- private:
-  NodeTreeRef *tree_;
-  bNode *bnode_;
-  int id_;
-  Vector<InputSocketRef *> inputs_;
-  Vector<OutputSocketRef *> outputs_;
-  Vector<InternalLinkRef *> internal_links_;
-  SocketIndexByIdentifierMap *input_index_by_identifier_;
-  SocketIndexByIdentifierMap *output_index_by_identifier_;
-
-  friend NodeTreeRef;
-
- public:
-  const NodeTreeRef &tree() const;
-
-  Span<const InputSocketRef *> inputs() const;
-  Span<const OutputSocketRef *> outputs() const;
-  Span<const InternalLinkRef *> internal_links() const;
-  Span<const SocketRef *> sockets(eNodeSocketInOut in_out) const;
-
-  const InputSocketRef &input(int index) const;
-  const OutputSocketRef &output(int index) const;
-
-  const InputSocketRef &input_by_identifier(StringRef identifier) const;
-  const OutputSocketRef &output_by_identifier(StringRef identifier) const;
-
-  bool any_input_is_directly_linked() const;
-  bool any_output_is_directly_linked() const;
-  bool any_socket_is_directly_linked(eNodeSocketInOut in_out) const;
-
-  bNode *bnode() const;
-  bNodeTree *btree() const;
-
-  PointerRNA rna() const;
-  StringRefNull idname() const;
-  StringRefNull name() const;
-  StringRefNull label() const;
-  StringRefNull label_or_name() const;
-  bNodeType *typeinfo() const;
-  const NodeDeclaration *declaration() const;
-
-  int id() const;
-
-  bool is_reroute_node() const;
-  bool is_group_node() const;
-  bool is_group_input_node() const;
-  bool is_group_output_node() const;
-  bool is_muted() const;
-  bool is_frame() const;
-  bool is_undefined() const;
-
-  void *storage() const;
-  template<typename T> T *storage() const;
-};
-
-class LinkRef : NonCopyable, NonMovable {
- private:
-  OutputSocketRef *from_;
-  InputSocketRef *to_;
-  bNodeLink *blink_;
-
-  friend NodeTreeRef;
-
- public:
-  const OutputSocketRef &from() const;
-  const InputSocketRef &to() const;
-
-  bNodeLink *blink() const;
-
-  bool is_muted() const;
-};
-
-class InternalLinkRef : NonCopyable, NonMovable {
- private:
-  InputSocketRef *from_;
-  OutputSocketRef *to_;
-  bNodeLink *blink_;
-
-  friend NodeTreeRef;
-
- public:
-  const InputSocketRef &from() const;
-  const OutputSocketRef &to() const;
-
-  bNodeLink *blink() const;
-};
-
-class NodeTreeRef : NonCopyable, NonMovable {
- private:
-  LinearAllocator<> allocator_;
-  bNodeTree *btree_;
-  Vector<NodeRef *> nodes_by_id_;
-  Vector<SocketRef *> sockets_by_id_;
-  Vector<InputSocketRef *> input_sockets_;
-  Vector<OutputSocketRef *> output_sockets_;
-  Vector<LinkRef *> links_;
-  MultiValueMap<const bNodeType *, NodeRef *> nodes_by_type_;
-  Vector<std::unique_ptr<SocketIndexByIdentifierMap>> owned_identifier_maps_;
-  const NodeRef *group_output_node_ = nullptr;
-
- public:
-  NodeTreeRef(bNodeTree *btree);
-  ~NodeTreeRef();
-
-  Span<const NodeRef *> nodes() const;
-  Span<const NodeRef *> nodes_by_type(StringRefNull idname) const;
-  Span<const NodeRef *> nodes_by_type(const bNodeType *nodetype) const;
-
-  Span<const SocketRef *> sockets() const;
-  Span<const InputSocketRef *> input_sockets() const;
-  Span<const OutputSocketRef *> output_sockets() const;
-
-  Span<const LinkRef *> links() const;
-
-  const NodeRef *find_node(const bNode &bnode) const;
-
-  /**
-   * This is the active group output node if there are multiple.
-   */
-  const NodeRef *group_output_node() const;
-
-  /**
-   * \return True when there is a link cycle. Unavailable sockets are ignored.
-   */
-  bool has_link_cycles() const;
-  bool has_undefined_nodes_or_sockets() const;
-
-  enum class ToposortDirection {
-    LeftToRight,
-    RightToLeft,
-  };
-
-  struct ToposortResult {
-    Vector<const NodeRef *> sorted_nodes;
-    /**
-     * There can't be a correct topological sort of the nodes when there is a cycle. The nodes will
-     * still be sorted to some degree. The caller has to decide whether it can handle non-perfect
-     * sorts or not.
-     */
-    bool has_cycle = false;
-  };
-
-  /**
-   * Sort nodes topologically from left to right or right to left.
-   * In the future the result if this could be cached on #NodeTreeRef.
-   */
-  ToposortResult toposort(ToposortDirection direction) const;
-
-  bNodeTree *btree() const;
-  StringRefNull name() const;
-
-  std::string to_dot() const;
-
- private:
-  /* Utility functions used during construction. */
-  InputSocketRef &find_input_socket(Map<bNode *, NodeRef *> &node_mapping,
-                                    bNode *bnode,
-                                    bNodeSocket *bsocket);
-  OutputSocketRef &find_output_socket(Map<bNode *, NodeRef *> &node_mapping,
-                                      bNode *bnode,
-                                      bNodeSocket *bsocket);
-
-  void create_linked_socket_caches();
-  void create_socket_identifier_maps();
-};
-
-using NodeTreeRefMap = Map<bNodeTree *, std::unique_ptr<const NodeTreeRef>>;
-
-const NodeTreeRef &get_tree_ref_from_map(NodeTreeRefMap &node_tree_refs, bNodeTree &btree);
-
-namespace node_tree_ref_types {
-using nodes::InputSocketRef;
-using nodes::NodeRef;
-using nodes::NodeTreeRef;
-using nodes::NodeTreeRefMap;
-using nodes::OutputSocketRef;
-using nodes::SocketRef;
-}  // namespace node_tree_ref_types
-
-/* -------------------------------------------------------------------- */
-/** \name #SocketRef Inline Methods
- * \{ */
-
-inline Span<const SocketRef *> SocketRef::logically_linked_sockets() const
-{
-  return logically_linked_sockets_;
-}
-
-inline Span<const SocketRef *> SocketRef::logically_linked_skipped_sockets() const
-{
-  return logically_linked_skipped_sockets_;
-}
-
-inline Span<const SocketRef *> SocketRef::directly_linked_sockets() const
-{
-  return directly_linked_sockets_;
-}
-
-inline Span<const LinkRef *> SocketRef::directly_linked_links() const
-{
-  return directly_linked_links_;
-}
-
-inline bool SocketRef::is_directly_linked() const
-{
-  return directly_linked_sockets_.size() > 0;
-}
-
-inline bool SocketRef::is_logically_linked() const
-{
-  return logically_linked_sockets_.size() > 0;
-}
-
-inline const NodeRef &SocketRef::node() const
-{
-  return *node_;
-}
-
-inline const NodeTreeRef &SocketRef::tree() const
-{
-  return node_->tree();
-}
-
-inline int SocketRef::id() const
-{
-  return id_;
-}
-
-inline int SocketRef::index() const
-{
-  return index_;
-}
-
-inline bool SocketRef::is_input() const
-{
-  return is_input_;
-}
-
-inline bool SocketRef::is_output() const
-{
-  return !is_input_;
-}
-
-inline const SocketRef &SocketRef::as_base() const
-{
-  return *this;
-}
-
-inline const InputSocketRef &SocketRef::as_input() const
-{
-  BLI_assert(this->is_input());
-  return static_cast<const InputSocketRef &>(*this);
-}
-
-inline const OutputSocketRef &SocketRef::as_output() const
-{
-  BLI_assert(this->is_output());
-  return static_cast<const OutputSocketRef &>(*this);
-}
-
-inline StringRefNull SocketRef::idname() const
-{
-  return bsocket_->idname;
-}
-
-inline StringRefNull SocketRef::name() const
-{
-  return bsocket_->name;
-}
-
-inline StringRefNull SocketRef::identifier() const
-{
-  return bsocket_->identifier;
-}
-
-inline bNodeSocketType *SocketRef::typeinfo() const
-{
-  return bsocket_->typeinfo;
-}
-
-inline bNodeSocket *SocketRef::bsocket() const
-{
-  return bsocket_;
-}
-
-inline bNode *SocketRef::bnode() const
-{
-  return node_->bnode();
-}
-
-inline bNodeTree *SocketRef::btree() const
-{
-  return node_->btree();
-}
-
-inline bool SocketRef::is_available() const
-{
-  return (bsocket_->flag & SOCK_UNAVAIL) == 0;
-}
-
-inline bool SocketRef::is_undefined() const
-{
-  return bsocket_->typeinfo == &NodeSocketTypeUndefined;
-}
-
-inline void *SocketRef::default_value() const
-{
-  return bsocket_->default_value;
-}
-
-template<typename T> inline T *SocketRef::default_value() const
-{
-  return (T *)bsocket_->default_value;
-}
-
-/** \} */
-
-/* -------------------------------------------------------------------- */
-/** \name #InputSocketRef Inline Methods
- * \{ */
-
-inline Span<const OutputSocketRef *> InputSocketRef::logically_linked_sockets() const
-{
-  return logically_linked_sockets_.as_span().cast<const OutputSocketRef *>();
-}
-
-inline Span<const OutputSocketRef *> InputSocketRef::directly_linked_sockets() const
-{
-  return directly_linked_sockets_.cast<const OutputSocketRef *>();
-}
-
-inline bool InputSocketRef::is_multi_input_socket() const
-{
-  return bsocket_->flag & SOCK_MULTI_INPUT;
-}
-
-/** \} */
-
-/* -------------------------------------------------------------------- */
-/** \name #OutputSocketRef Inline Methods
- * \{ */
-
-inline Span<const InputSocketRef *> OutputSocketRef::logically_linked_sockets() const
-{
-  return logically_linked_sockets_.as_span().cast<const InputSocketRef *>();
-}
-
-inline Span<const InputSocketRef *> OutputSocketRef::directly_linked_sockets() const
-{
-  return directly_linked_sockets_.cast<const InputSocketRef *>();
-}
-
-/** \} */
-
-/* -------------------------------------------------------------------- */
-/** \name #NodeRef Inline Methods
- * \{ */
-
-inline const NodeTreeRef &NodeRef::tree() const
-{
-  return *tree_;
-}
-
-inline Span<const InputSocketRef *> NodeRef::inputs() const
-{
-  return inputs_;
-}
-
-inline Span<const OutputSocketRef *> NodeRef::outputs() const
-{
-  return outputs_;
-}
-
-inline Span<const SocketRef *> NodeRef::sockets(const eNodeSocketInOut in_out) const
-{
-  return in_out == SOCK_IN ? inputs_.as_span().cast<const SocketRef *>() :
-                             outputs_.as_span().cast<const SocketRef *>();
-}
-
-inline Span<const InternalLinkRef *> NodeRef::internal_links() const
-{
-  return internal_links_;
-}
-
-inline const InputSocketRef &NodeRef::input(int index) const
-{
-  return *inputs_[index];
-}
-
-inline const OutputSocketRef &NodeRef::output(int index) const
-{
-  return *outputs_[index];
-}
-
-inline const InputSocketRef &NodeRef::input_by_identifier(StringRef identifier) const
-{
-  const int index = input_index_by_identifier_->lookup_as(identifier);
-  return this->input(index);
-}
-
-inline const OutputSocketRef &NodeRef::output_by_identifier(StringRef identifier) const
-{
-  const int index = output_index_by_identifier_->lookup_as(identifier);
-  return this->output(index);
-}
-
-inline bNode *NodeRef::bnode() const
-{
-  return bnode_;
-}
-
-inline bNodeTree *NodeRef::btree() const
-{
-  return tree_->btree();
-}
-
-inline StringRefNull NodeRef::idname() const
-{
-  return bnode_->idname;
-}
-
-inline StringRefNull NodeRef::name() const
-{
-  return bnode_->name;
-}
-
-inline StringRefNull NodeRef::label() const
-{
-  return bnode_->label;
-}
-
-inline StringRefNull NodeRef::label_or_name() const
-{
-  const StringRefNull label = this->label();
-  if (!label.is_empty()) {
-    return label;
-  }
-  return this->name();
-}
-
-inline bNodeType *NodeRef::typeinfo() const
-{
-  return bnode_->typeinfo;
-}
-
-/* Returns a pointer because not all nodes have declarations currently. */
-inline const NodeDeclaration *NodeRef::declaration() const
-{
-  nodeDeclarationEnsure(this->tree().btree(), bnode_);
-  return bnode_->runtime->declaration;
-}
-
-inline int NodeRef::id() const
-{
-  return id_;
-}
-
-inline bool NodeRef::is_reroute_node() const
-{
-  return bnode_->type == NODE_REROUTE;
-}
-
-inline bool NodeRef::is_group_node() const
-{
-  return bnode_->type == NODE_GROUP || bnode_->type == NODE_CUSTOM_GROUP;
-}
-
-inline bool NodeRef::is_group_input_node() const
-{
-  return bnode_->type == NODE_GROUP_INPUT;
-}
-
-inline bool NodeRef::is_group_output_node() const
-{
-  return bnode_->type == NODE_GROUP_OUTPUT;
-}
-
-inline bool NodeRef::is_frame() const
-{
-  return bnode_->type == NODE_FRAME;
-}
-
-inline bool NodeRef::is_undefined() const
-{
-  return bnode_->typeinfo == &NodeTypeUndefined;
-}
-
-inline bool NodeRef::is_muted() const
-{
-  return (bnode_->flag & NODE_MUTED) != 0;
-}
-
-inline void *NodeRef::storage() const
-{
-  return bnode_->storage;
-}
-
-template<typename T> inline T *NodeRef::storage() const
-{
-  return (T *)bnode_->storage;
-}
-
-/** \} */
-
-/* -------------------------------------------------------------------- */
-/** \name #LinkRef Inline Methods
- * \{ */
-
-inline const OutputSocketRef &LinkRef::from() const
-{
-  return *from_;
-}
-
-inline const InputSocketRef &LinkRef::to() const
-{
-  return *to_;
-}
-
-inline bNodeLink *LinkRef::blink() const
-{
-  return blink_;
-}
-
-inline bool LinkRef::is_muted() const
-{
-  return blink_->flag & NODE_LINK_MUTED;
-}
-
-/** \} */
-
-/* -------------------------------------------------------------------- */
-/** \name #InternalLinkRef Inline Methods
- * \{ */
-
-inline const InputSocketRef &InternalLinkRef::from() const
-{
-  return *from_;
-}
-
-inline const OutputSocketRef &InternalLinkRef::to() const
-{
-  return *to_;
-}
-
-inline bNodeLink *InternalLinkRef::blink() const
-{
-  return blink_;
-}
-
-/** \} */
-
-/* -------------------------------------------------------------------- */
-/** \name #NodeTreeRef Inline Methods
- * \{ */
-
-inline Span<const NodeRef *> NodeTreeRef::nodes() const
-{
-  return nodes_by_id_;
-}
-
-inline Span<const NodeRef *> NodeTreeRef::nodes_by_type(StringRefNull idname) const
-{
-  const bNodeType *nodetype = nodeTypeFind(idname.c_str());
-  return this->nodes_by_type(nodetype);
-}
-
-inline Span<const NodeRef *> NodeTreeRef::nodes_by_type(const bNodeType *nodetype) const
-{
-  return nodes_by_type_.lookup(nodetype);
-}
-
-inline Span<const SocketRef *> NodeTreeRef::sockets() const
-{
-  return sockets_by_id_;
-}
-
-inline Span<const InputSocketRef *> NodeTreeRef::input_sockets() const
-{
-  return input_sockets_;
-}
-
-inline Span<const OutputSocketRef *> NodeTreeRef::output_sockets() const
-{
-  return output_sockets_;
-}
-
-inline Span<const LinkRef *> NodeTreeRef::links() const
-{
-  return links_;
-}
-
-inline const NodeRef *NodeTreeRef::group_output_node() const
-{
-  return group_output_node_;
-}
-
-inline bNodeTree *NodeTreeRef::btree() const
-{
-  return btree_;
-}
-
-inline StringRefNull NodeTreeRef::name() const
-{
-  return btree_->id.name + 2;
-}
-
-/** \} */
-
-}  // namespace blender::nodes
diff --git a/source/blender/nodes/NOD_shader.h b/source/blender/nodes/NOD_shader.h
index 1d1310360b8..8fe77bffaad 100644
--- a/source/blender/nodes/NOD_shader.h
+++ b/source/blender/nodes/NOD_shader.h
@@ -26,6 +26,7 @@ void register_node_type_sh_camera(void);
 void register_node_type_sh_value(void);
 void register_node_type_sh_rgb(void);
 void register_node_type_sh_mix_rgb(void);
+void register_node_type_sh_mix(void);
 void register_node_type_sh_valtorgb(void);
 void register_node_type_sh_rgbtobw(void);
 void register_node_type_sh_shadertorgb(void);
diff --git a/source/blender/nodes/NOD_static_types.h b/source/blender/nodes/NOD_static_types.h
index 786ce88152e..e6cdd462c66 100644
--- a/source/blender/nodes/NOD_static_types.h
+++ b/source/blender/nodes/NOD_static_types.h
@@ -25,7 +25,7 @@ DefNode(Node,           NODE_REROUTE,            0,                      "REROUT
 
 DefNode(ShaderNode,     SH_NODE_RGB,             0,                      "RGB",            RGB,              "RGB",               "A color picker")
 DefNode(ShaderNode,     SH_NODE_VALUE,           0,                      "VALUE",          Value,            "Value",             "Used to Input numerical values to other nodes in the tree")
-DefNode(ShaderNode,     SH_NODE_MIX_RGB,         def_mix_rgb,            "MIX_RGB",        MixRGB,           "MixRGB",            "Mix two input colors")
+DefNode(ShaderNode,     SH_NODE_MIX_RGB_LEGACY,  def_mix_rgb,            "MIX_RGB",        MixRGB,           "MixRGB",            "Mix two input colors")
 DefNode(ShaderNode,     SH_NODE_VALTORGB,        def_colorramp,          "VALTORGB",       ValToRGB,         "ColorRamp",         "Map values to colors with the use of a gradient")
 DefNode(ShaderNode,     SH_NODE_RGBTOBW,         0,                      "RGBTOBW",        RGBToBW,          "RGB to BW",         "Convert a color's luminance to a grayscale value")
 DefNode(ShaderNode,     SH_NODE_SHADERTORGB,     0,                      "SHADERTORGB",    ShaderToRGB,      "Shader to RGB",     "Convert rendering effect (such as light and shadow) to color. Typically used for non-photorealistic rendering, to apply additional effects on the output of BSDFs.\nNote: only supported for Eevee")
@@ -122,6 +122,7 @@ DefNode(ShaderNode,     SH_NODE_OUTPUT_AOV,         def_sh_output_aov,      "OUT
 DefNode(ShaderNode,     SH_NODE_CURVE_FLOAT,        def_float_curve,        "CURVE_FLOAT",        FloatCurve,       "Float Curve",       "Map an input float to a curve and outputs a float value")
 DefNode(ShaderNode,     SH_NODE_COMBINE_COLOR,      def_sh_combsep_color,   "COMBINE_COLOR",      CombineColor,     "Combine Color",     "Create a color from individual components using multiple models")
 DefNode(ShaderNode,     SH_NODE_SEPARATE_COLOR,     def_sh_combsep_color,   "SEPARATE_COLOR",     SeparateColor,    "Separate Color",    "Split a color into its individual components using multiple models")
+DefNode(ShaderNode,     SH_NODE_MIX,                def_sh_mix,             "MIX",                Mix,              "Mix",               "Mix values by a factor")
 
 DefNode(CompositorNode, CMP_NODE_VIEWER,         def_cmp_viewer,         "VIEWER",         Viewer,           "Viewer",            ""              )
 DefNode(CompositorNode, CMP_NODE_RGB,            0,                      "RGB",            RGB,              "RGB",               ""              )
diff --git a/source/blender/nodes/composite/nodes/node_composite_image.cc b/source/blender/nodes/composite/nodes/node_composite_image.cc
index d8852e9333f..b6bd263b150 100644
--- a/source/blender/nodes/composite/nodes/node_composite_image.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_image.cc
@@ -457,8 +457,8 @@ class ImageOperation : public NodeOperation {
 
     update_image_frame_number();
 
-    for (const OutputSocketRef *output : node()->outputs()) {
-      compute_output(output->identifier());
+    for (const bNodeSocket *output : this->node()->output_sockets()) {
+      compute_output(output->identifier);
     }
   }
 
@@ -488,12 +488,12 @@ class ImageOperation : public NodeOperation {
   /* Allocate all needed outputs as invalid. This should be called when is_valid returns false. */
   void allocate_invalid()
   {
-    for (const OutputSocketRef *output : node()->outputs()) {
-      if (!should_compute_output(output->identifier())) {
+    for (const bNodeSocket *output : this->node()->output_sockets()) {
+      if (!should_compute_output(output->identifier)) {
         continue;
       }
 
-      Result &result = get_result(output->identifier());
+      Result &result = get_result(output->identifier);
       result.allocate_invalid();
     }
   }
@@ -594,7 +594,7 @@ class ImageOperation : public NodeOperation {
   const char *get_pass_name(StringRef identifier)
   {
     DOutputSocket output = node().output_by_identifier(identifier);
-    return static_cast<NodeImageLayer *>(output->bsocket()->storage)->pass_name;
+    return static_cast<NodeImageLayer *>(output->storage)->pass_name;
   }
 
   /* Get the index of the pass with the given name in the selected render layer's passes list
@@ -850,9 +850,9 @@ class RenderLayerOperation : public NodeOperation {
     alpha_result.unbind_as_image();
 
     /* Other output passes are not supported for now, so allocate them as invalid. */
-    for (const OutputSocketRef *output : node()->outputs()) {
-      if (output->identifier() != "Image" && output->identifier() != "Alpha") {
-        get_result(output->identifier()).allocate_invalid();
+    for (const bNodeSocket *output : this->node()->output_sockets()) {
+      if (!STREQ(output->identifier, "Image") && !STREQ(output->identifier, "Alpha")) {
+        get_result(output->identifier).allocate_invalid();
       }
     }
   }
diff --git a/source/blender/nodes/composite/nodes/node_composite_normal.cc b/source/blender/nodes/composite/nodes/node_composite_normal.cc
index f61ace01cfd..a1a6303e21b 100644
--- a/source/blender/nodes/composite/nodes/node_composite_normal.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_normal.cc
@@ -51,9 +51,12 @@ class NormalShaderNode : public ShaderNode {
   }
 
   /* The vector value is stored in the default value of the output socket. */
-  float *get_vector_value()
+  const float *get_vector_value()
   {
-    return node().output_by_identifier("Normal")->default_value<bNodeSocketValueVector>()->value;
+    return node()
+        .output_by_identifier("Normal")
+        ->default_value_typed<bNodeSocketValueVector>()
+        ->value;
   }
 };
 
diff --git a/source/blender/nodes/function/node_function_util.hh b/source/blender/nodes/function/node_function_util.hh
index fd0b6c31b1d..059b2f9bc17 100644
--- a/source/blender/nodes/function/node_function_util.hh
+++ b/source/blender/nodes/function/node_function_util.hh
@@ -23,4 +23,6 @@
 
 #include "FN_multi_function_builder.hh"
 
+#include "RNA_access.h"
+
 void fn_node_type_base(struct bNodeType *ntype, int type, const char *name, short nclass);
diff --git a/source/blender/nodes/function/nodes/node_fn_align_euler_to_vector.cc b/source/blender/nodes/function/nodes/node_fn_align_euler_to_vector.cc
index 7d08d57c503..e5c89567d44 100644
--- a/source/blender/nodes/function/nodes/node_fn_align_euler_to_vector.cc
+++ b/source/blender/nodes/function/nodes/node_fn_align_euler_to_vector.cc
@@ -190,7 +190,7 @@ class MF_AlignEulerToVector : public fn::MultiFunction {
 
 static void fn_node_align_euler_to_vector_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &node = builder.node();
+  const bNode &node = builder.node();
   builder.construct_and_set_matching_fn<MF_AlignEulerToVector>(node.custom1, node.custom2);
 }
 
diff --git a/source/blender/nodes/function/nodes/node_fn_boolean_math.cc b/source/blender/nodes/function/nodes/node_fn_boolean_math.cc
index b6d7e6c9a5f..5fc28509a49 100644
--- a/source/blender/nodes/function/nodes/node_fn_boolean_math.cc
+++ b/source/blender/nodes/function/nodes/node_fn_boolean_math.cc
@@ -68,7 +68,7 @@ static void node_gather_link_searches(GatherLinkSearchOpParams &params)
   }
 }
 
-static const fn::MultiFunction *get_multi_function(bNode &bnode)
+static const fn::MultiFunction *get_multi_function(const bNode &bnode)
 {
   static auto exec_preset = fn::CustomMF_presets::AllSpanOrSingle();
   static fn::CustomMF_SI_SI_SO<bool, bool, bool> and_fn{
diff --git a/source/blender/nodes/function/nodes/node_fn_combine_color.cc b/source/blender/nodes/function/nodes/node_fn_combine_color.cc
index c5fd3ce38a1..450cd166e78 100644
--- a/source/blender/nodes/function/nodes/node_fn_combine_color.cc
+++ b/source/blender/nodes/function/nodes/node_fn_combine_color.cc
@@ -49,7 +49,7 @@ static void fn_node_combine_color_init(bNodeTree *UNUSED(tree), bNode *node)
   node->storage = data;
 }
 
-static const fn::MultiFunction *get_multi_function(bNode &bnode)
+static const fn::MultiFunction *get_multi_function(const bNode &bnode)
 {
   const NodeCombSepColor &storage = node_storage(bnode);
 
diff --git a/source/blender/nodes/function/nodes/node_fn_compare.cc b/source/blender/nodes/function/nodes/node_fn_compare.cc
index e3f13dc7d6b..122d1a3c93e 100644
--- a/source/blender/nodes/function/nodes/node_fn_compare.cc
+++ b/source/blender/nodes/function/nodes/node_fn_compare.cc
@@ -167,7 +167,7 @@ static float component_average(float3 a)
   return (a.x + a.y + a.z) / 3.0f;
 }
 
-static const fn::MultiFunction *get_multi_function(bNode &node)
+static const fn::MultiFunction *get_multi_function(const bNode &node)
 {
   const NodeFunctionCompare *data = (NodeFunctionCompare *)node.storage;
 
diff --git a/source/blender/nodes/function/nodes/node_fn_float_to_int.cc b/source/blender/nodes/function/nodes/node_fn_float_to_int.cc
index 9c9d8620a7e..aad2f532d20 100644
--- a/source/blender/nodes/function/nodes/node_fn_float_to_int.cc
+++ b/source/blender/nodes/function/nodes/node_fn_float_to_int.cc
@@ -39,7 +39,7 @@ static void node_float_to_int_label(const bNodeTree *UNUSED(ntree),
   BLI_strncpy(label, IFACE_(name), maxlen);
 }
 
-static const fn::MultiFunction *get_multi_function(bNode &bnode)
+static const fn::MultiFunction *get_multi_function(const bNode &bnode)
 {
   static auto exec_preset = fn::CustomMF_presets::AllSpanOrSingle();
   static fn::CustomMF_SI_SO<float, int> round_fn{
diff --git a/source/blender/nodes/function/nodes/node_fn_input_bool.cc b/source/blender/nodes/function/nodes/node_fn_input_bool.cc
index 5ced719627f..717f4d1ac6b 100644
--- a/source/blender/nodes/function/nodes/node_fn_input_bool.cc
+++ b/source/blender/nodes/function/nodes/node_fn_input_bool.cc
@@ -22,7 +22,7 @@ static void fn_node_input_bool_layout(uiLayout *layout, bContext *UNUSED(C), Poi
 
 static void fn_node_input_bool_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   NodeInputBool *node_storage = static_cast<NodeInputBool *>(bnode.storage);
   builder.construct_and_set_matching_fn<fn::CustomMF_Constant<bool>>(node_storage->boolean);
 }
diff --git a/source/blender/nodes/function/nodes/node_fn_input_color.cc b/source/blender/nodes/function/nodes/node_fn_input_color.cc
index 46787f7575d..cdad1542c66 100644
--- a/source/blender/nodes/function/nodes/node_fn_input_color.cc
+++ b/source/blender/nodes/function/nodes/node_fn_input_color.cc
@@ -23,7 +23,7 @@ static void fn_node_input_color_layout(uiLayout *layout, bContext *UNUSED(C), Po
 static void fn_node_input_color_build_multi_function(
     blender::nodes::NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   NodeInputColor *node_storage = static_cast<NodeInputColor *>(bnode.storage);
   blender::ColorGeometry4f color = (ColorGeometry4f)node_storage->color;
   builder.construct_and_set_matching_fn<blender::fn::CustomMF_Constant<ColorGeometry4f>>(color);
diff --git a/source/blender/nodes/function/nodes/node_fn_input_int.cc b/source/blender/nodes/function/nodes/node_fn_input_int.cc
index 1e5dcd5ae7a..16506b5f9b8 100644
--- a/source/blender/nodes/function/nodes/node_fn_input_int.cc
+++ b/source/blender/nodes/function/nodes/node_fn_input_int.cc
@@ -22,7 +22,7 @@ static void fn_node_input_int_layout(uiLayout *layout, bContext *UNUSED(C), Poin
 
 static void fn_node_input_int_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   NodeInputInt *node_storage = static_cast<NodeInputInt *>(bnode.storage);
   builder.construct_and_set_matching_fn<fn::CustomMF_Constant<int>>(node_storage->integer);
 }
diff --git a/source/blender/nodes/function/nodes/node_fn_input_string.cc b/source/blender/nodes/function/nodes/node_fn_input_string.cc
index 124a8572f78..129d19f4f04 100644
--- a/source/blender/nodes/function/nodes/node_fn_input_string.cc
+++ b/source/blender/nodes/function/nodes/node_fn_input_string.cc
@@ -20,7 +20,7 @@ static void fn_node_input_string_layout(uiLayout *layout, bContext *UNUSED(C), P
 
 static void fn_node_input_string_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   NodeInputString *node_storage = static_cast<NodeInputString *>(bnode.storage);
   std::string string = std::string((node_storage->string) ? node_storage->string : "");
   builder.construct_and_set_matching_fn<fn::CustomMF_Constant<std::string>>(std::move(string));
diff --git a/source/blender/nodes/function/nodes/node_fn_input_vector.cc b/source/blender/nodes/function/nodes/node_fn_input_vector.cc
index 898c19e92f0..de894a4038d 100644
--- a/source/blender/nodes/function/nodes/node_fn_input_vector.cc
+++ b/source/blender/nodes/function/nodes/node_fn_input_vector.cc
@@ -22,7 +22,7 @@ static void fn_node_input_vector_layout(uiLayout *layout, bContext *UNUSED(C), P
 
 static void fn_node_input_vector_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   NodeInputVector *node_storage = static_cast<NodeInputVector *>(bnode.storage);
   float3 vector(node_storage->vector);
   builder.construct_and_set_matching_fn<fn::CustomMF_Constant<float3>>(vector);
diff --git a/source/blender/nodes/function/nodes/node_fn_rotate_euler.cc b/source/blender/nodes/function/nodes/node_fn_rotate_euler.cc
index a4fc1a6bfd1..299c0f7a932 100644
--- a/source/blender/nodes/function/nodes/node_fn_rotate_euler.cc
+++ b/source/blender/nodes/function/nodes/node_fn_rotate_euler.cc
@@ -52,7 +52,7 @@ static void fn_node_rotate_euler_layout(uiLayout *layout, bContext *UNUSED(C), P
   uiItemR(layout, ptr, "space", UI_ITEM_R_EXPAND, nullptr, ICON_NONE);
 }
 
-static const fn::MultiFunction *get_multi_function(bNode &bnode)
+static const fn::MultiFunction *get_multi_function(const bNode &bnode)
 {
   static fn::CustomMF_SI_SI_SO<float3, float3, float3> obj_euler_rot{
       "Rotate Euler by Euler/Object", [](const float3 &input, const float3 &rotation) {
diff --git a/source/blender/nodes/geometry/node_geometry_util.hh b/source/blender/nodes/geometry/node_geometry_util.hh
index a4af608a40e..4db4d8bb097 100644
--- a/source/blender/nodes/geometry/node_geometry_util.hh
+++ b/source/blender/nodes/geometry/node_geometry_util.hh
@@ -20,6 +20,8 @@
 #include "NOD_socket_declarations.hh"
 #include "NOD_socket_declarations_geometry.hh"
 
+#include "RNA_access.h"
+
 #include "node_util.h"
 
 void geo_node_type_base(struct bNodeType *ntype, int type, const char *name, short nclass);
diff --git a/source/blender/nodes/geometry/nodes/node_geo_curve_endpoint_selection.cc b/source/blender/nodes/geometry/nodes/node_geo_curve_endpoint_selection.cc
index 8c3e97edac0..28d979facac 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_curve_endpoint_selection.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_curve_endpoint_selection.cc
@@ -64,12 +64,12 @@ class EndpointFieldInput final : public bke::CurvesFieldInput {
     devirtualize_varray2(start_size, end_size, [&](const auto &start_size, const auto &end_size) {
       threading::parallel_for(curves.curves_range(), 1024, [&](IndexRange curves_range) {
         for (const int i : curves_range) {
-          const IndexRange range = curves.points_for_curve(i);
+          const IndexRange points = curves.points_for_curve(i);
           const int start = std::max(start_size[i], 0);
           const int end = std::max(end_size[i], 0);
 
-          selection_span.slice(range.take_front(start)).fill(true);
-          selection_span.slice(range.take_back(end)).fill(true);
+          selection_span.slice(points.take_front(start)).fill(true);
+          selection_span.slice(points.take_back(end)).fill(true);
         }
       });
     });
diff --git a/source/blender/nodes/geometry/nodes/node_geo_points.cc b/source/blender/nodes/geometry/nodes/node_geo_points.cc
index dd32e6714f4..e0ba1f1c810 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_points.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_points.cc
@@ -69,10 +69,8 @@ static void node_geo_exec(GeoNodeExecParams params)
   Field<float3> position_field = params.extract_input<Field<float3>>("Position");
   Field<float> radius_field = params.extract_input<Field<float>>("Radius");
 
-  PointCloud *new_point_cloud = BKE_pointcloud_new_nomain(count);
-  GeometrySet geometry_set = GeometrySet::create_with_pointcloud(new_point_cloud);
-  PointCloudComponent &points = geometry_set.get_component_for_write<PointCloudComponent>();
-  MutableAttributeAccessor attributes = *points.attributes_for_write();
+  PointCloud *points = BKE_pointcloud_new_nomain(count);
+  MutableAttributeAccessor attributes = bke::pointcloud_attributes_for_write(*points);
   AttributeWriter<float3> output_position = attributes.lookup_or_add_for_write<float3>(
       "position", ATTR_DOMAIN_POINT);
   AttributeWriter<float> output_radii = attributes.lookup_or_add_for_write<float>(
@@ -86,7 +84,7 @@ static void node_geo_exec(GeoNodeExecParams params)
 
   output_position.finish();
   output_radii.finish();
-  params.set_output("Geometry", std::move(geometry_set));
+  params.set_output("Geometry", GeometrySet::create_with_pointcloud(points));
 }
 
 }  // namespace blender::nodes::node_geo_points_cc
diff --git a/source/blender/nodes/geometry/nodes/node_geo_store_named_attribute.cc b/source/blender/nodes/geometry/nodes/node_geo_store_named_attribute.cc
index 9719833097e..c2d6f57ce8a 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_store_named_attribute.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_store_named_attribute.cc
@@ -123,7 +123,7 @@ static void try_capture_field_on_geometry(GeometryComponent &component,
     }
   }
   attributes.remove(name);
-  if (attributes.add(name, domain, data_type, bke::AttributeInitMove{buffer})) {
+  if (attributes.add(name, domain, data_type, bke::AttributeInitMoveArray{buffer})) {
     return;
   }
 
diff --git a/source/blender/nodes/geometry/nodes/node_geo_subdivision_surface.cc b/source/blender/nodes/geometry/nodes/node_geo_subdivision_surface.cc
index f1fb9ce5563..60c8a89a6bf 100644
--- a/source/blender/nodes/geometry/nodes/node_geo_subdivision_surface.cc
+++ b/source/blender/nodes/geometry/nodes/node_geo_subdivision_surface.cc
@@ -73,7 +73,7 @@ static void write_vertex_creases(Mesh &mesh, const VArray<float> &crease_varray)
   }
   else {
     crease = static_cast<float *>(
-        CustomData_add_layer(&mesh.vdata, CD_CREASE, CD_DEFAULT, nullptr, mesh.totvert));
+        CustomData_add_layer(&mesh.vdata, CD_CREASE, CD_CONSTRUCT, nullptr, mesh.totvert));
   }
   materialize_and_clamp_creases(crease_varray, {crease, mesh.totvert});
 }
diff --git a/source/blender/nodes/intern/derived_node_tree.cc b/source/blender/nodes/intern/derived_node_tree.cc
index e589da09b16..e8e0f0fa61c 100644
--- a/source/blender/nodes/intern/derived_node_tree.cc
+++ b/source/blender/nodes/intern/derived_node_tree.cc
@@ -2,38 +2,38 @@
 
 #include "NOD_derived_node_tree.hh"
 
+#include "BKE_node.h"
+
 #include "BLI_dot_export.hh"
 
 namespace blender::nodes {
 
-DerivedNodeTree::DerivedNodeTree(bNodeTree &btree, NodeTreeRefMap &node_tree_refs)
+DerivedNodeTree::DerivedNodeTree(const bNodeTree &btree)
 {
   /* Construct all possible contexts immediately. This is significantly cheaper than inlining all
    * node groups. If it still becomes a performance issue in the future, contexts could be
    * constructed lazily when they are needed. */
-  root_context_ = &this->construct_context_recursively(nullptr, nullptr, btree, node_tree_refs);
+  root_context_ = &this->construct_context_recursively(nullptr, nullptr, btree);
 }
 
 DTreeContext &DerivedNodeTree::construct_context_recursively(DTreeContext *parent_context,
-                                                             const NodeRef *parent_node,
-                                                             bNodeTree &btree,
-                                                             NodeTreeRefMap &node_tree_refs)
+                                                             const bNode *parent_node,
+                                                             const bNodeTree &btree)
 {
+  btree.ensure_topology_cache();
   DTreeContext &context = *allocator_.construct<DTreeContext>().release();
   context.parent_context_ = parent_context;
   context.parent_node_ = parent_node;
   context.derived_tree_ = this;
-  context.tree_ = &get_tree_ref_from_map(node_tree_refs, btree);
-  used_node_tree_refs_.add(context.tree_);
+  context.btree_ = &btree;
+  used_btrees_.add(context.btree_);
 
-  for (const NodeRef *node : context.tree_->nodes()) {
-    if (node->is_group_node()) {
-      bNode *bnode = node->bnode();
+  for (const bNode *bnode : context.btree_->all_nodes()) {
+    if (bnode->is_group()) {
       bNodeTree *child_btree = reinterpret_cast<bNodeTree *>(bnode->id);
       if (child_btree != nullptr) {
-        DTreeContext &child = this->construct_context_recursively(
-            &context, node, *child_btree, node_tree_refs);
-        context.children_.add_new(node, &child);
+        DTreeContext &child = this->construct_context_recursively(&context, bnode, *child_btree);
+        context.children_.add_new(bnode, &child);
       }
     }
   }
@@ -57,8 +57,8 @@ void DerivedNodeTree::destruct_context_recursively(DTreeContext *context)
 
 bool DerivedNodeTree::has_link_cycles() const
 {
-  for (const NodeTreeRef *tree_ref : used_node_tree_refs_) {
-    if (tree_ref->has_link_cycles()) {
+  for (const bNodeTree *btree : used_btrees_) {
+    if (btree->has_link_cycle()) {
       return true;
     }
   }
@@ -67,8 +67,8 @@ bool DerivedNodeTree::has_link_cycles() const
 
 bool DerivedNodeTree::has_undefined_nodes_or_sockets() const
 {
-  for (const NodeTreeRef *tree_ref : used_node_tree_refs_) {
-    if (tree_ref->has_undefined_nodes_or_sockets()) {
+  for (const bNodeTree *btree : used_btrees_) {
+    if (btree->has_undefined_nodes_or_sockets()) {
       return true;
     }
   }
@@ -83,8 +83,8 @@ void DerivedNodeTree::foreach_node(FunctionRef<void(DNode)> callback) const
 void DerivedNodeTree::foreach_node_in_context_recursive(const DTreeContext &context,
                                                         FunctionRef<void(DNode)> callback) const
 {
-  for (const NodeRef *node_ref : context.tree_->nodes()) {
-    callback(DNode(&context, node_ref));
+  for (const bNode *bnode : context.btree_->all_nodes()) {
+    callback(DNode(&context, bnode));
   }
   for (const DTreeContext *child_context : context.children_.values()) {
     this->foreach_node_in_context_recursive(*child_context, callback);
@@ -94,32 +94,32 @@ void DerivedNodeTree::foreach_node_in_context_recursive(const DTreeContext &cont
 DOutputSocket DInputSocket::get_corresponding_group_node_output() const
 {
   BLI_assert(*this);
-  BLI_assert(socket_ref_->node().is_group_output_node());
-  BLI_assert(socket_ref_->index() < socket_ref_->node().inputs().size() - 1);
+  BLI_assert(bsocket_->owner_node().is_group_output());
+  BLI_assert(bsocket_->index() < bsocket_->owner_node().input_sockets().size() - 1);
 
   const DTreeContext *parent_context = context_->parent_context();
-  const NodeRef *parent_node = context_->parent_node();
+  const bNode *parent_node = context_->parent_node();
   BLI_assert(parent_context != nullptr);
   BLI_assert(parent_node != nullptr);
 
-  const int socket_index = socket_ref_->index();
-  return {parent_context, &parent_node->output(socket_index)};
+  const int socket_index = bsocket_->index();
+  return {parent_context, &parent_node->output_socket(socket_index)};
 }
 
 Vector<DOutputSocket> DInputSocket::get_corresponding_group_input_sockets() const
 {
   BLI_assert(*this);
-  BLI_assert(socket_ref_->node().is_group_node());
+  BLI_assert(bsocket_->owner_node().is_group());
 
-  const DTreeContext *child_context = context_->child_context(socket_ref_->node());
+  const DTreeContext *child_context = context_->child_context(bsocket_->owner_node());
   BLI_assert(child_context != nullptr);
 
-  const NodeTreeRef &child_tree = child_context->tree();
-  Span<const NodeRef *> group_input_nodes = child_tree.nodes_by_type("NodeGroupInput");
-  const int socket_index = socket_ref_->index();
+  const bNodeTree &child_tree = child_context->btree();
+  Span<const bNode *> group_input_nodes = child_tree.nodes_by_type("NodeGroupInput");
+  const int socket_index = bsocket_->index();
   Vector<DOutputSocket> sockets;
-  for (const NodeRef *group_input_node : group_input_nodes) {
-    sockets.append(DOutputSocket(child_context, &group_input_node->output(socket_index)));
+  for (const bNode *group_input_node : group_input_nodes) {
+    sockets.append(DOutputSocket(child_context, &group_input_node->output_socket(socket_index)));
   }
   return sockets;
 }
@@ -127,36 +127,36 @@ Vector<DOutputSocket> DInputSocket::get_corresponding_group_input_sockets() cons
 DInputSocket DOutputSocket::get_corresponding_group_node_input() const
 {
   BLI_assert(*this);
-  BLI_assert(socket_ref_->node().is_group_input_node());
-  BLI_assert(socket_ref_->index() < socket_ref_->node().outputs().size() - 1);
+  BLI_assert(bsocket_->owner_node().is_group_input());
+  BLI_assert(bsocket_->index() < bsocket_->owner_node().output_sockets().size() - 1);
 
   const DTreeContext *parent_context = context_->parent_context();
-  const NodeRef *parent_node = context_->parent_node();
+  const bNode *parent_node = context_->parent_node();
   BLI_assert(parent_context != nullptr);
   BLI_assert(parent_node != nullptr);
 
-  const int socket_index = socket_ref_->index();
-  return {parent_context, &parent_node->input(socket_index)};
+  const int socket_index = bsocket_->index();
+  return {parent_context, &parent_node->input_socket(socket_index)};
 }
 
 DInputSocket DOutputSocket::get_active_corresponding_group_output_socket() const
 {
   BLI_assert(*this);
-  BLI_assert(socket_ref_->node().is_group_node());
+  BLI_assert(bsocket_->owner_node().is_group());
 
-  const DTreeContext *child_context = context_->child_context(socket_ref_->node());
+  const DTreeContext *child_context = context_->child_context(bsocket_->owner_node());
   if (child_context == nullptr) {
     /* Can happen when the group node references a non-existent group (e.g. when the group is
      * linked but the original file is not found). */
     return {};
   }
 
-  const NodeTreeRef &child_tree = child_context->tree();
-  Span<const NodeRef *> group_output_nodes = child_tree.nodes_by_type("NodeGroupOutput");
-  const int socket_index = socket_ref_->index();
-  for (const NodeRef *group_output_node : group_output_nodes) {
-    if (group_output_node->bnode()->flag & NODE_DO_OUTPUT || group_output_nodes.size() == 1) {
-      return {child_context, &group_output_node->input(socket_index)};
+  const bNodeTree &child_tree = child_context->btree();
+  Span<const bNode *> group_output_nodes = child_tree.nodes_by_type("NodeGroupOutput");
+  const int socket_index = bsocket_->index();
+  for (const bNode *group_output_node : group_output_nodes) {
+    if (group_output_node->flag & NODE_DO_OUTPUT || group_output_nodes.size() == 1) {
+      return {child_context, &group_output_node->input_socket(socket_index)};
     }
   }
   return {};
@@ -165,11 +165,11 @@ DInputSocket DOutputSocket::get_active_corresponding_group_output_socket() const
 void DInputSocket::foreach_origin_socket(FunctionRef<void(DSocket)> origin_fn) const
 {
   BLI_assert(*this);
-  for (const OutputSocketRef *linked_socket : socket_ref_->as_input().logically_linked_sockets()) {
-    const NodeRef &linked_node = linked_socket->node();
+  for (const bNodeSocket *linked_socket : bsocket_->logically_linked_sockets()) {
+    const bNode &linked_node = linked_socket->owner_node();
     DOutputSocket linked_dsocket{context_, linked_socket};
 
-    if (linked_node.is_group_input_node()) {
+    if (linked_node.is_group_input()) {
       if (context_->is_root()) {
         /* This is a group input in the root node group. */
         origin_fn(linked_dsocket);
@@ -187,7 +187,7 @@ void DInputSocket::foreach_origin_socket(FunctionRef<void(DSocket)> origin_fn) c
         }
       }
     }
-    else if (linked_node.is_group_node()) {
+    else if (linked_node.is_group()) {
       DInputSocket socket_in_group = linked_dsocket.get_active_corresponding_group_output_socket();
       if (socket_in_group) {
         if (socket_in_group->is_logically_linked()) {
@@ -217,16 +217,16 @@ void DOutputSocket::foreach_target_socket(ForeachTargetSocketFn target_fn) const
 void DOutputSocket::foreach_target_socket(ForeachTargetSocketFn target_fn,
                                           TargetSocketPathInfo &path_info) const
 {
-  for (const LinkRef *link : socket_ref_->as_output().directly_linked_links()) {
+  for (const bNodeLink *link : bsocket_->directly_linked_links()) {
     if (link->is_muted()) {
       continue;
     }
-    const DInputSocket &linked_socket{context_, &link->to()};
+    const DInputSocket &linked_socket{context_, link->tosock};
     if (!linked_socket->is_available()) {
       continue;
     }
     const DNode linked_node = linked_socket.node();
-    if (linked_node->is_reroute_node()) {
+    if (linked_node->is_reroute()) {
       const DInputSocket reroute_input = linked_socket;
       const DOutputSocket reroute_output = linked_node.output(0);
       path_info.sockets.append(reroute_input);
@@ -236,18 +236,18 @@ void DOutputSocket::foreach_target_socket(ForeachTargetSocketFn target_fn,
       path_info.sockets.pop_last();
     }
     else if (linked_node->is_muted()) {
-      for (const InternalLinkRef *internal_link : linked_node->internal_links()) {
-        if (&internal_link->from() != linked_socket.socket_ref()) {
+      for (const bNodeLink *internal_link : linked_node->internal_links_span()) {
+        if (internal_link->fromsock != linked_socket.bsocket()) {
           continue;
         }
         /* The internal link only forwards the first incoming link. */
-        if (linked_socket->is_multi_input_socket()) {
+        if (linked_socket->is_multi_input()) {
           if (linked_socket->directly_linked_links()[0] != link) {
             continue;
           }
         }
         const DInputSocket mute_input = linked_socket;
-        const DOutputSocket mute_output{context_, &internal_link->to()};
+        const DOutputSocket mute_output{context_, internal_link->tosock};
         path_info.sockets.append(mute_input);
         path_info.sockets.append(mute_output);
         mute_output.foreach_target_socket(target_fn, path_info);
@@ -255,8 +255,8 @@ void DOutputSocket::foreach_target_socket(ForeachTargetSocketFn target_fn,
         path_info.sockets.pop_last();
       }
     }
-    else if (linked_node->is_group_output_node()) {
-      if (linked_node.node_ref() != context_->tree().group_output_node()) {
+    else if (linked_node->is_group_output()) {
+      if (linked_node.bnode() != context_->btree().group_output_node()) {
         continue;
       }
       if (context_->is_root()) {
@@ -276,7 +276,7 @@ void DOutputSocket::foreach_target_socket(ForeachTargetSocketFn target_fn,
         path_info.sockets.pop_last();
       }
     }
-    else if (linked_node->is_group_node()) {
+    else if (linked_node->is_group()) {
       /* Follow the links within the nested node group. */
       path_info.sockets.append(linked_socket);
       const Vector<DOutputSocket> sockets_in_group =
@@ -310,7 +310,8 @@ static dot::Cluster *get_dot_cluster_for_context(
     }
     dot::Cluster *parent_cluster = get_dot_cluster_for_context(
         digraph, parent_context, dot_clusters);
-    std::string cluster_name = context->tree().name() + " / " + context->parent_node()->name();
+    std::string cluster_name = StringRef(context->btree().id.name + 2) + " / " +
+                               context->parent_node()->name;
     dot::Cluster &cluster = digraph.new_cluster(cluster_name);
     cluster.set_parent_cluster(parent_cluster);
     return &cluster;
@@ -328,11 +329,11 @@ std::string DerivedNodeTree::to_dot() const
 
   this->foreach_node([&](DNode node) {
     /* Ignore nodes that should not show up in the final output. */
-    if (node->is_muted() || node->is_group_node() || node->is_reroute_node() || node->is_frame()) {
+    if (node->is_muted() || node->is_group() || node->is_reroute() || node->is_frame()) {
       return;
     }
     if (!node.context()->is_root()) {
-      if (node->is_group_input_node() || node->is_group_output_node()) {
+      if (node->is_group_input() || node->is_group_output()) {
         return;
       }
     }
@@ -345,22 +346,22 @@ std::string DerivedNodeTree::to_dot() const
 
     Vector<std::string> input_names;
     Vector<std::string> output_names;
-    for (const InputSocketRef *socket : node->inputs()) {
+    for (const bNodeSocket *socket : node->input_sockets()) {
       if (socket->is_available()) {
-        input_names.append(socket->name());
+        input_names.append(socket->name);
       }
     }
-    for (const OutputSocketRef *socket : node->outputs()) {
+    for (const bNodeSocket *socket : node->output_sockets()) {
       if (socket->is_available()) {
-        output_names.append(socket->name());
+        output_names.append(socket->name);
       }
     }
 
     dot::NodeWithSocketsRef dot_node_with_sockets = dot::NodeWithSocketsRef(
-        dot_node, node->name(), input_names, output_names);
+        dot_node, node->name, input_names, output_names);
 
     int input_index = 0;
-    for (const InputSocketRef *socket : node->inputs()) {
+    for (const bNodeSocket *socket : node->input_sockets()) {
       if (socket->is_available()) {
         dot_input_sockets.add_new(DInputSocket{node.context(), socket},
                                   dot_node_with_sockets.input(input_index));
@@ -368,7 +369,7 @@ std::string DerivedNodeTree::to_dot() const
       }
     }
     int output_index = 0;
-    for (const OutputSocketRef *socket : node->outputs()) {
+    for (const bNodeSocket *socket : node->output_sockets()) {
       if (socket->is_available()) {
         dot_output_sockets.add_new(DOutputSocket{node.context(), socket},
                                    dot_node_with_sockets.output(output_index));
@@ -392,7 +393,7 @@ std::string DerivedNodeTree::to_dot() const
         }
       }
       dot::Node &dot_node = *dot_floating_inputs.lookup_or_add_cb(from_socket, [&]() {
-        dot::Node &dot_node = digraph.new_node(from_socket->name());
+        dot::Node &dot_node = digraph.new_node(from_socket->name);
         dot_node.set_background_color("white");
         dot_node.set_shape(dot::Attr_shape::Ellipse);
         dot_node.set_parent_cluster(
diff --git a/source/blender/nodes/intern/geometry_nodes_eval_log.cc b/source/blender/nodes/intern/geometry_nodes_eval_log.cc
index 55930dcb1ee..89bfa5834e8 100644
--- a/source/blender/nodes/intern/geometry_nodes_eval_log.cc
+++ b/source/blender/nodes/intern/geometry_nodes_eval_log.cc
@@ -89,17 +89,17 @@ TreeLog &ModifierLog::lookup_or_add_tree_log(LogByTreeContext &log_by_tree_conte
   destruct_ptr<TreeLog> owned_tree_log = allocator_.construct<TreeLog>();
   tree_log = owned_tree_log.get();
   log_by_tree_context.add_new(&tree_context, tree_log);
-  parent_log.child_logs_.add_new(tree_context.parent_node()->name(), std::move(owned_tree_log));
+  parent_log.child_logs_.add_new(tree_context.parent_node()->name, std::move(owned_tree_log));
   return *tree_log;
 }
 
 NodeLog &ModifierLog::lookup_or_add_node_log(LogByTreeContext &log_by_tree_context, DNode node)
 {
   TreeLog &tree_log = this->lookup_or_add_tree_log(log_by_tree_context, *node.context());
-  NodeLog &node_log = *tree_log.node_logs_.lookup_or_add_cb(node->name(), [&]() {
+  NodeLog &node_log = *tree_log.node_logs_.lookup_or_add_cb(node->name, [&]() {
     destruct_ptr<NodeLog> node_log = allocator_.construct<NodeLog>();
-    node_log->input_logs_.resize(node->inputs().size());
-    node_log->output_logs_.resize(node->outputs().size());
+    node_log->input_logs_.resize(node->input_sockets().size());
+    node_log->output_logs_.resize(node->output_sockets().size());
     return node_log;
   });
   return node_log;
diff --git a/source/blender/nodes/intern/node_geometry_exec.cc b/source/blender/nodes/intern/node_geometry_exec.cc
index c6ebc22c43c..953dce035c2 100644
--- a/source/blender/nodes/intern/node_geometry_exec.cc
+++ b/source/blender/nodes/intern/node_geometry_exec.cc
@@ -38,7 +38,7 @@ void GeoNodeExecParams::check_input_geometry_set(StringRef identifier,
                                                  const GeometrySet &geometry_set) const
 {
   const SocketDeclaration &decl =
-      *provider_->dnode->input_by_identifier(identifier).bsocket()->runtime->declaration;
+      *provider_->dnode->input_by_identifier(identifier).runtime->declaration;
   const decl::Geometry *geo_decl = dynamic_cast<const decl::Geometry *>(&decl);
   if (geo_decl == nullptr) {
     return;
@@ -118,9 +118,9 @@ void GeoNodeExecParams::check_output_geometry_set(const GeometrySet &geometry_se
 
 const bNodeSocket *GeoNodeExecParams::find_available_socket(const StringRef name) const
 {
-  for (const InputSocketRef *socket : provider_->dnode->inputs()) {
-    if (socket->is_available() && socket->name() == name) {
-      return socket->bsocket();
+  for (const bNodeSocket *socket : provider_->dnode->runtime->inputs) {
+    if (socket->is_available() && socket->name == name) {
+      return socket;
     }
   }
 
@@ -140,10 +140,10 @@ void GeoNodeExecParams::set_default_remaining_outputs()
 void GeoNodeExecParams::check_input_access(StringRef identifier,
                                            const CPPType *requested_type) const
 {
-  bNodeSocket *found_socket = nullptr;
-  for (const InputSocketRef *socket : provider_->dnode->inputs()) {
-    if (socket->identifier() == identifier) {
-      found_socket = socket->bsocket();
+  const bNodeSocket *found_socket = nullptr;
+  for (const bNodeSocket *socket : provider_->dnode->input_sockets()) {
+    if (socket->identifier == identifier) {
+      found_socket = socket;
       break;
     }
   }
@@ -151,9 +151,9 @@ void GeoNodeExecParams::check_input_access(StringRef identifier,
   if (found_socket == nullptr) {
     std::cout << "Did not find an input socket with the identifier '" << identifier << "'.\n";
     std::cout << "Possible identifiers are: ";
-    for (const InputSocketRef *socket : provider_->dnode->inputs()) {
+    for (const bNodeSocket *socket : provider_->dnode->input_sockets()) {
       if (socket->is_available()) {
-        std::cout << "'" << socket->identifier() << "', ";
+        std::cout << "'" << socket->identifier << "', ";
       }
     }
     std::cout << "\n";
@@ -182,10 +182,10 @@ void GeoNodeExecParams::check_input_access(StringRef identifier,
 
 void GeoNodeExecParams::check_output_access(StringRef identifier, const CPPType &value_type) const
 {
-  bNodeSocket *found_socket = nullptr;
-  for (const OutputSocketRef *socket : provider_->dnode->outputs()) {
-    if (socket->identifier() == identifier) {
-      found_socket = socket->bsocket();
+  const bNodeSocket *found_socket = nullptr;
+  for (const bNodeSocket *socket : provider_->dnode->output_sockets()) {
+    if (socket->identifier == identifier) {
+      found_socket = socket;
       break;
     }
   }
@@ -193,9 +193,9 @@ void GeoNodeExecParams::check_output_access(StringRef identifier, const CPPType
   if (found_socket == nullptr) {
     std::cout << "Did not find an output socket with the identifier '" << identifier << "'.\n";
     std::cout << "Possible identifiers are: ";
-    for (const OutputSocketRef *socket : provider_->dnode->outputs()) {
-      if (socket->is_available()) {
-        std::cout << "'" << socket->identifier() << "', ";
+    for (const bNodeSocket *socket : provider_->dnode->output_sockets()) {
+      if (!(socket->flag & SOCK_UNAVAIL)) {
+        std::cout << "'" << socket->identifier << "', ";
       }
     }
     std::cout << "\n";
diff --git a/source/blender/nodes/intern/node_multi_function.cc b/source/blender/nodes/intern/node_multi_function.cc
index 13bfdfbfac1..1f8397923e9 100644
--- a/source/blender/nodes/intern/node_multi_function.cc
+++ b/source/blender/nodes/intern/node_multi_function.cc
@@ -2,14 +2,14 @@
 
 #include "NOD_multi_function.hh"
 
+#include "BKE_node.h"
+
 namespace blender::nodes {
 
 NodeMultiFunctions::NodeMultiFunctions(const DerivedNodeTree &tree)
 {
-  for (const NodeTreeRef *tree_ref : tree.used_node_tree_refs()) {
-    bNodeTree *btree = tree_ref->btree();
-    for (const NodeRef *node : tree_ref->nodes()) {
-      bNode *bnode = node->bnode();
+  for (const bNodeTree *btree : tree.used_btrees()) {
+    for (const bNode *bnode : btree->all_nodes()) {
       if (bnode->typeinfo->build_multi_function == nullptr) {
         continue;
       }
diff --git a/source/blender/nodes/intern/node_tree_ref.cc b/source/blender/nodes/intern/node_tree_ref.cc
deleted file mode 100644
index 05e7fe33776..00000000000
--- a/source/blender/nodes/intern/node_tree_ref.cc
+++ /dev/null
@@ -1,679 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-
-#include <mutex>
-
-#include "NOD_node_tree_ref.hh"
-
-#include "BLI_dot_export.hh"
-#include "BLI_stack.hh"
-
-#include "RNA_prototypes.h"
-
-namespace blender::nodes {
-
-NodeTreeRef::NodeTreeRef(bNodeTree *btree) : btree_(btree)
-{
-  Map<bNode *, NodeRef *> node_mapping;
-
-  LISTBASE_FOREACH (bNode *, bnode, &btree->nodes) {
-    NodeRef &node = *allocator_.construct<NodeRef>().release();
-
-    node.tree_ = this;
-    node.bnode_ = bnode;
-    node.id_ = nodes_by_id_.append_and_get_index(&node);
-
-    LISTBASE_FOREACH (bNodeSocket *, bsocket, &bnode->inputs) {
-      InputSocketRef &socket = *allocator_.construct<InputSocketRef>().release();
-      socket.node_ = &node;
-      socket.index_ = node.inputs_.append_and_get_index(&socket);
-      socket.is_input_ = true;
-      socket.bsocket_ = bsocket;
-      socket.id_ = sockets_by_id_.append_and_get_index(&socket);
-    }
-
-    LISTBASE_FOREACH (bNodeSocket *, bsocket, &bnode->outputs) {
-      OutputSocketRef &socket = *allocator_.construct<OutputSocketRef>().release();
-      socket.node_ = &node;
-      socket.index_ = node.outputs_.append_and_get_index(&socket);
-      socket.is_input_ = false;
-      socket.bsocket_ = bsocket;
-      socket.id_ = sockets_by_id_.append_and_get_index(&socket);
-    }
-
-    LISTBASE_FOREACH (bNodeLink *, blink, &bnode->internal_links) {
-      InternalLinkRef &internal_link = *allocator_.construct<InternalLinkRef>().release();
-      internal_link.blink_ = blink;
-      for (InputSocketRef *socket_ref : node.inputs_) {
-        if (socket_ref->bsocket_ == blink->fromsock) {
-          internal_link.from_ = socket_ref;
-          break;
-        }
-      }
-      for (OutputSocketRef *socket_ref : node.outputs_) {
-        if (socket_ref->bsocket_ == blink->tosock) {
-          internal_link.to_ = socket_ref;
-          break;
-        }
-      }
-      BLI_assert(internal_link.from_ != nullptr);
-      BLI_assert(internal_link.to_ != nullptr);
-      node.internal_links_.append(&internal_link);
-    }
-
-    input_sockets_.extend(node.inputs_.as_span());
-    output_sockets_.extend(node.outputs_.as_span());
-
-    node_mapping.add_new(bnode, &node);
-  }
-
-  LISTBASE_FOREACH (bNodeLink *, blink, &btree->links) {
-    OutputSocketRef &from_socket = this->find_output_socket(
-        node_mapping, blink->fromnode, blink->fromsock);
-    InputSocketRef &to_socket = this->find_input_socket(
-        node_mapping, blink->tonode, blink->tosock);
-
-    LinkRef &link = *allocator_.construct<LinkRef>().release();
-    link.from_ = &from_socket;
-    link.to_ = &to_socket;
-    link.blink_ = blink;
-
-    links_.append(&link);
-
-    from_socket.directly_linked_links_.append(&link);
-    to_socket.directly_linked_links_.append(&link);
-  }
-
-  for (InputSocketRef *input_socket : input_sockets_) {
-    if (input_socket->is_multi_input_socket()) {
-      std::sort(input_socket->directly_linked_links_.begin(),
-                input_socket->directly_linked_links_.end(),
-                [&](const LinkRef *a, const LinkRef *b) -> bool {
-                  int index_a = a->blink()->multi_input_socket_index;
-                  int index_b = b->blink()->multi_input_socket_index;
-                  return index_a > index_b;
-                });
-    }
-  }
-
-  this->create_socket_identifier_maps();
-  this->create_linked_socket_caches();
-
-  for (NodeRef *node : nodes_by_id_) {
-    const bNodeType *nodetype = node->bnode_->typeinfo;
-    nodes_by_type_.add(nodetype, node);
-  }
-
-  const Span<const NodeRef *> group_output_nodes = this->nodes_by_type("NodeGroupOutput");
-  if (group_output_nodes.is_empty()) {
-    group_output_node_ = nullptr;
-  }
-  else if (group_output_nodes.size() == 1) {
-    group_output_node_ = group_output_nodes.first();
-  }
-  else {
-    for (const NodeRef *group_output : group_output_nodes) {
-      if (group_output->bnode_->flag & NODE_DO_OUTPUT) {
-        group_output_node_ = group_output;
-        break;
-      }
-    }
-  }
-}
-
-NodeTreeRef::~NodeTreeRef()
-{
-  /* The destructor has to be called manually, because these types are allocated in a linear
-   * allocator. */
-  for (NodeRef *node : nodes_by_id_) {
-    node->~NodeRef();
-  }
-  for (InputSocketRef *socket : input_sockets_) {
-    socket->~InputSocketRef();
-  }
-  for (OutputSocketRef *socket : output_sockets_) {
-    socket->~OutputSocketRef();
-  }
-  for (LinkRef *link : links_) {
-    link->~LinkRef();
-  }
-}
-
-InputSocketRef &NodeTreeRef::find_input_socket(Map<bNode *, NodeRef *> &node_mapping,
-                                               bNode *bnode,
-                                               bNodeSocket *bsocket)
-{
-  NodeRef *node = node_mapping.lookup(bnode);
-  for (InputSocketRef *socket : node->inputs_) {
-    if (socket->bsocket_ == bsocket) {
-      return *socket;
-    }
-  }
-  BLI_assert_unreachable();
-  return *node->inputs_[0];
-}
-
-OutputSocketRef &NodeTreeRef::find_output_socket(Map<bNode *, NodeRef *> &node_mapping,
-                                                 bNode *bnode,
-                                                 bNodeSocket *bsocket)
-{
-  NodeRef *node = node_mapping.lookup(bnode);
-  for (OutputSocketRef *socket : node->outputs_) {
-    if (socket->bsocket_ == bsocket) {
-      return *socket;
-    }
-  }
-  BLI_assert_unreachable();
-  return *node->outputs_[0];
-}
-
-void NodeTreeRef::create_linked_socket_caches()
-{
-  for (InputSocketRef *socket : input_sockets_) {
-    /* Find directly linked socket based on incident links. */
-    Vector<const SocketRef *> directly_linked_sockets;
-    for (LinkRef *link : socket->directly_linked_links_) {
-      directly_linked_sockets.append(link->from_);
-    }
-    socket->directly_linked_sockets_ = allocator_.construct_array_copy(
-        directly_linked_sockets.as_span());
-
-    /* Find logically linked sockets. */
-    Vector<const SocketRef *> logically_linked_sockets;
-    Vector<const SocketRef *> logically_linked_skipped_sockets;
-    Vector<const InputSocketRef *> seen_sockets_stack;
-    socket->foreach_logical_origin(
-        [&](const OutputSocketRef &origin) { logically_linked_sockets.append(&origin); },
-        [&](const SocketRef &socket) { logically_linked_skipped_sockets.append(&socket); },
-        false,
-        seen_sockets_stack);
-    if (logically_linked_sockets == directly_linked_sockets) {
-      socket->logically_linked_sockets_ = socket->directly_linked_sockets_;
-    }
-    else {
-      socket->logically_linked_sockets_ = allocator_.construct_array_copy(
-          logically_linked_sockets.as_span());
-    }
-    socket->logically_linked_skipped_sockets_ = allocator_.construct_array_copy(
-        logically_linked_skipped_sockets.as_span());
-  }
-
-  for (OutputSocketRef *socket : output_sockets_) {
-    /* Find directly linked socket based on incident links. */
-    Vector<const SocketRef *> directly_linked_sockets;
-    for (LinkRef *link : socket->directly_linked_links_) {
-      directly_linked_sockets.append(link->to_);
-    }
-    socket->directly_linked_sockets_ = allocator_.construct_array_copy(
-        directly_linked_sockets.as_span());
-
-    /* Find logically linked sockets. */
-    Vector<const SocketRef *> logically_linked_sockets;
-    Vector<const SocketRef *> logically_linked_skipped_sockets;
-    Vector<const OutputSocketRef *> handled_sockets;
-    socket->foreach_logical_target(
-        [&](const InputSocketRef &target) { logically_linked_sockets.append(&target); },
-        [&](const SocketRef &socket) { logically_linked_skipped_sockets.append(&socket); },
-        handled_sockets);
-    if (logically_linked_sockets == directly_linked_sockets) {
-      socket->logically_linked_sockets_ = socket->directly_linked_sockets_;
-    }
-    else {
-      socket->logically_linked_sockets_ = allocator_.construct_array_copy(
-          logically_linked_sockets.as_span());
-    }
-    socket->logically_linked_skipped_sockets_ = allocator_.construct_array_copy(
-        logically_linked_skipped_sockets.as_span());
-  }
-}
-
-void InputSocketRef::foreach_logical_origin(
-    FunctionRef<void(const OutputSocketRef &)> origin_fn,
-    FunctionRef<void(const SocketRef &)> skipped_fn,
-    bool only_follow_first_input_link,
-    Vector<const InputSocketRef *> &seen_sockets_stack) const
-{
-  /* Protect against loops. */
-  if (seen_sockets_stack.contains(this)) {
-    return;
-  }
-  seen_sockets_stack.append(this);
-
-  Span<const LinkRef *> links_to_check = this->directly_linked_links();
-  if (only_follow_first_input_link) {
-    links_to_check = links_to_check.take_front(1);
-  }
-  for (const LinkRef *link : links_to_check) {
-    if (link->is_muted()) {
-      continue;
-    }
-    const OutputSocketRef &origin = link->from();
-    const NodeRef &origin_node = origin.node();
-    if (!origin.is_available()) {
-      /* Non available sockets are ignored. */
-    }
-    else if (origin_node.is_reroute_node()) {
-      const InputSocketRef &reroute_input = origin_node.input(0);
-      const OutputSocketRef &reroute_output = origin_node.output(0);
-      skipped_fn.call_safe(reroute_input);
-      skipped_fn.call_safe(reroute_output);
-      reroute_input.foreach_logical_origin(origin_fn, skipped_fn, false, seen_sockets_stack);
-    }
-    else if (origin_node.is_muted()) {
-      for (const InternalLinkRef *internal_link : origin_node.internal_links()) {
-        if (&internal_link->to() == &origin) {
-          const InputSocketRef &mute_input = internal_link->from();
-          skipped_fn.call_safe(origin);
-          skipped_fn.call_safe(mute_input);
-          mute_input.foreach_logical_origin(origin_fn, skipped_fn, true, seen_sockets_stack);
-        }
-      }
-    }
-    else {
-      origin_fn(origin);
-    }
-  }
-
-  seen_sockets_stack.pop_last();
-}
-
-void OutputSocketRef::foreach_logical_target(
-    FunctionRef<void(const InputSocketRef &)> target_fn,
-    FunctionRef<void(const SocketRef &)> skipped_fn,
-    Vector<const OutputSocketRef *> &seen_sockets_stack) const
-{
-  /* Protect against loops. */
-  if (seen_sockets_stack.contains(this)) {
-    return;
-  }
-  seen_sockets_stack.append(this);
-
-  for (const LinkRef *link : this->directly_linked_links()) {
-    if (link->is_muted()) {
-      continue;
-    }
-    const InputSocketRef &target = link->to();
-    const NodeRef &target_node = target.node();
-    if (!target.is_available()) {
-      /* Non available sockets are ignored. */
-    }
-    else if (target_node.is_reroute_node()) {
-      const OutputSocketRef &reroute_output = target_node.output(0);
-      skipped_fn.call_safe(target);
-      skipped_fn.call_safe(reroute_output);
-      reroute_output.foreach_logical_target(target_fn, skipped_fn, seen_sockets_stack);
-    }
-    else if (target_node.is_muted()) {
-      skipped_fn.call_safe(target);
-      for (const InternalLinkRef *internal_link : target_node.internal_links()) {
-        if (&internal_link->from() == &target) {
-          /* The internal link only forwards the first incoming link. */
-          if (target.is_multi_input_socket()) {
-            if (target.directly_linked_links()[0] != link) {
-              continue;
-            }
-          }
-          const OutputSocketRef &mute_output = internal_link->to();
-          skipped_fn.call_safe(target);
-          skipped_fn.call_safe(mute_output);
-          mute_output.foreach_logical_target(target_fn, skipped_fn, seen_sockets_stack);
-        }
-      }
-    }
-    else {
-      target_fn(target);
-    }
-  }
-
-  seen_sockets_stack.pop_last();
-}
-
-namespace {
-struct SocketByIdentifierMap {
-  SocketIndexByIdentifierMap *map = nullptr;
-  std::unique_ptr<SocketIndexByIdentifierMap> owned_map;
-};
-}  // namespace
-
-static std::unique_ptr<SocketIndexByIdentifierMap> create_identifier_map(const ListBase &sockets)
-{
-  std::unique_ptr<SocketIndexByIdentifierMap> map = std::make_unique<SocketIndexByIdentifierMap>();
-  int index;
-  LISTBASE_FOREACH_INDEX (bNodeSocket *, socket, &sockets, index) {
-    map->add_new(socket->identifier, index);
-  }
-  return map;
-}
-
-/* This function is not threadsafe. */
-static SocketByIdentifierMap get_or_create_identifier_map(
-    const bNode &node, const ListBase &sockets, const bNodeSocketTemplate *sockets_template)
-{
-  SocketByIdentifierMap map;
-  if (sockets_template == nullptr) {
-    if (BLI_listbase_is_empty(&sockets)) {
-      static SocketIndexByIdentifierMap empty_map;
-      map.map = &empty_map;
-    }
-    else if (node.type == NODE_REROUTE) {
-      if (&node.inputs == &sockets) {
-        static SocketIndexByIdentifierMap reroute_input_map = [] {
-          SocketIndexByIdentifierMap map;
-          map.add_new("Input", 0);
-          return map;
-        }();
-        map.map = &reroute_input_map;
-      }
-      else {
-        static SocketIndexByIdentifierMap reroute_output_map = [] {
-          SocketIndexByIdentifierMap map;
-          map.add_new("Output", 0);
-          return map;
-        }();
-        map.map = &reroute_output_map;
-      }
-    }
-    else {
-      /* The node has a dynamic amount of sockets. Therefore we need to create a new map. */
-      map.owned_map = create_identifier_map(sockets);
-      map.map = &*map.owned_map;
-    }
-  }
-  else {
-    /* Cache only one map for nodes that have the same sockets. */
-    static Map<const bNodeSocketTemplate *, std::unique_ptr<SocketIndexByIdentifierMap>> maps;
-    map.map = &*maps.lookup_or_add_cb(sockets_template,
-                                      [&]() { return create_identifier_map(sockets); });
-  }
-  return map;
-}
-
-void NodeTreeRef::create_socket_identifier_maps()
-{
-  /* `get_or_create_identifier_map` is not threadsafe, therefore we have to hold a lock here. */
-  static std::mutex mutex;
-  std::lock_guard lock{mutex};
-
-  for (NodeRef *node : nodes_by_id_) {
-    bNode &bnode = *node->bnode_;
-    SocketByIdentifierMap inputs_map = get_or_create_identifier_map(
-        bnode, bnode.inputs, bnode.typeinfo->inputs);
-    SocketByIdentifierMap outputs_map = get_or_create_identifier_map(
-        bnode, bnode.outputs, bnode.typeinfo->outputs);
-    node->input_index_by_identifier_ = inputs_map.map;
-    node->output_index_by_identifier_ = outputs_map.map;
-    if (inputs_map.owned_map) {
-      owned_identifier_maps_.append(std::move(inputs_map.owned_map));
-    }
-    if (outputs_map.owned_map) {
-      owned_identifier_maps_.append(std::move(outputs_map.owned_map));
-    }
-  }
-}
-
-static bool has_link_cycles_recursive(const NodeRef &node,
-                                      MutableSpan<bool> visited,
-                                      MutableSpan<bool> is_in_stack)
-{
-  const int node_id = node.id();
-  if (is_in_stack[node_id]) {
-    return true;
-  }
-  if (visited[node_id]) {
-    return false;
-  }
-
-  visited[node_id] = true;
-  is_in_stack[node_id] = true;
-
-  for (const OutputSocketRef *from_socket : node.outputs()) {
-    if (!from_socket->is_available()) {
-      continue;
-    }
-    for (const InputSocketRef *to_socket : from_socket->directly_linked_sockets()) {
-      if (!to_socket->is_available()) {
-        continue;
-      }
-      const NodeRef &to_node = to_socket->node();
-      if (has_link_cycles_recursive(to_node, visited, is_in_stack)) {
-        return true;
-      }
-    }
-  }
-
-  is_in_stack[node_id] = false;
-  return false;
-}
-
-bool NodeTreeRef::has_link_cycles() const
-{
-  const int node_amount = nodes_by_id_.size();
-  Array<bool> visited(node_amount, false);
-  Array<bool> is_in_stack(node_amount, false);
-
-  for (const NodeRef *node : nodes_by_id_) {
-    if (has_link_cycles_recursive(*node, visited, is_in_stack)) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool NodeTreeRef::has_undefined_nodes_or_sockets() const
-{
-  for (const NodeRef *node : nodes_by_id_) {
-    if (node->is_undefined()) {
-      return true;
-    }
-  }
-  for (const SocketRef *socket : sockets_by_id_) {
-    if (socket->is_undefined()) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool NodeRef::any_input_is_directly_linked() const
-{
-  for (const SocketRef *socket : inputs_) {
-    if (!socket->directly_linked_sockets().is_empty()) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool NodeRef::any_output_is_directly_linked() const
-{
-  for (const SocketRef *socket : outputs_) {
-    if (!socket->directly_linked_sockets().is_empty()) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool NodeRef::any_socket_is_directly_linked(eNodeSocketInOut in_out) const
-{
-  if (in_out == SOCK_IN) {
-    return this->any_input_is_directly_linked();
-  }
-  return this->any_output_is_directly_linked();
-}
-
-struct ToposortNodeState {
-  bool is_done = false;
-  bool is_in_stack = false;
-};
-
-static void toposort_from_start_node(const NodeTreeRef::ToposortDirection direction,
-                                     const NodeRef &start_node,
-                                     MutableSpan<ToposortNodeState> node_states,
-                                     NodeTreeRef::ToposortResult &result)
-{
-  struct Item {
-    const NodeRef *node;
-    /* Index of the next socket that is checked in the depth-first search. */
-    int socket_index = 0;
-    /* Link index in the next socket that is checked in the depth-first search. */
-    int link_index = 0;
-  };
-
-  /* Do a depth-first search to sort nodes topologically. */
-  Stack<Item, 64> nodes_to_check;
-  nodes_to_check.push({&start_node});
-  node_states[start_node.id()].is_in_stack = true;
-  while (!nodes_to_check.is_empty()) {
-    Item &item = nodes_to_check.peek();
-    const NodeRef &node = *item.node;
-    const Span<const SocketRef *> sockets = node.sockets(
-        direction == NodeTreeRef::ToposortDirection::LeftToRight ? SOCK_IN : SOCK_OUT);
-
-    while (true) {
-      if (item.socket_index == sockets.size()) {
-        /* All sockets have already been visited. */
-        break;
-      }
-      const SocketRef &socket = *sockets[item.socket_index];
-      const Span<const SocketRef *> linked_sockets = socket.directly_linked_sockets();
-      if (item.link_index == linked_sockets.size()) {
-        /* All links connected to this socket have already been visited. */
-        item.socket_index++;
-        item.link_index = 0;
-        continue;
-      }
-      const SocketRef &linked_socket = *linked_sockets[item.link_index];
-      const NodeRef &linked_node = linked_socket.node();
-      ToposortNodeState &linked_node_state = node_states[linked_node.id()];
-      if (linked_node_state.is_done) {
-        /* The linked node has already been visited. */
-        item.link_index++;
-        continue;
-      }
-      if (linked_node_state.is_in_stack) {
-        result.has_cycle = true;
-      }
-      else {
-        nodes_to_check.push({&linked_node});
-        linked_node_state.is_in_stack = true;
-      }
-      break;
-    }
-
-    /* If no other element has been pushed, the current node can be pushed to the sorted list. */
-    if (&item == &nodes_to_check.peek()) {
-      ToposortNodeState &node_state = node_states[node.id()];
-      node_state.is_done = true;
-      node_state.is_in_stack = false;
-      result.sorted_nodes.append(&node);
-      nodes_to_check.pop();
-    }
-  }
-}
-
-NodeTreeRef::ToposortResult NodeTreeRef::toposort(const ToposortDirection direction) const
-{
-  ToposortResult result;
-  result.sorted_nodes.reserve(nodes_by_id_.size());
-
-  Array<ToposortNodeState> node_states(nodes_by_id_.size());
-
-  for (const NodeRef *node : nodes_by_id_) {
-    if (node_states[node->id()].is_done) {
-      /* Ignore nodes that are done already. */
-      continue;
-    }
-    if (node->any_socket_is_directly_linked(
-            direction == ToposortDirection::LeftToRight ? SOCK_OUT : SOCK_IN)) {
-      /* Ignore non-start nodes. */
-      continue;
-    }
-
-    toposort_from_start_node(direction, *node, node_states, result);
-  }
-
-  /* Check if the loop above forgot some nodes because there is a cycle. */
-  if (result.sorted_nodes.size() < nodes_by_id_.size()) {
-    result.has_cycle = true;
-    for (const NodeRef *node : nodes_by_id_) {
-      if (node_states[node->id()].is_done) {
-        /* Ignore nodes that are done already. */
-        continue;
-      }
-      /* Start toposort at this node which is somewhere in the middle of a loop. */
-      toposort_from_start_node(direction, *node, node_states, result);
-    }
-  }
-
-  BLI_assert(result.sorted_nodes.size() == nodes_by_id_.size());
-  return result;
-}
-
-const NodeRef *NodeTreeRef::find_node(const bNode &bnode) const
-{
-  for (const NodeRef *node : this->nodes_by_type(bnode.typeinfo)) {
-    if (node->bnode_ == &bnode) {
-      return node;
-    }
-  }
-  return nullptr;
-}
-
-std::string NodeTreeRef::to_dot() const
-{
-  dot::DirectedGraph digraph;
-  digraph.set_rankdir(dot::Attr_rankdir::LeftToRight);
-
-  Map<const NodeRef *, dot::NodeWithSocketsRef> dot_nodes;
-
-  for (const NodeRef *node : nodes_by_id_) {
-    dot::Node &dot_node = digraph.new_node("");
-    dot_node.set_background_color("white");
-
-    Vector<std::string> input_names;
-    Vector<std::string> output_names;
-    for (const InputSocketRef *socket : node->inputs()) {
-      input_names.append(socket->name());
-    }
-    for (const OutputSocketRef *socket : node->outputs()) {
-      output_names.append(socket->name());
-    }
-
-    dot_nodes.add_new(node,
-                      dot::NodeWithSocketsRef(dot_node, node->name(), input_names, output_names));
-  }
-
-  for (const OutputSocketRef *from_socket : output_sockets_) {
-    for (const InputSocketRef *to_socket : from_socket->directly_linked_sockets()) {
-      dot::NodeWithSocketsRef &from_dot_node = dot_nodes.lookup(&from_socket->node());
-      dot::NodeWithSocketsRef &to_dot_node = dot_nodes.lookup(&to_socket->node());
-
-      digraph.new_edge(from_dot_node.output(from_socket->index()),
-                       to_dot_node.input(to_socket->index()));
-    }
-  }
-
-  return digraph.to_dot_string();
-}
-
-const NodeTreeRef &get_tree_ref_from_map(NodeTreeRefMap &node_tree_refs, bNodeTree &btree)
-{
-  return *node_tree_refs.lookup_or_add_cb(&btree,
-                                          [&]() { return std::make_unique<NodeTreeRef>(&btree); });
-}
-
-PointerRNA NodeRef::rna() const
-{
-  PointerRNA rna;
-  RNA_pointer_create(&tree_->btree()->id, &RNA_Node, bnode_, &rna);
-  return rna;
-}
-
-PointerRNA SocketRef::rna() const
-{
-  PointerRNA rna;
-  RNA_pointer_create(&this->tree().btree()->id, &RNA_NodeSocket, bsocket_, &rna);
-  return rna;
-}
-
-}  // namespace blender::nodes
diff --git a/source/blender/nodes/shader/CMakeLists.txt b/source/blender/nodes/shader/CMakeLists.txt
index 3e90f185168..d135f9a12a4 100644
--- a/source/blender/nodes/shader/CMakeLists.txt
+++ b/source/blender/nodes/shader/CMakeLists.txt
@@ -68,6 +68,7 @@ set(SRC
   nodes/node_shader_mapping.cc
   nodes/node_shader_math.cc
   nodes/node_shader_mix_rgb.cc
+  nodes/node_shader_mix.cc
   nodes/node_shader_mix_shader.cc
   nodes/node_shader_normal.cc
   nodes/node_shader_normal_map.cc
diff --git a/source/blender/nodes/shader/node_shader_util.hh b/source/blender/nodes/shader/node_shader_util.hh
index d5f54d9cac9..38220634695 100644
--- a/source/blender/nodes/shader/node_shader_util.hh
+++ b/source/blender/nodes/shader/node_shader_util.hh
@@ -59,6 +59,8 @@
 #include "RE_pipeline.h"
 #include "RE_texture.h"
 
+#include "RNA_access.h"
+
 bool sh_node_poll_default(struct bNodeType *ntype,
                           struct bNodeTree *ntree,
                           const char **r_disabled_hint);
diff --git a/source/blender/nodes/shader/nodes/node_shader_color_ramp.cc b/source/blender/nodes/shader/nodes/node_shader_color_ramp.cc
index 3723480ffa3..d73ffd89288 100644
--- a/source/blender/nodes/shader/nodes/node_shader_color_ramp.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_color_ramp.cc
@@ -125,7 +125,7 @@ class ColorBandFunction : public fn::MultiFunction {
 
 static void sh_node_valtorgb_build_multi_function(nodes::NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   const ColorBand *color_band = (const ColorBand *)bnode.storage;
   builder.construct_and_set_matching_fn<ColorBandFunction>(*color_band);
 }
diff --git a/source/blender/nodes/shader/nodes/node_shader_curves.cc b/source/blender/nodes/shader/nodes/node_shader_curves.cc
index eb47059063d..4725aef5991 100644
--- a/source/blender/nodes/shader/nodes/node_shader_curves.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_curves.cc
@@ -95,7 +95,7 @@ class CurveVecFunction : public fn::MultiFunction {
 
 static void sh_node_curve_vec_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   CurveMapping *cumap = (CurveMapping *)bnode.storage;
   BKE_curvemapping_init(cumap);
   builder.construct_and_set_matching_fn<CurveVecFunction>(*cumap);
@@ -237,7 +237,7 @@ class CurveRGBFunction : public fn::MultiFunction {
 
 static void sh_node_curve_rgb_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   CurveMapping *cumap = (CurveMapping *)bnode.storage;
   BKE_curvemapping_init(cumap);
   builder.construct_and_set_matching_fn<CurveRGBFunction>(*cumap);
@@ -356,7 +356,7 @@ class CurveFloatFunction : public fn::MultiFunction {
 
 static void sh_node_curve_float_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &bnode = builder.node();
+  const bNode &bnode = builder.node();
   CurveMapping *cumap = (CurveMapping *)bnode.storage;
   BKE_curvemapping_init(cumap);
   builder.construct_and_set_matching_fn<CurveFloatFunction>(*cumap);
diff --git a/source/blender/nodes/shader/nodes/node_shader_math.cc b/source/blender/nodes/shader/nodes/node_shader_math.cc
index 73ee6fb3f85..bd83f8dac37 100644
--- a/source/blender/nodes/shader/nodes/node_shader_math.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_math.cc
@@ -102,7 +102,7 @@ static int gpu_shader_math(GPUMaterial *mat,
   return 0;
 }
 
-static const fn::MultiFunction *get_base_multi_function(bNode &node)
+static const fn::MultiFunction *get_base_multi_function(const bNode &node)
 {
   const int mode = node.custom1;
   const fn::MultiFunction *base_fn = nullptr;
diff --git a/source/blender/nodes/shader/nodes/node_shader_mix.cc b/source/blender/nodes/shader/nodes/node_shader_mix.cc
new file mode 100644
index 00000000000..918d9b747d5
--- /dev/null
+++ b/source/blender/nodes/shader/nodes/node_shader_mix.cc
@@ -0,0 +1,443 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2005 Blender Foundation. All rights reserved. */
+
+/** \file
+ * \ingroup shdnodes
+ */
+
+#include <algorithm>
+
+#include "UI_interface.h"
+#include "UI_resources.h"
+
+#include "node_shader_util.hh"
+
+#include "NOD_socket_search_link.hh"
+#include "RNA_enum_types.h"
+
+namespace blender::nodes::node_sh_mix_cc {
+
+NODE_STORAGE_FUNCS(NodeShaderMix)
+
+static void sh_node_mix_declare(NodeDeclarationBuilder &b)
+{
+  b.is_function_node();
+  b.add_input<decl::Float>(N_("Factor"), "Factor_Float")
+      .default_value(0.5f)
+      .min(0.0f)
+      .max(1.0f)
+      .subtype(PROP_FACTOR);
+  b.add_input<decl::Vector>(N_("Factor"), "Factor_Vector")
+      .default_value(float3(0.5f))
+      .subtype(PROP_FACTOR);
+
+  b.add_input<decl::Float>(N_("A"), "A_Float")
+      .min(-10000.0f)
+      .max(10000.0f)
+      .is_default_link_socket();
+  b.add_input<decl::Float>(N_("B"), "B_Float").min(-10000.0f).max(10000.0f);
+
+  b.add_input<decl::Vector>(N_("A"), "A_Vector").is_default_link_socket();
+  b.add_input<decl::Vector>(N_("B"), "B_Vector");
+
+  b.add_input<decl::Color>(N_("A"), "A_Color")
+      .default_value({0.5f, 0.5f, 0.5f, 1.0f})
+      .is_default_link_socket();
+  b.add_input<decl::Color>(N_("B"), "B_Color").default_value({0.5f, 0.5f, 0.5f, 1.0f});
+
+  b.add_output<decl::Float>(N_("Result"), "Result_Float");
+  b.add_output<decl::Vector>(N_("Result"), "Result_Vector");
+  b.add_output<decl::Color>(N_("Result"), "Result_Color");
+};
+
+static void sh_node_mix_layout(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
+{
+  const NodeShaderMix &data = node_storage(*static_cast<const bNode *>(ptr->data));
+  uiItemR(layout, ptr, "data_type", 0, "", ICON_NONE);
+  if (data.data_type == SOCK_VECTOR) {
+    uiItemR(layout, ptr, "factor_mode", 0, "", ICON_NONE);
+  }
+  if (data.data_type == SOCK_RGBA) {
+    uiItemR(layout, ptr, "blend_type", 0, "", ICON_NONE);
+    uiItemR(layout, ptr, "clamp_result", 0, nullptr, ICON_NONE);
+    uiItemR(layout, ptr, "clamp_factor", 0, nullptr, ICON_NONE);
+  }
+  else {
+    uiItemR(layout, ptr, "clamp_factor", 0, nullptr, ICON_NONE);
+  }
+}
+
+static void sh_node_mix_label(const bNodeTree *UNUSED(ntree),
+                              const bNode *node,
+                              char *label,
+                              int maxlen)
+{
+  const NodeShaderMix &storage = node_storage(*node);
+  if (storage.data_type == SOCK_RGBA) {
+    const char *name;
+    bool enum_label = RNA_enum_name(rna_enum_ramp_blend_items, storage.blend_type, &name);
+    if (!enum_label) {
+      name = "Unknown";
+    }
+    BLI_strncpy(label, IFACE_(name), maxlen);
+  }
+}
+
+static int sh_node_mix_ui_class(const bNode *node)
+{
+  const NodeShaderMix &storage = node_storage(*node);
+  const eNodeSocketDatatype data_type = static_cast<eNodeSocketDatatype>(storage.data_type);
+
+  switch (data_type) {
+    case SOCK_VECTOR:
+      return NODE_CLASS_OP_VECTOR;
+    case SOCK_RGBA:
+      return NODE_CLASS_OP_COLOR;
+    default:
+      return NODE_CLASS_CONVERTER;
+  }
+}
+
+static void sh_node_mix_update(bNodeTree *ntree, bNode *node)
+{
+  const NodeShaderMix &storage = node_storage(*node);
+  const eNodeSocketDatatype data_type = static_cast<eNodeSocketDatatype>(storage.data_type);
+
+  LISTBASE_FOREACH (bNodeSocket *, socket, &node->inputs) {
+    nodeSetSocketAvailability(ntree, socket, socket->type == data_type);
+  }
+
+  LISTBASE_FOREACH (bNodeSocket *, socket, &node->outputs) {
+    nodeSetSocketAvailability(ntree, socket, socket->type == data_type);
+  }
+
+  bool use_vector_factor = data_type == SOCK_VECTOR &&
+                           storage.factor_mode != NODE_MIX_MODE_UNIFORM;
+
+  bNodeSocket *sock_factor = (bNodeSocket *)BLI_findlink(&node->inputs, 0);
+  nodeSetSocketAvailability(ntree, sock_factor, !use_vector_factor);
+
+  bNodeSocket *sock_factor_vec = (bNodeSocket *)BLI_findlink(&node->inputs, 1);
+  nodeSetSocketAvailability(ntree, sock_factor_vec, use_vector_factor);
+}
+
+static void node_mix_gather_link_searches(GatherLinkSearchOpParams &params)
+{
+  const eNodeSocketDatatype sock_type = static_cast<eNodeSocketDatatype>(
+      params.other_socket().type);
+
+  if (ELEM(sock_type, SOCK_BOOLEAN, SOCK_FLOAT, SOCK_RGBA, SOCK_VECTOR, SOCK_INT)) {
+    const eNodeSocketDatatype type = ELEM(sock_type, SOCK_BOOLEAN, SOCK_INT) ? SOCK_FLOAT :
+                                                                               sock_type;
+
+    if (params.in_out() == SOCK_OUT) {
+      params.add_item(IFACE_("Result"), [type](LinkSearchOpParams &params) {
+        bNode &node = params.add_node("ShaderNodeMix");
+        node_storage(node).data_type = type;
+        params.update_and_connect_available_socket(node, "Result");
+      });
+    }
+    else {
+      if (ELEM(sock_type, SOCK_VECTOR, SOCK_RGBA)) {
+        params.add_item(IFACE_("Factor (Non-Uniform)"), [type](LinkSearchOpParams &params) {
+          bNode &node = params.add_node("ShaderNodeMix");
+          node_storage(node).data_type = SOCK_VECTOR;
+          node_storage(node).factor_mode = NODE_MIX_MODE_NON_UNIFORM;
+          params.update_and_connect_available_socket(node, "Factor");
+        });
+      }
+      params.add_item(IFACE_("Factor"), [type](LinkSearchOpParams &params) {
+        bNode &node = params.add_node("ShaderNodeMix");
+        node_storage(node).data_type = type;
+        params.update_and_connect_available_socket(node, "Factor");
+      });
+      params.add_item(IFACE_("A"), [type](LinkSearchOpParams &params) {
+        bNode &node = params.add_node("ShaderNodeMix");
+        node_storage(node).data_type = type;
+        params.update_and_connect_available_socket(node, "A");
+      });
+      params.add_item(IFACE_("B"), [type](LinkSearchOpParams &params) {
+        bNode &node = params.add_node("ShaderNodeMix");
+        node_storage(node).data_type = type;
+        params.update_and_connect_available_socket(node, "B");
+      });
+    }
+  }
+}
+
+static void node_mix_init(bNodeTree *UNUSED(tree), bNode *node)
+{
+  NodeShaderMix *data = MEM_cnew<NodeShaderMix>(__func__);
+  data->data_type = SOCK_FLOAT;
+  data->factor_mode = NODE_MIX_MODE_UNIFORM;
+  data->clamp_factor = 1;
+  data->clamp_result = 0;
+  data->blend_type = MA_RAMP_BLEND;
+  node->storage = data;
+}
+
+static const char *gpu_shader_get_name(eNodeSocketDatatype data_type,
+                                       const bool non_uniform,
+                                       const int blend_type)
+{
+  switch (data_type) {
+    case SOCK_FLOAT:
+      return "node_mix_float";
+    case SOCK_VECTOR:
+      return (non_uniform) ? "node_mix_vector_non_uniform" : "node_mix_vector";
+    case SOCK_RGBA:
+      switch (blend_type) {
+        case MA_RAMP_BLEND:
+          return "node_mix_blend";
+        case MA_RAMP_ADD:
+          return "node_mix_add";
+        case MA_RAMP_MULT:
+          return "node_mix_mult";
+        case MA_RAMP_SUB:
+          return "node_mix_sub";
+        case MA_RAMP_SCREEN:
+          return "node_mix_screen";
+        case MA_RAMP_DIV:
+          return "node_mix_div_fallback";
+        case MA_RAMP_DIFF:
+          return "node_mix_diff";
+        case MA_RAMP_DARK:
+          return "node_mix_dark";
+        case MA_RAMP_LIGHT:
+          return "node_mix_light";
+        case MA_RAMP_OVERLAY:
+          return "node_mix_overlay";
+        case MA_RAMP_DODGE:
+          return "node_mix_dodge";
+        case MA_RAMP_BURN:
+          return "node_mix_burn";
+        case MA_RAMP_HUE:
+          return "node_mix_hue";
+        case MA_RAMP_SAT:
+          return "node_mix_sat";
+        case MA_RAMP_VAL:
+          return "node_mix_val";
+        case MA_RAMP_COLOR:
+          return "node_mix_color";
+        case MA_RAMP_SOFT:
+          return "node_mix_soft";
+        case MA_RAMP_LINEAR:
+          return "node_mix_linear";
+        default:
+          BLI_assert_unreachable();
+          return nullptr;
+      }
+    default:
+      BLI_assert_unreachable();
+      return nullptr;
+  }
+}
+
+static int gpu_shader_mix(GPUMaterial *mat,
+                          bNode *node,
+                          bNodeExecData *UNUSED(execdata),
+                          GPUNodeStack *in,
+                          GPUNodeStack *out)
+{
+  const NodeShaderMix &storage = node_storage(*node);
+  const bool is_non_uniform = storage.factor_mode == NODE_MIX_MODE_NON_UNIFORM;
+  const bool is_color_mode = storage.data_type == SOCK_RGBA;
+  const bool is_vector_mode = storage.data_type == SOCK_VECTOR;
+  const int blend_type = storage.blend_type;
+  const char *name = gpu_shader_get_name(
+      (eNodeSocketDatatype)storage.data_type, is_non_uniform, blend_type);
+
+  if (name == nullptr) {
+    return 0;
+  }
+
+  if (storage.clamp_factor) {
+    if (is_non_uniform && is_vector_mode) {
+      const float min[3] = {0.0f, 0.0f, 0.0f};
+      const float max[3] = {1.0f, 1.0f, 1.0f};
+      const GPUNodeLink *factor_link = in[1].link ? in[1].link : GPU_uniform(in[1].vec);
+      GPU_link(mat,
+               "node_mix_clamp_vector",
+               factor_link,
+               GPU_constant(min),
+               GPU_constant(max),
+               &in[1].link);
+    }
+    else {
+      const float min = 0.0f;
+      const float max = 1.0f;
+      const GPUNodeLink *factor_link = in[0].link ? in[0].link : GPU_uniform(in[0].vec);
+      GPU_link(mat,
+               "node_mix_clamp_value",
+               factor_link,
+               GPU_constant(&min),
+               GPU_constant(&max),
+               &in[0].link);
+    }
+  }
+
+  int ret = GPU_stack_link(mat, node, name, in, out);
+
+  if (ret && is_color_mode && storage.clamp_result) {
+    const float min[3] = {0.0f, 0.0f, 0.0f};
+    const float max[3] = {1.0f, 1.0f, 1.0f};
+    GPU_link(mat,
+             "node_mix_clamp_vector",
+             out[2].link,
+             GPU_constant(min),
+             GPU_constant(max),
+             &out[2].link);
+  }
+  return ret;
+}
+
+class MixColorFunction : public fn::MultiFunction {
+ private:
+  const bool clamp_factor_;
+  const bool clamp_result_;
+  const int blend_type_;
+
+ public:
+  MixColorFunction(const bool clamp_factor, const bool clamp_result, const int blend_type)
+      : clamp_factor_(clamp_factor), clamp_result_(clamp_result), blend_type_(blend_type)
+  {
+    static fn::MFSignature signature = create_signature();
+    this->set_signature(&signature);
+  }
+
+  static fn::MFSignature create_signature()
+  {
+    fn::MFSignatureBuilder signature{"MixColor"};
+    signature.single_input<float>("Factor");
+    signature.single_input<ColorGeometry4f>("A");
+    signature.single_input<ColorGeometry4f>("B");
+    signature.single_output<ColorGeometry4f>("Result");
+    return signature.build();
+  }
+
+  void call(IndexMask mask, fn::MFParams params, fn::MFContext UNUSED(context)) const override
+  {
+    const VArray<float> &fac = params.readonly_single_input<float>(0, "Factor");
+    const VArray<ColorGeometry4f> &col1 = params.readonly_single_input<ColorGeometry4f>(1, "A");
+    const VArray<ColorGeometry4f> &col2 = params.readonly_single_input<ColorGeometry4f>(2, "B");
+    MutableSpan<ColorGeometry4f> results = params.uninitialized_single_output<ColorGeometry4f>(
+        3, "Result");
+
+    if (clamp_factor_) {
+      for (int64_t i : mask) {
+        results[i] = col1[i];
+        ramp_blend(blend_type_, results[i], std::clamp(fac[i], 0.0f, 1.0f), col2[i]);
+      }
+    }
+    else {
+      for (int64_t i : mask) {
+        results[i] = col1[i];
+        ramp_blend(blend_type_, results[i], fac[i], col2[i]);
+      }
+    }
+
+    if (clamp_result_) {
+      for (int64_t i : mask) {
+        clamp_v3(results[i], 0.0f, 1.0f);
+      }
+    }
+  }
+};
+
+static const fn::MultiFunction *get_multi_function(const bNode &node)
+{
+  const NodeShaderMix *data = (NodeShaderMix *)node.storage;
+  bool uniform_factor = data->factor_mode == NODE_MIX_MODE_UNIFORM;
+  const bool clamp_factor = data->clamp_factor;
+  switch (data->data_type) {
+    case SOCK_FLOAT: {
+      if (clamp_factor) {
+        static fn::CustomMF_SI_SI_SI_SO<float, float, float, float> fn{
+            "Clamp Mix Float", [](float t, const float a, const float b) {
+              return math::interpolate(a, b, std::clamp(t, 0.0f, 1.0f));
+            }};
+        return &fn;
+      }
+      else {
+        static fn::CustomMF_SI_SI_SI_SO<float, float, float, float> fn{
+            "Mix Float", [](const float t, const float a, const float b) {
+              return math::interpolate(a, b, t);
+            }};
+        return &fn;
+      }
+    }
+    case SOCK_VECTOR: {
+      if (clamp_factor) {
+        if (uniform_factor) {
+          static fn::CustomMF_SI_SI_SI_SO<float, float3, float3, float3> fn{
+              "Clamp Mix Vector", [](const float t, const float3 a, const float3 b) {
+                return math::interpolate(a, b, std::clamp(t, 0.0f, 1.0f));
+              }};
+          return &fn;
+        }
+        else {
+          static fn::CustomMF_SI_SI_SI_SO<float3, float3, float3, float3> fn{
+              "Clamp Mix Vector Non Uniform", [](float3 t, const float3 a, const float3 b) {
+                t = math::clamp(t, 0.0f, 1.0f);
+                return a * (float3(1.0f) - t) + b * t;
+              }};
+          return &fn;
+        }
+      }
+      else {
+        if (uniform_factor) {
+          static fn::CustomMF_SI_SI_SI_SO<float, float3, float3, float3> fn{
+              "Mix Vector", [](const float t, const float3 a, const float3 b) {
+                return math::interpolate(a, b, t);
+              }};
+          return &fn;
+        }
+        else {
+          static fn::CustomMF_SI_SI_SI_SO<float3, float3, float3, float3> fn{
+              "Mix Vector Non Uniform", [](const float3 t, const float3 a, const float3 b) {
+                return a * (float3(1.0f) - t) + b * t;
+              }};
+          return &fn;
+        }
+      }
+    }
+  }
+  BLI_assert_unreachable();
+  return nullptr;
+}
+
+static void sh_node_mix_build_multi_function(NodeMultiFunctionBuilder &builder)
+{
+  const NodeShaderMix &storage = node_storage(builder.node());
+
+  if (storage.data_type == SOCK_RGBA) {
+    builder.construct_and_set_matching_fn<MixColorFunction>(
+        storage.clamp_factor, storage.clamp_result, storage.blend_type);
+  }
+  else {
+    const fn::MultiFunction *fn = get_multi_function(builder.node());
+    builder.set_matching_fn(fn);
+  }
+}
+
+}  // namespace blender::nodes::node_sh_mix_cc
+
+void register_node_type_sh_mix()
+{
+  namespace file_ns = blender::nodes::node_sh_mix_cc;
+
+  static bNodeType ntype;
+  sh_fn_node_type_base(&ntype, SH_NODE_MIX, "Mix", NODE_CLASS_CONVERTER);
+  ntype.declare = file_ns::sh_node_mix_declare;
+  ntype.ui_class = file_ns::sh_node_mix_ui_class;
+  node_type_gpu(&ntype, file_ns::gpu_shader_mix);
+  node_type_update(&ntype, file_ns::sh_node_mix_update);
+  node_type_init(&ntype, file_ns::node_mix_init);
+  node_type_storage(
+      &ntype, "NodeShaderMix", node_free_standard_storage, node_copy_standard_storage);
+  ntype.build_multi_function = file_ns::sh_node_mix_build_multi_function;
+  ntype.draw_buttons = file_ns::sh_node_mix_layout;
+  ntype.labelfunc = file_ns::sh_node_mix_label;
+  ntype.gather_link_search_ops = file_ns::node_mix_gather_link_searches;
+  nodeRegisterType(&ntype);
+}
diff --git a/source/blender/nodes/shader/nodes/node_shader_mix_rgb.cc b/source/blender/nodes/shader/nodes/node_shader_mix_rgb.cc
index 478a6812c36..46ac8f05803 100644
--- a/source/blender/nodes/shader/nodes/node_shader_mix_rgb.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_mix_rgb.cc
@@ -136,7 +136,7 @@ class MixRGBFunction : public fn::MultiFunction {
 
 static void sh_node_mix_rgb_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &node = builder.node();
+  const bNode &node = builder.node();
   bool clamp = node.custom2 & SHD_MIXRGB_CLAMP;
   int mix_type = node.custom1;
   builder.construct_and_set_matching_fn<MixRGBFunction>(clamp, mix_type);
@@ -150,11 +150,11 @@ void register_node_type_sh_mix_rgb()
 
   static bNodeType ntype;
 
-  sh_fn_node_type_base(&ntype, SH_NODE_MIX_RGB, "Mix", NODE_CLASS_OP_COLOR);
+  sh_fn_node_type_base(&ntype, SH_NODE_MIX_RGB_LEGACY, "Mix", NODE_CLASS_OP_COLOR);
   ntype.declare = file_ns::sh_node_mix_rgb_declare;
   ntype.labelfunc = node_blend_label;
   node_type_gpu(&ntype, file_ns::gpu_shader_mix_rgb);
   ntype.build_multi_function = file_ns::sh_node_mix_rgb_build_multi_function;
-
+  ntype.gather_link_search_ops = nullptr;
   nodeRegisterType(&ntype);
 }
diff --git a/source/blender/nodes/shader/nodes/node_shader_tex_brick.cc b/source/blender/nodes/shader/nodes/node_shader_tex_brick.cc
index cad9e1b33f2..a1c51a440d0 100644
--- a/source/blender/nodes/shader/nodes/node_shader_tex_brick.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_tex_brick.cc
@@ -261,7 +261,7 @@ class BrickFunction : public fn::MultiFunction {
 
 static void sh_node_brick_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &node = builder.node();
+  const bNode &node = builder.node();
   NodeTexBrick *tex = (NodeTexBrick *)node.storage;
 
   builder.construct_and_set_matching_fn<BrickFunction>(
diff --git a/source/blender/nodes/shader/nodes/node_shader_tex_gradient.cc b/source/blender/nodes/shader/nodes/node_shader_tex_gradient.cc
index 8478cbd406b..37c72ec1f17 100644
--- a/source/blender/nodes/shader/nodes/node_shader_tex_gradient.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_tex_gradient.cc
@@ -139,7 +139,7 @@ class GradientFunction : public fn::MultiFunction {
 
 static void sh_node_gradient_tex_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &node = builder.node();
+  const bNode &node = builder.node();
   NodeTexGradient *tex = (NodeTexGradient *)node.storage;
   builder.construct_and_set_matching_fn<GradientFunction>(tex->gradient_type);
 }
diff --git a/source/blender/nodes/shader/nodes/node_shader_tex_magic.cc b/source/blender/nodes/shader/nodes/node_shader_tex_magic.cc
index 95c4a8b8e46..205d3b89016 100644
--- a/source/blender/nodes/shader/nodes/node_shader_tex_magic.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_tex_magic.cc
@@ -161,7 +161,7 @@ class MagicFunction : public fn::MultiFunction {
 
 static void sh_node_magic_tex_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &node = builder.node();
+  const bNode &node = builder.node();
   NodeTexMagic *tex = (NodeTexMagic *)node.storage;
   builder.construct_and_set_matching_fn<MagicFunction>(tex->depth);
 }
diff --git a/source/blender/nodes/shader/nodes/node_shader_tex_musgrave.cc b/source/blender/nodes/shader/nodes/node_shader_tex_musgrave.cc
index c13ce3c3df3..a2241c2327f 100644
--- a/source/blender/nodes/shader/nodes/node_shader_tex_musgrave.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_tex_musgrave.cc
@@ -516,7 +516,7 @@ class MusgraveFunction : public fn::MultiFunction {
 
 static void sh_node_musgrave_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &node = builder.node();
+  const bNode &node = builder.node();
   NodeTexMusgrave *tex = (NodeTexMusgrave *)node.storage;
   builder.construct_and_set_matching_fn<MusgraveFunction>(tex->dimensions, tex->musgrave_type);
 }
diff --git a/source/blender/nodes/shader/nodes/node_shader_tex_wave.cc b/source/blender/nodes/shader/nodes/node_shader_tex_wave.cc
index ad24224dc7f..8475101dbaf 100644
--- a/source/blender/nodes/shader/nodes/node_shader_tex_wave.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_tex_wave.cc
@@ -206,7 +206,7 @@ class WaveFunction : public fn::MultiFunction {
 
 static void sh_node_wave_tex_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &node = builder.node();
+  const bNode &node = builder.node();
   NodeTexWave *tex = (NodeTexWave *)node.storage;
   builder.construct_and_set_matching_fn<WaveFunction>(
       tex->wave_type, tex->bands_direction, tex->rings_direction, tex->wave_profile);
diff --git a/source/blender/nodes/shader/nodes/node_shader_tex_white_noise.cc b/source/blender/nodes/shader/nodes/node_shader_tex_white_noise.cc
index 6d4c491046b..64075a903ab 100644
--- a/source/blender/nodes/shader/nodes/node_shader_tex_white_noise.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_tex_white_noise.cc
@@ -176,7 +176,7 @@ class WhiteNoiseFunction : public fn::MultiFunction {
 
 static void sh_node_noise_build_multi_function(NodeMultiFunctionBuilder &builder)
 {
-  bNode &node = builder.node();
+  const bNode &node = builder.node();
   builder.construct_and_set_matching_fn<WhiteNoiseFunction>((int)node.custom1);
 }
 
diff --git a/source/blender/nodes/shader/nodes/node_shader_vector_math.cc b/source/blender/nodes/shader/nodes/node_shader_vector_math.cc
index 21f5c44c640..d01e03f9d71 100644
--- a/source/blender/nodes/shader/nodes/node_shader_vector_math.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_vector_math.cc
@@ -225,7 +225,7 @@ static void node_shader_update_vector_math(bNodeTree *ntree, bNode *node)
   }
 }
 
-static const fn::MultiFunction *get_multi_function(bNode &node)
+static const fn::MultiFunction *get_multi_function(const bNode &node)
 {
   NodeVectorMathOperation operation = NodeVectorMathOperation(node.custom1);
 
diff --git a/source/blender/nodes/shader/nodes/node_shader_vector_rotate.cc b/source/blender/nodes/shader/nodes/node_shader_vector_rotate.cc
index b35f686e331..a036fc52d84 100644
--- a/source/blender/nodes/shader/nodes/node_shader_vector_rotate.cc
+++ b/source/blender/nodes/shader/nodes/node_shader_vector_rotate.cc
@@ -96,7 +96,7 @@ static float3 sh_node_vector_rotate_euler(const float3 &vector,
   return result + center;
 }
 
-static const fn::MultiFunction *get_multi_function(bNode &node)
+static const fn::MultiFunction *get_multi_function(const bNode &node)
 {
   bool invert = node.custom2;
   const int mode = node.custom1;
diff --git a/source/blender/render/intern/pipeline.cc b/source/blender/render/intern/pipeline.cc
index 8cc1293eae3..746adeaddb2 100644
--- a/source/blender/render/intern/pipeline.cc
+++ b/source/blender/render/intern/pipeline.cc
@@ -1948,15 +1948,17 @@ bool RE_WriteRenderViewsMovie(ReportList *reports,
 
       IMB_colormanagement_imbuf_for_write(ibuf, true, false, &image_format);
 
-      ok &= mh->append_movie(movie_ctx_arr[view_id],
-                             rd,
-                             preview ? scene->r.psfra : scene->r.sfra,
-                             scene->r.cfra,
-                             (int *)ibuf->rect,
-                             ibuf->x,
-                             ibuf->y,
-                             suffix,
-                             reports);
+      if (!mh->append_movie(movie_ctx_arr[view_id],
+                            rd,
+                            preview ? scene->r.psfra : scene->r.sfra,
+                            scene->r.cfra,
+                            (int *)ibuf->rect,
+                            ibuf->x,
+                            ibuf->y,
+                            suffix,
+                            reports)) {
+        ok = false;
+      }
 
       /* imbuf knows which rects are not part of ibuf */
       IMB_freeImBuf(ibuf);
@@ -1979,7 +1981,7 @@ bool RE_WriteRenderViewsMovie(ReportList *reports,
 
     ibuf_arr[2] = IMB_stereo3d_ImBuf(&image_format, ibuf_arr[0], ibuf_arr[1]);
 
-    ok = mh->append_movie(movie_ctx_arr[0],
+    if (!mh->append_movie(movie_ctx_arr[0],
                           rd,
                           preview ? scene->r.psfra : scene->r.sfra,
                           scene->r.cfra,
@@ -1987,7 +1989,9 @@ bool RE_WriteRenderViewsMovie(ReportList *reports,
                           ibuf_arr[2]->x,
                           ibuf_arr[2]->y,
                           "",
-                          reports);
+                          reports)) {
+      ok = false;
+    }
 
     for (i = 0; i < 3; i++) {
       /* imbuf knows which rects are not part of ibuf */
diff --git a/source/blender/windowmanager/intern/wm_event_system.cc b/source/blender/windowmanager/intern/wm_event_system.cc
index 2bba0ac802d..3054708fbdb 100644
--- a/source/blender/windowmanager/intern/wm_event_system.cc
+++ b/source/blender/windowmanager/intern/wm_event_system.cc
@@ -1591,6 +1591,7 @@ static int wm_operator_call_internal(bContext *C,
         case WM_OP_EXEC_AREA:
         case WM_OP_EXEC_SCREEN:
           event = nullptr;
+          break;
         default:
           break;
       }