Merge branch 'master' into temp-T73411-add-scene-parameters

154 files changed, 4007 insertions, 3007 deletions

diff --git a/.clang-format b/.clang-format
index 7e88e6d1cb1..72add4594a4 100644
--- a/.clang-format
+++ b/.clang-format
@@ -273,5 +273,5 @@ StatementMacros:
   - PyObject_VAR_HEAD
   - ccl_gpu_kernel_postfix
 
-MacroBlockBegin: "^BSDF_CLOSURE_CLASS_BEGIN$"
-MacroBlockEnd: "^BSDF_CLOSURE_CLASS_END$"
+MacroBlockBegin: "^OSL_CLOSURE_STRUCT_BEGIN$"
+MacroBlockEnd: "^OSL_CLOSURE_STRUCT_END$"
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9688c711bc7..53859196cfb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -888,7 +888,11 @@ endif()
 if(WITH_CYCLES AND WITH_CYCLES_DEVICE_CUDA AND NOT WITH_CUDA_DYNLOAD)
   find_package(CUDA)
   if(NOT CUDA_FOUND)
-    message(STATUS "CUDA toolkit not found, using dynamic runtime loading of libraries (WITH_CUDA_DYNLOAD) instead")
+    message(
+      STATUS
+      "CUDA toolkit not found, "
+      "using dynamic runtime loading of libraries (WITH_CUDA_DYNLOAD) instead"
+    )
     set(WITH_CUDA_DYNLOAD ON)
   endif()
 endif()
@@ -905,7 +909,8 @@ if(WITH_INTERNATIONAL)
   file(GLOB RESULT "${CMAKE_SOURCE_DIR}/release/datafiles/locale")
   list(LENGTH RESULT DIR_LEN)
   if(DIR_LEN EQUAL 0)
-    message(WARNING
+    message(
+      WARNING
       "Translation path '${CMAKE_SOURCE_DIR}/release/datafiles/locale' is missing, "
       "This is a 'git submodule', which are known not to work with bridges to other version "
       "control systems, disabling 'WITH_INTERNATIONAL'."
@@ -923,13 +928,17 @@ if(WITH_PYTHON)
   # because UNIX will search for the old Python paths which may not exist.
   # giving errors about missing paths before this case is met.
   if(DEFINED PYTHON_VERSION AND "${PYTHON_VERSION}" VERSION_LESS "3.10")
-    message(FATAL_ERROR "At least Python 3.10 is required to build, but found Python ${PYTHON_VERSION}")
+    message(
+      FATAL_ERROR
+      "At least Python 3.10 is required to build, but found Python ${PYTHON_VERSION}"
+    )
   endif()
 
   file(GLOB RESULT "${CMAKE_SOURCE_DIR}/release/scripts/addons")
   list(LENGTH RESULT DIR_LEN)
   if(DIR_LEN EQUAL 0)
-    message(WARNING
+    message(
+      WARNING
       "Addons path '${CMAKE_SOURCE_DIR}/release/scripts/addons' is missing, "
       "This is a 'git submodule', which are known not to work with bridges to other version "
       "control systems: * CONTINUING WITHOUT ADDONS *"
@@ -1037,13 +1046,15 @@ endif()
 
 if(WITH_CYCLES)
   if(NOT WITH_OPENIMAGEIO)
-    message(FATAL_ERROR
+    message(
+      FATAL_ERROR
       "Cycles requires WITH_OPENIMAGEIO, the library may not have been found. "
       "Configure OIIO or disable WITH_CYCLES"
     )
   endif()
   if(NOT WITH_BOOST)
-    message(FATAL_ERROR
+    message(
+      FATAL_ERROR
       "Cycles requires WITH_BOOST, the library may not have been found. "
       "Configure BOOST or disable WITH_CYCLES"
     )
@@ -1051,7 +1062,8 @@ if(WITH_CYCLES)
 
   if(WITH_CYCLES_OSL)
     if(NOT WITH_LLVM)
-      message(FATAL_ERROR
+      message(
+        FATAL_ERROR
         "Cycles OSL requires WITH_LLVM, the library may not have been found. "
         "Configure LLVM or disable WITH_CYCLES_OSL"
       )
@@ -1061,7 +1073,8 @@ endif()
 
 if(WITH_INTERNATIONAL)
   if(NOT WITH_BOOST)
-    message(FATAL_ERROR
+    message(
+      FATAL_ERROR
       "Internationalization requires WITH_BOOST, the library may not have been found. "
       "Configure BOOST or disable WITH_INTERNATIONAL"
     )
@@ -1606,7 +1619,8 @@ endif()
 # be most problematic.
 if(WITH_PYTHON)
   if(NOT EXISTS "${PYTHON_INCLUDE_DIR}/Python.h")
-    message(FATAL_ERROR
+    message(
+      FATAL_ERROR
       "Missing: \"${PYTHON_INCLUDE_DIR}/Python.h\",\n"
       "Set the cache entry 'PYTHON_INCLUDE_DIR' to point "
       "to a valid python include path. Containing "
@@ -1675,9 +1689,11 @@ if(WITH_COMPILER_SHORT_FILE_MACRO)
       if(XCODE AND ${XCODE_VERSION} VERSION_LESS 12.0)
       # Developers may have say LLVM Clang-10.0.1 toolchain (which supports the flag)
       # with Xcode-11 (the Clang of which doesn't support the flag).
-        message(WARNING
+        message(
+          WARNING
           "-fmacro-prefix-map flag is NOT supported by Clang shipped with Xcode-${XCODE_VERSION}."
-          " Some Xcode functionality in Product menu may not work. Disabling WITH_COMPILER_SHORT_FILE_MACRO."
+          " Some Xcode functionality in Product menu may not work. "
+          "Disabling WITH_COMPILER_SHORT_FILE_MACRO."
         )
         set(WITH_COMPILER_SHORT_FILE_MACRO OFF)
       endif()
@@ -1693,7 +1709,8 @@ if(WITH_COMPILER_SHORT_FILE_MACRO)
       unset(_bin_dir)
     endif()
   else()
-    message(WARNING
+    message(
+      WARNING
       "-fmacro-prefix-map flag is NOT supported by C/C++ compiler."
       " Disabling WITH_COMPILER_SHORT_FILE_MACRO."
     )
diff --git a/GNUmakefile b/GNUmakefile
index a82d1bedace..a218b1d226c 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -162,6 +162,7 @@ CPU:=$(shell uname -m)
 # Source and Build DIR's
 BLENDER_DIR:=$(shell pwd -P)
 BUILD_TYPE:=Release
+BLENDER_IS_PYTHON_MODULE:=
 
 # CMake arguments, assigned to local variable to make it mutable.
 CMAKE_CONFIG_ARGS := $(BUILD_CMAKE_ARGS)
@@ -259,6 +260,7 @@ endif
 ifneq "$(findstring bpy, $(MAKECMDGOALS))" ""
 	BUILD_DIR:=$(BUILD_DIR)_bpy
 	CMAKE_CONFIG_ARGS:=-C"$(BLENDER_DIR)/build_files/cmake/config/bpy_module.cmake" $(CMAKE_CONFIG_ARGS)
+	BLENDER_IS_PYTHON_MODULE:=1
 endif
 
 ifneq "$(findstring developer, $(MAKECMDGOALS))" ""
@@ -297,8 +299,10 @@ endif
 # use the default build path can still use utility helpers.
 ifeq ($(OS), Darwin)
 	BLENDER_BIN?="$(BUILD_DIR)/bin/Blender.app/Contents/MacOS/Blender"
+	BLENDER_BIN_DIR?="$(BUILD_DIR)/bin/Blender.app/Contents/MacOS/Blender"
 else
 	BLENDER_BIN?="$(BUILD_DIR)/bin/blender"
+	BLENDER_BIN_DIR?="$(BUILD_DIR)/bin"
 endif
 
 
@@ -355,8 +359,12 @@ all: .FORCE
 	@echo Building Blender ...
 	$(BUILD_COMMAND) -C "$(BUILD_DIR)" -j $(NPROCS) install
 	@echo
-	@echo edit build configuration with: "$(BUILD_DIR)/CMakeCache.txt" run make again to rebuild.
-	@echo Blender successfully built, run from: $(BLENDER_BIN)
+	@echo Edit build configuration with: \"$(BUILD_DIR)/CMakeCache.txt\" run make again to rebuild.
+	@if test "$(BLENDER_IS_PYTHON_MODULE)" == ""; then \
+		echo Blender successfully built, run from: $(BLENDER_BIN); \
+	else \
+		echo Blender successfully built as a Python module, \"bpy\" can be imported from: $(BLENDER_BIN_DIR); \
+	fi
 	@echo
 
 debug: all
diff --git a/build_files/build_environment/install_deps.sh b/build_files/build_environment/install_deps.sh
index 814834ccf34..60665d31521 100755
--- a/build_files/build_environment/install_deps.sh
+++ b/build_files/build_environment/install_deps.sh
@@ -385,7 +385,7 @@ CLANG_FORMAT_VERSION="10.0"
 CLANG_FORMAT_VERSION_MIN="6.0"
 CLANG_FORMAT_VERSION_MEX="14.0"
 
-PYTHON_VERSION="3.10.2"
+PYTHON_VERSION="3.10.6"
 PYTHON_VERSION_SHORT="3.10"
 PYTHON_VERSION_MIN="3.10"
 PYTHON_VERSION_MEX="3.12"
@@ -425,7 +425,7 @@ PYTHON_ZSTANDARD_VERSION_MIN="0.15.2"
 PYTHON_ZSTANDARD_VERSION_MEX="0.20.0"
 PYTHON_ZSTANDARD_NAME="zstandard"
 
-PYTHON_NUMPY_VERSION="1.22.0"
+PYTHON_NUMPY_VERSION="1.23.2"
 PYTHON_NUMPY_VERSION_MIN="1.14"
 PYTHON_NUMPY_VERSION_MEX="2.0"
 PYTHON_NUMPY_NAME="numpy"
@@ -453,8 +453,8 @@ PYTHON_MODULES_PIP=(
 )
 
 
-BOOST_VERSION="1.78.0"
-BOOST_VERSION_SHORT="1.78"
+BOOST_VERSION="1.80.0"
+BOOST_VERSION_SHORT="1.80"
 BOOST_VERSION_MIN="1.49"
 BOOST_VERSION_MEX="2.0"
 BOOST_FORCE_BUILD=false
@@ -496,7 +496,7 @@ OPENEXR_FORCE_REBUILD=false
 OPENEXR_SKIP=false
 _with_built_openexr=false
 
-OIIO_VERSION="2.3.13.0"
+OIIO_VERSION="2.3.18.0"
 OIIO_VERSION_SHORT="2.3"
 OIIO_VERSION_MIN="2.1.12"
 OIIO_VERSION_MEX="2.4.0"
diff --git a/build_files/cmake/project_source_info.py b/build_files/cmake/project_source_info.py
index a544f5733f0..f29d068044c 100644
--- a/build_files/cmake/project_source_info.py
+++ b/build_files/cmake/project_source_info.py
@@ -30,6 +30,8 @@ from typing import (
     cast,
 )
 
+import shlex
+
 
 SOURCE_DIR = join(dirname(__file__), "..", "..")
 SOURCE_DIR = normpath(SOURCE_DIR)
@@ -160,7 +162,7 @@ def build_info(
 
         for c in compilers:
             args = args.replace(c, fake_compiler)
-        args = args.split()
+        args = shlex.split(args)
         # end
 
         # remove compiler
diff --git a/intern/cycles/blender/session.cpp b/intern/cycles/blender/session.cpp
index 321771b67a5..1b7aa38efb4 100644
--- a/intern/cycles/blender/session.cpp
+++ b/intern/cycles/blender/session.cpp
@@ -704,7 +704,7 @@ void BlenderSession::bake(BL::Depsgraph &b_depsgraph_,
     buffer_params.window_width = bake_width;
     buffer_params.window_height = bake_height;
     /* Unique layer name for multi-image baking. */
-    buffer_params.layer = string_printf("bake_%d\n", (int)full_buffer_files_.size());
+    buffer_params.layer = string_printf("bake_%d\n", bake_id++);
 
     /* Update session. */
     session->reset(session_params, buffer_params);
diff --git a/intern/cycles/blender/session.h b/intern/cycles/blender/session.h
index f9a5b6faf7e..ceca86016b8 100644
--- a/intern/cycles/blender/session.h
+++ b/intern/cycles/blender/session.h
@@ -146,6 +146,8 @@ class BlenderSession {
   BlenderDisplayDriver *display_driver_ = nullptr;
 
   vector<string> full_buffer_files_;
+
+  int bake_id = 0;
 };
 
 CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/closure/alloc.h b/intern/cycles/kernel/closure/alloc.h
index 9847898ee89..1cf06614f3b 100644
--- a/intern/cycles/kernel/closure/alloc.h
+++ b/intern/cycles/kernel/closure/alloc.h
@@ -59,39 +59,10 @@ ccl_device_inline ccl_private ShaderClosure *bsdf_alloc(ccl_private ShaderData *
    * we will not allocate new closure. */
   if (sample_weight >= CLOSURE_WEIGHT_CUTOFF) {
     ccl_private ShaderClosure *sc = closure_alloc(sd, size, CLOSURE_NONE_ID, weight);
-    if (sc == NULL) {
-      return NULL;
-    }
-
-    sc->sample_weight = sample_weight;
-
-    return sc;
-  }
-
-  return NULL;
-}
-
-#ifdef __OSL__
-ccl_device_inline ShaderClosure *bsdf_alloc_osl(ShaderData *sd,
-                                                int size,
-                                                Spectrum weight,
-                                                void *data)
-{
-  kernel_assert(isfinite_safe(weight));
-
-  const float sample_weight = fabsf(average(weight));
-
-  /* Use comparison this way to help dealing with non-finite weight: if the average is not finite
-   * we will not allocate new closure. */
-  if (sample_weight >= CLOSURE_WEIGHT_CUTOFF) {
-    ShaderClosure *sc = closure_alloc(sd, size, CLOSURE_NONE_ID, weight);
     if (!sc) {
       return NULL;
     }
 
-    memcpy((void *)sc, data, size);
-
-    sc->weight = weight;
     sc->sample_weight = sample_weight;
 
     return sc;
@@ -99,6 +70,5 @@ ccl_device_inline ShaderClosure *bsdf_alloc_osl(ShaderData *sd,
 
   return NULL;
 }
-#endif
 
 CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/geom/attribute.h b/intern/cycles/kernel/geom/attribute.h
index 31a9e39d528..3a0ee1b09d1 100644
--- a/intern/cycles/kernel/geom/attribute.h
+++ b/intern/cycles/kernel/geom/attribute.h
@@ -16,14 +16,14 @@ CCL_NAMESPACE_BEGIN
 
 /* Patch index for triangle, -1 if not subdivision triangle */
 
-ccl_device_inline uint subd_triangle_patch(KernelGlobals kg, ccl_private const ShaderData *sd)
+ccl_device_inline uint subd_triangle_patch(KernelGlobals kg, int prim)
 {
-  return (sd->prim != PRIM_NONE) ? kernel_data_fetch(tri_patch, sd->prim) : ~0;
+  return (prim != PRIM_NONE) ? kernel_data_fetch(tri_patch, prim) : ~0;
 }
 
-ccl_device_inline uint attribute_primitive_type(KernelGlobals kg, ccl_private const ShaderData *sd)
+ccl_device_inline uint attribute_primitive_type(KernelGlobals kg, int prim, int type)
 {
-  if ((sd->type & PRIMITIVE_TRIANGLE) && subd_triangle_patch(kg, sd) != ~0) {
+  if ((type & PRIMITIVE_TRIANGLE) && subd_triangle_patch(kg, prim) != ~0) {
     return ATTR_PRIM_SUBD;
   }
   else {
@@ -45,17 +45,16 @@ ccl_device_inline uint object_attribute_map_offset(KernelGlobals kg, int object)
   return kernel_data_fetch(objects, object).attribute_map_offset;
 }
 
-ccl_device_inline AttributeDescriptor find_attribute(KernelGlobals kg,
-                                                     ccl_private const ShaderData *sd,
-                                                     uint id)
+ccl_device_inline AttributeDescriptor
+find_attribute(KernelGlobals kg, int object, int prim, int type, uint64_t id)
 {
-  if (sd->object == OBJECT_NONE) {
+  if (object == OBJECT_NONE) {
     return attribute_not_found();
   }
 
   /* for SVM, find attribute by unique id */
-  uint attr_offset = object_attribute_map_offset(kg, sd->object);
-  attr_offset += attribute_primitive_type(kg, sd);
+  uint attr_offset = object_attribute_map_offset(kg, object);
+  attr_offset += attribute_primitive_type(kg, prim, type);
   AttributeMap attr_map = kernel_data_fetch(attributes_map, attr_offset);
 
   while (attr_map.id != id) {
@@ -77,7 +76,7 @@ ccl_device_inline AttributeDescriptor find_attribute(KernelGlobals kg,
   AttributeDescriptor desc;
   desc.element = (AttributeElement)attr_map.element;
 
-  if (sd->prim == PRIM_NONE && desc.element != ATTR_ELEMENT_MESH &&
+  if (prim == PRIM_NONE && desc.element != ATTR_ELEMENT_MESH &&
       desc.element != ATTR_ELEMENT_VOXEL && desc.element != ATTR_ELEMENT_OBJECT) {
     return attribute_not_found();
   }
@@ -91,11 +90,16 @@ ccl_device_inline AttributeDescriptor find_attribute(KernelGlobals kg,
   return desc;
 }
 
+ccl_device_inline AttributeDescriptor find_attribute(KernelGlobals kg,
+                                                     ccl_private const ShaderData *sd,
+                                                     uint64_t id)
+{
+  return find_attribute(kg, sd->object, sd->prim, sd->type, id);
+}
+
 /* Transform matrix attribute on meshes */
 
-ccl_device Transform primitive_attribute_matrix(KernelGlobals kg,
-                                                ccl_private const ShaderData *sd,
-                                                const AttributeDescriptor desc)
+ccl_device Transform primitive_attribute_matrix(KernelGlobals kg, const AttributeDescriptor desc)
 {
   Transform tfm;
 
diff --git a/intern/cycles/kernel/geom/primitive.h b/intern/cycles/kernel/geom/primitive.h
index 0f1a3fc11bc..04b04ff5985 100644
--- a/intern/cycles/kernel/geom/primitive.h
+++ b/intern/cycles/kernel/geom/primitive.h
@@ -25,7 +25,7 @@ ccl_device_forceinline float primitive_surface_attribute_float(KernelGlobals kg,
                                                                ccl_private float *dy)
 {
   if (sd->type & PRIMITIVE_TRIANGLE) {
-    if (subd_triangle_patch(kg, sd) == ~0)
+    if (subd_triangle_patch(kg, sd->prim) == ~0)
       return triangle_attribute_float(kg, sd, desc, dx, dy);
     else
       return subd_triangle_attribute_float(kg, sd, desc, dx, dy);
@@ -56,7 +56,7 @@ ccl_device_forceinline float2 primitive_surface_attribute_float2(KernelGlobals k
                                                                  ccl_private float2 *dy)
 {
   if (sd->type & PRIMITIVE_TRIANGLE) {
-    if (subd_triangle_patch(kg, sd) == ~0)
+    if (subd_triangle_patch(kg, sd->prim) == ~0)
       return triangle_attribute_float2(kg, sd, desc, dx, dy);
     else
       return subd_triangle_attribute_float2(kg, sd, desc, dx, dy);
@@ -87,7 +87,7 @@ ccl_device_forceinline float3 primitive_surface_attribute_float3(KernelGlobals k
                                                                  ccl_private float3 *dy)
 {
   if (sd->type & PRIMITIVE_TRIANGLE) {
-    if (subd_triangle_patch(kg, sd) == ~0)
+    if (subd_triangle_patch(kg, sd->prim) == ~0)
       return triangle_attribute_float3(kg, sd, desc, dx, dy);
     else
       return subd_triangle_attribute_float3(kg, sd, desc, dx, dy);
@@ -118,7 +118,7 @@ ccl_device_forceinline float4 primitive_surface_attribute_float4(KernelGlobals k
                                                                  ccl_private float4 *dy)
 {
   if (sd->type & PRIMITIVE_TRIANGLE) {
-    if (subd_triangle_patch(kg, sd) == ~0)
+    if (subd_triangle_patch(kg, sd->prim) == ~0)
       return triangle_attribute_float4(kg, sd, desc, dx, dy);
     else
       return subd_triangle_attribute_float4(kg, sd, desc, dx, dy);
@@ -320,7 +320,7 @@ ccl_device_forceinline float4 primitive_motion_vector(KernelGlobals kg,
 #endif
         if (sd->type & PRIMITIVE_TRIANGLE) {
       /* Triangle */
-      if (subd_triangle_patch(kg, sd) == ~0) {
+      if (subd_triangle_patch(kg, sd->prim) == ~0) {
         motion_pre = triangle_attribute_float3(kg, sd, desc, NULL, NULL);
         desc.offset += numverts;
         motion_post = triangle_attribute_float3(kg, sd, desc, NULL, NULL);
diff --git a/intern/cycles/kernel/geom/subd_triangle.h b/intern/cycles/kernel/geom/subd_triangle.h
index c6f883461bd..784ba377318 100644
--- a/intern/cycles/kernel/geom/subd_triangle.h
+++ b/intern/cycles/kernel/geom/subd_triangle.h
@@ -87,7 +87,7 @@ ccl_device_noinline float subd_triangle_attribute_float(KernelGlobals kg,
                                                         ccl_private float *dx,
                                                         ccl_private float *dy)
 {
-  int patch = subd_triangle_patch(kg, sd);
+  int patch = subd_triangle_patch(kg, sd->prim);
 
 #ifdef __PATCH_EVAL__
   if (desc.flags & ATTR_SUBDIVIDED) {
@@ -226,7 +226,7 @@ ccl_device_noinline float2 subd_triangle_attribute_float2(KernelGlobals kg,
                                                           ccl_private float2 *dx,
                                                           ccl_private float2 *dy)
 {
-  int patch = subd_triangle_patch(kg, sd);
+  int patch = subd_triangle_patch(kg, sd->prim);
 
 #ifdef __PATCH_EVAL__
   if (desc.flags & ATTR_SUBDIVIDED) {
@@ -368,7 +368,7 @@ ccl_device_noinline float3 subd_triangle_attribute_float3(KernelGlobals kg,
                                                           ccl_private float3 *dx,
                                                           ccl_private float3 *dy)
 {
-  int patch = subd_triangle_patch(kg, sd);
+  int patch = subd_triangle_patch(kg, sd->prim);
 
 #ifdef __PATCH_EVAL__
   if (desc.flags & ATTR_SUBDIVIDED) {
@@ -509,7 +509,7 @@ ccl_device_noinline float4 subd_triangle_attribute_float4(KernelGlobals kg,
                                                           ccl_private float4 *dx,
                                                           ccl_private float4 *dy)
 {
-  int patch = subd_triangle_patch(kg, sd);
+  int patch = subd_triangle_patch(kg, sd->prim);
 
 #ifdef __PATCH_EVAL__
   if (desc.flags & ATTR_SUBDIVIDED) {
diff --git a/intern/cycles/kernel/geom/volume.h b/intern/cycles/kernel/geom/volume.h
index 3510a905def..885a420c97f 100644
--- a/intern/cycles/kernel/geom/volume.h
+++ b/intern/cycles/kernel/geom/volume.h
@@ -29,7 +29,7 @@ ccl_device_inline float3 volume_normalized_position(KernelGlobals kg,
   object_inverse_position_transform(kg, sd, &P);
 
   if (desc.offset != ATTR_STD_NOT_FOUND) {
-    Transform tfm = primitive_attribute_matrix(kg, sd, desc);
+    Transform tfm = primitive_attribute_matrix(kg, desc);
     P = transform_point(&tfm, P);
   }
 
diff --git a/intern/cycles/kernel/osl/CMakeLists.txt b/intern/cycles/kernel/osl/CMakeLists.txt
index 7570490be7c..b27bcb066fd 100644
--- a/intern/cycles/kernel/osl/CMakeLists.txt
+++ b/intern/cycles/kernel/osl/CMakeLists.txt
@@ -10,18 +10,14 @@ set(INC_SYS
 )
 
 set(SRC
-  background.cpp
-  bsdf_diffuse_ramp.cpp
-  bsdf_phong_ramp.cpp
-  emissive.cpp
-  bssrdf.cpp
   closures.cpp
   services.cpp
   shader.cpp
 )
 
 set(HEADER_SRC
-  closures.h
+  closures_setup.h
+  closures_template.h
   globals.h
   services.h
   shader.h
diff --git a/intern/cycles/kernel/osl/background.cpp b/intern/cycles/kernel/osl/background.cpp
deleted file mode 100644
index 4b5a2686117..00000000000
--- a/intern/cycles/kernel/osl/background.cpp
+++ /dev/null
@@ -1,77 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause
- *
- * Adapted from Open Shading Language
- * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
- * All Rights Reserved.
- *
- * Modifications Copyright 2011-2022 Blender Foundation. */
-
-#include <OpenImageIO/fmath.h>
-
-#include <OSL/genclosure.h>
-
-#include "kernel/osl/closures.h"
-
-// clang-format off
-#include "kernel/device/cpu/compat.h"
-#include "kernel/device/cpu/globals.h"
-
-#include "kernel/closure/alloc.h"
-#include "kernel/closure/emissive.h"
-
-#include "kernel/util/color.h"
-// clang-format on
-
-CCL_NAMESPACE_BEGIN
-
-using namespace OSL;
-
-/// Generic background closure
-///
-/// We only have a background closure for the shaders
-/// to return a color in background shaders. No methods,
-/// only the weight is taking into account
-///
-class GenericBackgroundClosure : public CClosurePrimitive {
- public:
-  void setup(ShaderData *sd, uint32_t /* path_flag */, float3 weight)
-  {
-    background_setup(sd, rgb_to_spectrum(weight));
-  }
-};
-
-/// Holdout closure
-///
-/// This will be used by the shader to mark the
-/// amount of holdout for the current shading
-/// point. No parameters, only the weight will be
-/// used
-///
-class HoldoutClosure : CClosurePrimitive {
- public:
-  void setup(ShaderData *sd, uint32_t /* path_flag */, float3 weight)
-  {
-    closure_alloc(sd, sizeof(ShaderClosure), CLOSURE_HOLDOUT_ID, rgb_to_spectrum(weight));
-    sd->flag |= SD_HOLDOUT;
-  }
-};
-
-ClosureParam *closure_background_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_STRING_KEYPARAM(GenericBackgroundClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(GenericBackgroundClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_background_prepare, GenericBackgroundClosure)
-
-ClosureParam *closure_holdout_params()
-{
-  static ClosureParam params[] = {CLOSURE_FINISH_PARAM(HoldoutClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_holdout_prepare, HoldoutClosure)
-
-CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/bsdf_diffuse_ramp.cpp b/intern/cycles/kernel/osl/bsdf_diffuse_ramp.cpp
deleted file mode 100644
index 667207ec6bf..00000000000
--- a/intern/cycles/kernel/osl/bsdf_diffuse_ramp.cpp
+++ /dev/null
@@ -1,68 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause
- *
- * Adapted from Open Shading Language
- * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
- * All Rights Reserved.
- *
- * Modifications Copyright 2011-2022 Blender Foundation. */
-
-#include <OpenImageIO/fmath.h>
-
-#include <OSL/genclosure.h>
-
-#include "kernel/device/cpu/compat.h"
-#include "kernel/osl/closures.h"
-
-// clang-format off
-#include "kernel/device/cpu/compat.h"
-#include "kernel/device/cpu/globals.h"
-
-#include "kernel/types.h"
-#include "kernel/closure/alloc.h"
-#include "kernel/closure/bsdf_diffuse_ramp.h"
-#include "kernel/closure/bsdf_util.h"
-
-#include "kernel/util/color.h"
-// clang-format on
-
-CCL_NAMESPACE_BEGIN
-
-using namespace OSL;
-
-class DiffuseRampClosure : public CBSDFClosure {
- public:
-  DiffuseRampBsdf params;
-  Color3 colors[8];
-
-  void setup(ShaderData *sd, uint32_t /* path_flag */, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    DiffuseRampBsdf *bsdf = (DiffuseRampBsdf *)bsdf_alloc_osl(
-        sd, sizeof(DiffuseRampBsdf), rgb_to_spectrum(weight), &params);
-
-    if (bsdf) {
-      bsdf->colors = (float3 *)closure_alloc_extra(sd, sizeof(float3) * 8);
-
-      if (bsdf->colors) {
-        for (int i = 0; i < 8; i++)
-          bsdf->colors[i] = TO_FLOAT3(colors[i]);
-
-        sd->flag |= bsdf_diffuse_ramp_setup(bsdf);
-      }
-    }
-  }
-};
-
-ClosureParam *closure_bsdf_diffuse_ramp_params()
-{
-  static ClosureParam params[] = {CLOSURE_FLOAT3_PARAM(DiffuseRampClosure, params.N),
-                                  CLOSURE_COLOR_ARRAY_PARAM(DiffuseRampClosure, colors, 8),
-                                  CLOSURE_STRING_KEYPARAM(DiffuseRampClosure, label, "label"),
-                                  CLOSURE_FINISH_PARAM(DiffuseRampClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_bsdf_diffuse_ramp_prepare, DiffuseRampClosure)
-
-CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/bsdf_phong_ramp.cpp b/intern/cycles/kernel/osl/bsdf_phong_ramp.cpp
deleted file mode 100644
index 6f54a96e542..00000000000
--- a/intern/cycles/kernel/osl/bsdf_phong_ramp.cpp
+++ /dev/null
@@ -1,69 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause
- *
- * Adapted from Open Shading Language
- * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
- * All Rights Reserved.
- *
- * Modifications Copyright 2011-2022 Blender Foundation. */
-
-#include <OpenImageIO/fmath.h>
-
-#include <OSL/genclosure.h>
-
-#include "kernel/device/cpu/compat.h"
-#include "kernel/osl/closures.h"
-
-// clang-format off
-#include "kernel/device/cpu/compat.h"
-#include "kernel/device/cpu/globals.h"
-
-#include "kernel/types.h"
-#include "kernel/closure/alloc.h"
-#include "kernel/closure/bsdf_phong_ramp.h"
-#include "kernel/closure/bsdf_util.h"
-
-#include "kernel/util/color.h"
-// clang-format on
-
-CCL_NAMESPACE_BEGIN
-
-using namespace OSL;
-
-class PhongRampClosure : public CBSDFClosure {
- public:
-  PhongRampBsdf params;
-  Color3 colors[8];
-
-  void setup(ShaderData *sd, uint32_t /* path_flag */, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    PhongRampBsdf *bsdf = (PhongRampBsdf *)bsdf_alloc_osl(
-        sd, sizeof(PhongRampBsdf), rgb_to_spectrum(weight), &params);
-
-    if (bsdf) {
-      bsdf->colors = (float3 *)closure_alloc_extra(sd, sizeof(float3) * 8);
-
-      if (bsdf->colors) {
-        for (int i = 0; i < 8; i++)
-          bsdf->colors[i] = TO_FLOAT3(colors[i]);
-
-        sd->flag |= bsdf_phong_ramp_setup(bsdf);
-      }
-    }
-  }
-};
-
-ClosureParam *closure_bsdf_phong_ramp_params()
-{
-  static ClosureParam params[] = {CLOSURE_FLOAT3_PARAM(PhongRampClosure, params.N),
-                                  CLOSURE_FLOAT_PARAM(PhongRampClosure, params.exponent),
-                                  CLOSURE_COLOR_ARRAY_PARAM(PhongRampClosure, colors, 8),
-                                  CLOSURE_STRING_KEYPARAM(PhongRampClosure, label, "label"),
-                                  CLOSURE_FINISH_PARAM(PhongRampClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_bsdf_phong_ramp_prepare, PhongRampClosure)
-
-CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/bssrdf.cpp b/intern/cycles/kernel/osl/bssrdf.cpp
deleted file mode 100644
index 3054946ba5a..00000000000
--- a/intern/cycles/kernel/osl/bssrdf.cpp
+++ /dev/null
@@ -1,105 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause
- *
- * Adapted from Open Shading Language
- * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
- * All Rights Reserved.
- *
- * Modifications Copyright 2011-2022 Blender Foundation. */
-
-#include <OSL/genclosure.h>
-
-#include "kernel/device/cpu/compat.h"
-#include "kernel/osl/closures.h"
-
-// clang-format off
-#include "kernel/device/cpu/compat.h"
-#include "kernel/device/cpu/globals.h"
-
-#include "kernel/types.h"
-
-#include "kernel/closure/alloc.h"
-#include "kernel/closure/bsdf_util.h"
-#include "kernel/closure/bsdf_diffuse.h"
-#include "kernel/closure/bsdf_principled_diffuse.h"
-#include "kernel/closure/bssrdf.h"
-
-#include "kernel/util/color.h"
-// clang-format on
-
-CCL_NAMESPACE_BEGIN
-
-using namespace OSL;
-
-static ustring u_burley("burley");
-static ustring u_random_walk_fixed_radius("random_walk_fixed_radius");
-static ustring u_random_walk("random_walk");
-
-class CBSSRDFClosure : public CClosurePrimitive {
- public:
-  Bssrdf params;
-  float ior;
-  ustring method;
-
-  CBSSRDFClosure()
-  {
-    params.roughness = FLT_MAX;
-    params.anisotropy = 1.0f;
-    ior = 1.4f;
-  }
-
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    if (method == u_burley) {
-      alloc(sd, path_flag, weight, CLOSURE_BSSRDF_BURLEY_ID);
-    }
-    else if (method == u_random_walk_fixed_radius) {
-      alloc(sd, path_flag, weight, CLOSURE_BSSRDF_RANDOM_WALK_FIXED_RADIUS_ID);
-    }
-    else if (method == u_random_walk) {
-      alloc(sd, path_flag, weight, CLOSURE_BSSRDF_RANDOM_WALK_ID);
-    }
-  }
-
-  void alloc(ShaderData *sd, uint32_t path_flag, float3 weight, ClosureType type)
-  {
-    Bssrdf *bssrdf = bssrdf_alloc(sd, rgb_to_spectrum(weight));
-
-    if (bssrdf) {
-      /* disable in case of diffuse ancestor, can't see it well then and
-       * adds considerably noise due to probabilities of continuing path
-       * getting lower and lower */
-      if (path_flag & PATH_RAY_DIFFUSE_ANCESTOR) {
-        params.radius = zero_spectrum();
-      }
-
-      /* create one closure per color channel */
-      bssrdf->radius = params.radius;
-      bssrdf->albedo = params.albedo;
-      bssrdf->N = params.N;
-      bssrdf->roughness = params.roughness;
-      bssrdf->anisotropy = clamp(params.anisotropy, 0.0f, 0.9f);
-      sd->flag |= bssrdf_setup(sd, bssrdf, (ClosureType)type, clamp(ior, 1.01f, 3.8f));
-    }
-  }
-};
-
-ClosureParam *closure_bssrdf_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_STRING_PARAM(CBSSRDFClosure, method),
-      CLOSURE_FLOAT3_PARAM(CBSSRDFClosure, params.N),
-      CLOSURE_FLOAT3_PARAM(CBSSRDFClosure, params.radius),
-      CLOSURE_FLOAT3_PARAM(CBSSRDFClosure, params.albedo),
-      CLOSURE_FLOAT_KEYPARAM(CBSSRDFClosure, params.roughness, "roughness"),
-      CLOSURE_FLOAT_KEYPARAM(CBSSRDFClosure, ior, "ior"),
-      CLOSURE_FLOAT_KEYPARAM(CBSSRDFClosure, params.anisotropy, "anisotropy"),
-      CLOSURE_STRING_KEYPARAM(CBSSRDFClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(CBSSRDFClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_bssrdf_prepare, CBSSRDFClosure)
-
-CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/closures.cpp b/intern/cycles/kernel/osl/closures.cpp
index 8766fb73dbb..604d672063b 100644
--- a/intern/cycles/kernel/osl/closures.cpp
+++ b/intern/cycles/kernel/osl/closures.cpp
@@ -9,999 +9,48 @@
 #include <OSL/genclosure.h>
 #include <OSL/oslclosure.h>
 
-#include "kernel/osl/closures.h"
-#include "kernel/osl/shader.h"
+#include "kernel/types.h"
+
+#include "kernel/osl/globals.h"
+#include "kernel/osl/services.h"
 
 #include "util/math.h"
 #include "util/param.h"
 
-// clang-format off
 #include "kernel/device/cpu/compat.h"
 #include "kernel/device/cpu/globals.h"
 
-#include "kernel/types.h"
-
-#include "kernel/closure/alloc.h"
-#include "kernel/closure/bsdf_util.h"
-#include "kernel/closure/bsdf_ashikhmin_velvet.h"
-#include "kernel/closure/bsdf_diffuse.h"
-#include "kernel/closure/bsdf_microfacet.h"
-#include "kernel/closure/bsdf_microfacet_multi.h"
-#include "kernel/closure/bsdf_oren_nayar.h"
-#include "kernel/closure/bsdf_reflection.h"
-#include "kernel/closure/bsdf_refraction.h"
-#include "kernel/closure/bsdf_transparent.h"
-#include "kernel/closure/bsdf_ashikhmin_shirley.h"
-#include "kernel/closure/bsdf_toon.h"
-#include "kernel/closure/bsdf_hair.h"
-#include "kernel/closure/bsdf_hair_principled.h"
-#include "kernel/closure/bsdf_principled_diffuse.h"
-#include "kernel/closure/bsdf_principled_sheen.h"
-#include "kernel/closure/volume.h"
-
-#include "kernel/util/color.h"
-// clang-format on
+#include "kernel/osl/types.h"
+#include "kernel/osl/closures_setup.h"
 
 CCL_NAMESPACE_BEGIN
 
-using namespace OSL;
-
-/* BSDF class definitions */
-
-BSDF_CLOSURE_CLASS_BEGIN(Diffuse, diffuse, DiffuseBsdf, LABEL_DIFFUSE)
-  BSDF_CLOSURE_FLOAT3_PARAM(DiffuseClosure, params.N)
-BSDF_CLOSURE_CLASS_END(Diffuse, diffuse)
-
-BSDF_CLOSURE_CLASS_BEGIN(Translucent, translucent, DiffuseBsdf, LABEL_DIFFUSE)
-  BSDF_CLOSURE_FLOAT3_PARAM(TranslucentClosure, params.N)
-BSDF_CLOSURE_CLASS_END(Translucent, translucent)
-
-BSDF_CLOSURE_CLASS_BEGIN(OrenNayar, oren_nayar, OrenNayarBsdf, LABEL_DIFFUSE)
-  BSDF_CLOSURE_FLOAT3_PARAM(OrenNayarClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(OrenNayarClosure, params.roughness)
-BSDF_CLOSURE_CLASS_END(OrenNayar, oren_nayar)
-
-BSDF_CLOSURE_CLASS_BEGIN(Reflection, reflection, MicrofacetBsdf, LABEL_SINGULAR)
-  BSDF_CLOSURE_FLOAT3_PARAM(ReflectionClosure, params.N)
-BSDF_CLOSURE_CLASS_END(Reflection, reflection)
-
-BSDF_CLOSURE_CLASS_BEGIN(Refraction, refraction, MicrofacetBsdf, LABEL_SINGULAR)
-  BSDF_CLOSURE_FLOAT3_PARAM(RefractionClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(RefractionClosure, params.ior)
-BSDF_CLOSURE_CLASS_END(Refraction, refraction)
-
-BSDF_CLOSURE_CLASS_BEGIN(AshikhminVelvet, ashikhmin_velvet, VelvetBsdf, LABEL_DIFFUSE)
-  BSDF_CLOSURE_FLOAT3_PARAM(AshikhminVelvetClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(AshikhminVelvetClosure, params.sigma)
-BSDF_CLOSURE_CLASS_END(AshikhminVelvet, ashikhmin_velvet)
-
-BSDF_CLOSURE_CLASS_BEGIN(AshikhminShirley,
-                         ashikhmin_shirley,
-                         MicrofacetBsdf,
-                         LABEL_GLOSSY | LABEL_REFLECT)
-  BSDF_CLOSURE_FLOAT3_PARAM(AshikhminShirleyClosure, params.N)
-  BSDF_CLOSURE_FLOAT3_PARAM(AshikhminShirleyClosure, params.T)
-  BSDF_CLOSURE_FLOAT_PARAM(AshikhminShirleyClosure, params.alpha_x)
-  BSDF_CLOSURE_FLOAT_PARAM(AshikhminShirleyClosure, params.alpha_y)
-BSDF_CLOSURE_CLASS_END(AshikhminShirley, ashikhmin_shirley)
-
-BSDF_CLOSURE_CLASS_BEGIN(DiffuseToon, diffuse_toon, ToonBsdf, LABEL_DIFFUSE)
-  BSDF_CLOSURE_FLOAT3_PARAM(DiffuseToonClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(DiffuseToonClosure, params.size)
-  BSDF_CLOSURE_FLOAT_PARAM(DiffuseToonClosure, params.smooth)
-BSDF_CLOSURE_CLASS_END(DiffuseToon, diffuse_toon)
-
-BSDF_CLOSURE_CLASS_BEGIN(GlossyToon, glossy_toon, ToonBsdf, LABEL_GLOSSY)
-  BSDF_CLOSURE_FLOAT3_PARAM(GlossyToonClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(GlossyToonClosure, params.size)
-  BSDF_CLOSURE_FLOAT_PARAM(GlossyToonClosure, params.smooth)
-BSDF_CLOSURE_CLASS_END(GlossyToon, glossy_toon)
-
-BSDF_CLOSURE_CLASS_BEGIN(MicrofacetGGXIsotropic,
-                         microfacet_ggx_isotropic,
-                         MicrofacetBsdf,
-                         LABEL_GLOSSY | LABEL_REFLECT)
-  BSDF_CLOSURE_FLOAT3_PARAM(MicrofacetGGXIsotropicClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetGGXIsotropicClosure, params.alpha_x)
-BSDF_CLOSURE_CLASS_END(MicrofacetGGXIsotropic, microfacet_ggx_isotropic)
-
-BSDF_CLOSURE_CLASS_BEGIN(MicrofacetGGX,
-                         microfacet_ggx,
-                         MicrofacetBsdf,
-                         LABEL_GLOSSY | LABEL_REFLECT)
-  BSDF_CLOSURE_FLOAT3_PARAM(MicrofacetGGXClosure, params.N)
-  BSDF_CLOSURE_FLOAT3_PARAM(MicrofacetGGXClosure, params.T)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetGGXClosure, params.alpha_x)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetGGXClosure, params.alpha_y)
-BSDF_CLOSURE_CLASS_END(MicrofacetGGX, microfacet_ggx)
-
-BSDF_CLOSURE_CLASS_BEGIN(MicrofacetBeckmannIsotropic,
-                         microfacet_beckmann_isotropic,
-                         MicrofacetBsdf,
-                         LABEL_GLOSSY | LABEL_REFLECT)
-  BSDF_CLOSURE_FLOAT3_PARAM(MicrofacetBeckmannIsotropicClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetBeckmannIsotropicClosure, params.alpha_x)
-BSDF_CLOSURE_CLASS_END(MicrofacetBeckmannIsotropic, microfacet_beckmann_isotropic)
-
-BSDF_CLOSURE_CLASS_BEGIN(MicrofacetBeckmann,
-                         microfacet_beckmann,
-                         MicrofacetBsdf,
-                         LABEL_GLOSSY | LABEL_REFLECT)
-  BSDF_CLOSURE_FLOAT3_PARAM(MicrofacetBeckmannClosure, params.N)
-  BSDF_CLOSURE_FLOAT3_PARAM(MicrofacetBeckmannClosure, params.T)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetBeckmannClosure, params.alpha_x)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetBeckmannClosure, params.alpha_y)
-BSDF_CLOSURE_CLASS_END(MicrofacetBeckmann, microfacet_beckmann)
-
-BSDF_CLOSURE_CLASS_BEGIN(MicrofacetGGXRefraction,
-                         microfacet_ggx_refraction,
-                         MicrofacetBsdf,
-                         LABEL_GLOSSY | LABEL_TRANSMIT)
-  BSDF_CLOSURE_FLOAT3_PARAM(MicrofacetGGXRefractionClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetGGXRefractionClosure, params.alpha_x)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetGGXRefractionClosure, params.ior)
-BSDF_CLOSURE_CLASS_END(MicrofacetGGXRefraction, microfacet_ggx_refraction)
-
-BSDF_CLOSURE_CLASS_BEGIN(MicrofacetBeckmannRefraction,
-                         microfacet_beckmann_refraction,
-                         MicrofacetBsdf,
-                         LABEL_GLOSSY | LABEL_TRANSMIT)
-  BSDF_CLOSURE_FLOAT3_PARAM(MicrofacetBeckmannRefractionClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetBeckmannRefractionClosure, params.alpha_x)
-  BSDF_CLOSURE_FLOAT_PARAM(MicrofacetBeckmannRefractionClosure, params.ior)
-BSDF_CLOSURE_CLASS_END(MicrofacetBeckmannRefraction, microfacet_beckmann_refraction)
-
-BSDF_CLOSURE_CLASS_BEGIN(HairReflection, hair_reflection, HairBsdf, LABEL_GLOSSY)
-  BSDF_CLOSURE_FLOAT3_PARAM(HairReflectionClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(HairReflectionClosure, params.roughness1)
-  BSDF_CLOSURE_FLOAT_PARAM(HairReflectionClosure, params.roughness2)
-  BSDF_CLOSURE_FLOAT3_PARAM(HairReflectionClosure, params.T)
-  BSDF_CLOSURE_FLOAT_PARAM(HairReflectionClosure, params.offset)
-BSDF_CLOSURE_CLASS_END(HairReflection, hair_reflection)
-
-BSDF_CLOSURE_CLASS_BEGIN(HairTransmission, hair_transmission, HairBsdf, LABEL_GLOSSY)
-  BSDF_CLOSURE_FLOAT3_PARAM(HairTransmissionClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(HairTransmissionClosure, params.roughness1)
-  BSDF_CLOSURE_FLOAT_PARAM(HairTransmissionClosure, params.roughness2)
-  BSDF_CLOSURE_FLOAT3_PARAM(HairReflectionClosure, params.T)
-  BSDF_CLOSURE_FLOAT_PARAM(HairReflectionClosure, params.offset)
-BSDF_CLOSURE_CLASS_END(HairTransmission, hair_transmission)
-
-BSDF_CLOSURE_CLASS_BEGIN(PrincipledDiffuse,
-                         principled_diffuse,
-                         PrincipledDiffuseBsdf,
-                         LABEL_DIFFUSE)
-  BSDF_CLOSURE_FLOAT3_PARAM(PrincipledDiffuseClosure, params.N)
-  BSDF_CLOSURE_FLOAT_PARAM(PrincipledDiffuseClosure, params.roughness)
-BSDF_CLOSURE_CLASS_END(PrincipledDiffuse, principled_diffuse)
-
-class PrincipledSheenClosure : public CBSDFClosure {
- public:
-  PrincipledSheenBsdf params;
-
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    if (!skip(sd, path_flag, LABEL_DIFFUSE)) {
-      params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-      PrincipledSheenBsdf *bsdf = (PrincipledSheenBsdf *)bsdf_alloc_osl(
-          sd, sizeof(PrincipledSheenBsdf), rgb_to_spectrum(weight), &params);
-      sd->flag |= (bsdf) ? bsdf_principled_sheen_setup(sd, bsdf) : 0;
-    }
-  }
-};
-
-static ClosureParam *bsdf_principled_sheen_params()
-{
-  static ClosureParam params[] = {CLOSURE_FLOAT3_PARAM(PrincipledSheenClosure, params.N),
-                                  CLOSURE_STRING_KEYPARAM(PrincipledSheenClosure, label, "label"),
-                                  CLOSURE_FINISH_PARAM(PrincipledSheenClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE_STATIC(closure_bsdf_principled_sheen_prepare, PrincipledSheenClosure)
-
-/* PRINCIPLED HAIR BSDF */
-class PrincipledHairClosure : public CBSDFClosure {
- public:
-  PrincipledHairBSDF params;
-
-  PrincipledHairBSDF *alloc(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    PrincipledHairBSDF *bsdf = (PrincipledHairBSDF *)bsdf_alloc_osl(
-        sd, sizeof(PrincipledHairBSDF), rgb_to_spectrum(weight), &params);
-    if (!bsdf) {
-      return NULL;
-    }
-
-    PrincipledHairExtra *extra = (PrincipledHairExtra *)closure_alloc_extra(
-        sd, sizeof(PrincipledHairExtra));
-    if (!extra) {
-      return NULL;
-    }
-
-    bsdf->extra = extra;
-    return bsdf;
-  }
-
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    if (!skip(sd, path_flag, LABEL_GLOSSY)) {
-      params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-      PrincipledHairBSDF *bsdf = (PrincipledHairBSDF *)alloc(sd, path_flag, weight);
-      if (!bsdf) {
-        return;
-      }
-
-      sd->flag |= (bsdf) ? bsdf_principled_hair_setup(sd, bsdf) : 0;
-    }
-  }
-};
-
-static ClosureParam *closure_bsdf_principled_hair_params()
-{
-  static ClosureParam params[] = {CLOSURE_FLOAT3_PARAM(PrincipledHairClosure, params.N),
-                                  CLOSURE_FLOAT3_PARAM(PrincipledHairClosure, params.sigma),
-                                  CLOSURE_FLOAT_PARAM(PrincipledHairClosure, params.v),
-                                  CLOSURE_FLOAT_PARAM(PrincipledHairClosure, params.s),
-                                  CLOSURE_FLOAT_PARAM(PrincipledHairClosure, params.m0_roughness),
-                                  CLOSURE_FLOAT_PARAM(PrincipledHairClosure, params.alpha),
-                                  CLOSURE_FLOAT_PARAM(PrincipledHairClosure, params.eta),
-                                  CLOSURE_STRING_KEYPARAM(PrincipledHairClosure, label, "label"),
-                                  CLOSURE_FINISH_PARAM(PrincipledHairClosure)};
-
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_bsdf_principled_hair_prepare, PrincipledHairClosure)
-
-/* DISNEY PRINCIPLED CLEARCOAT */
-class PrincipledClearcoatClosure : public CBSDFClosure {
- public:
-  MicrofacetBsdf params;
-  float clearcoat, clearcoat_roughness;
-
-  MicrofacetBsdf *alloc(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    MicrofacetBsdf *bsdf = (MicrofacetBsdf *)bsdf_alloc_osl(
-        sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight), &params);
-    if (!bsdf) {
-      return NULL;
-    }
-
-    MicrofacetExtra *extra = (MicrofacetExtra *)closure_alloc_extra(sd, sizeof(MicrofacetExtra));
-    if (!extra) {
-      return NULL;
-    }
-
-    bsdf->T = zero_float3();
-    bsdf->extra = extra;
-    bsdf->ior = 1.5f;
-    bsdf->alpha_x = clearcoat_roughness;
-    bsdf->alpha_y = clearcoat_roughness;
-    bsdf->extra->color = zero_spectrum();
-    bsdf->extra->cspec0 = make_spectrum(0.04f);
-    bsdf->extra->clearcoat = clearcoat;
-    return bsdf;
-  }
-
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    sd->flag |= bsdf_microfacet_ggx_clearcoat_setup(bsdf, sd);
-  }
-};
-
-ClosureParam *closure_bsdf_principled_clearcoat_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(PrincipledClearcoatClosure, params.N),
-      CLOSURE_FLOAT_PARAM(PrincipledClearcoatClosure, clearcoat),
-      CLOSURE_FLOAT_PARAM(PrincipledClearcoatClosure, clearcoat_roughness),
-      CLOSURE_STRING_KEYPARAM(PrincipledClearcoatClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(PrincipledClearcoatClosure)};
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_principled_clearcoat_prepare, PrincipledClearcoatClosure)
-
 /* Registration */
 
-static void register_closure(OSL::ShadingSystem *ss,
-                             const char *name,
-                             int id,
-                             OSL::ClosureParam *params,
-                             OSL::PrepareClosureFunc prepare)
-{
-  /* optimization: it's possible to not use a prepare function at all and
-   * only initialize the actual class when accessing the closure component
-   * data, but then we need to map the id to the class somehow */
-#if OSL_LIBRARY_VERSION_CODE >= 10900
-  ss->register_closure(name, id, params, prepare, NULL);
-#else
-  ss->register_closure(name, id, params, prepare, NULL, 16);
-#endif
-}
-
-void OSLShader::register_closures(OSLShadingSystem *ss_)
-{
-  OSL::ShadingSystem *ss = (OSL::ShadingSystem *)ss_;
-  int id = 0;
-
-  register_closure(ss, "diffuse", id++, bsdf_diffuse_params(), bsdf_diffuse_prepare);
-  register_closure(ss, "oren_nayar", id++, bsdf_oren_nayar_params(), bsdf_oren_nayar_prepare);
-  register_closure(ss, "translucent", id++, bsdf_translucent_params(), bsdf_translucent_prepare);
-  register_closure(ss, "reflection", id++, bsdf_reflection_params(), bsdf_reflection_prepare);
-  register_closure(ss, "refraction", id++, bsdf_refraction_params(), bsdf_refraction_prepare);
-  register_closure(ss,
-                   "transparent",
-                   id++,
-                   closure_bsdf_transparent_params(),
-                   closure_bsdf_transparent_prepare);
-
-  register_closure(
-      ss, "microfacet", id++, closure_bsdf_microfacet_params(), closure_bsdf_microfacet_prepare);
-  register_closure(ss,
-                   "microfacet_ggx",
-                   id++,
-                   bsdf_microfacet_ggx_isotropic_params(),
-                   bsdf_microfacet_ggx_isotropic_prepare);
-  register_closure(
-      ss, "microfacet_ggx_aniso", id++, bsdf_microfacet_ggx_params(), bsdf_microfacet_ggx_prepare);
-  register_closure(ss,
-                   "microfacet_ggx_refraction",
-                   id++,
-                   bsdf_microfacet_ggx_refraction_params(),
-                   bsdf_microfacet_ggx_refraction_prepare);
-  register_closure(ss,
-                   "microfacet_multi_ggx",
-                   id++,
-                   closure_bsdf_microfacet_multi_ggx_params(),
-                   closure_bsdf_microfacet_multi_ggx_prepare);
-  register_closure(ss,
-                   "microfacet_multi_ggx_glass",
-                   id++,
-                   closure_bsdf_microfacet_multi_ggx_glass_params(),
-                   closure_bsdf_microfacet_multi_ggx_glass_prepare);
-  register_closure(ss,
-                   "microfacet_multi_ggx_aniso",
-                   id++,
-                   closure_bsdf_microfacet_multi_ggx_aniso_params(),
-                   closure_bsdf_microfacet_multi_ggx_aniso_prepare);
-  register_closure(ss,
-                   "microfacet_ggx_fresnel",
-                   id++,
-                   closure_bsdf_microfacet_ggx_fresnel_params(),
-                   closure_bsdf_microfacet_ggx_fresnel_prepare);
-  register_closure(ss,
-                   "microfacet_ggx_aniso_fresnel",
-                   id++,
-                   closure_bsdf_microfacet_ggx_aniso_fresnel_params(),
-                   closure_bsdf_microfacet_ggx_aniso_fresnel_prepare);
-  register_closure(ss,
-                   "microfacet_multi_ggx_fresnel",
-                   id++,
-                   closure_bsdf_microfacet_multi_ggx_fresnel_params(),
-                   closure_bsdf_microfacet_multi_ggx_fresnel_prepare);
-  register_closure(ss,
-                   "microfacet_multi_ggx_glass_fresnel",
-                   id++,
-                   closure_bsdf_microfacet_multi_ggx_glass_fresnel_params(),
-                   closure_bsdf_microfacet_multi_ggx_glass_fresnel_prepare);
-  register_closure(ss,
-                   "microfacet_multi_ggx_aniso_fresnel",
-                   id++,
-                   closure_bsdf_microfacet_multi_ggx_aniso_fresnel_params(),
-                   closure_bsdf_microfacet_multi_ggx_aniso_fresnel_prepare);
-  register_closure(ss,
-                   "microfacet_beckmann",
-                   id++,
-                   bsdf_microfacet_beckmann_isotropic_params(),
-                   bsdf_microfacet_beckmann_isotropic_prepare);
-  register_closure(ss,
-                   "microfacet_beckmann_aniso",
-                   id++,
-                   bsdf_microfacet_beckmann_params(),
-                   bsdf_microfacet_beckmann_prepare);
-  register_closure(ss,
-                   "microfacet_beckmann_refraction",
-                   id++,
-                   bsdf_microfacet_beckmann_refraction_params(),
-                   bsdf_microfacet_beckmann_refraction_prepare);
-  register_closure(ss,
-                   "ashikhmin_shirley",
-                   id++,
-                   bsdf_ashikhmin_shirley_params(),
-                   bsdf_ashikhmin_shirley_prepare);
-  register_closure(
-      ss, "ashikhmin_velvet", id++, bsdf_ashikhmin_velvet_params(), bsdf_ashikhmin_velvet_prepare);
-  register_closure(
-      ss, "diffuse_toon", id++, bsdf_diffuse_toon_params(), bsdf_diffuse_toon_prepare);
-  register_closure(ss, "glossy_toon", id++, bsdf_glossy_toon_params(), bsdf_glossy_toon_prepare);
-  register_closure(ss,
-                   "principled_diffuse",
-                   id++,
-                   bsdf_principled_diffuse_params(),
-                   bsdf_principled_diffuse_prepare);
-  register_closure(ss,
-                   "principled_sheen",
-                   id++,
-                   bsdf_principled_sheen_params(),
-                   closure_bsdf_principled_sheen_prepare);
-  register_closure(ss,
-                   "principled_clearcoat",
-                   id++,
-                   closure_bsdf_principled_clearcoat_params(),
-                   closure_bsdf_principled_clearcoat_prepare);
-
-  register_closure(ss, "emission", id++, closure_emission_params(), closure_emission_prepare);
-  register_closure(
-      ss, "background", id++, closure_background_params(), closure_background_prepare);
-  register_closure(ss, "holdout", id++, closure_holdout_params(), closure_holdout_prepare);
-  register_closure(ss,
-                   "diffuse_ramp",
-                   id++,
-                   closure_bsdf_diffuse_ramp_params(),
-                   closure_bsdf_diffuse_ramp_prepare);
-  register_closure(
-      ss, "phong_ramp", id++, closure_bsdf_phong_ramp_params(), closure_bsdf_phong_ramp_prepare);
-  register_closure(ss, "bssrdf", id++, closure_bssrdf_params(), closure_bssrdf_prepare);
-
-  register_closure(
-      ss, "hair_reflection", id++, bsdf_hair_reflection_params(), bsdf_hair_reflection_prepare);
-  register_closure(ss,
-                   "hair_transmission",
-                   id++,
-                   bsdf_hair_transmission_params(),
-                   bsdf_hair_transmission_prepare);
-
-  register_closure(ss,
-                   "principled_hair",
-                   id++,
-                   closure_bsdf_principled_hair_params(),
-                   closure_bsdf_principled_hair_prepare);
-
-  register_closure(ss,
-                   "henyey_greenstein",
-                   id++,
-                   closure_henyey_greenstein_params(),
-                   closure_henyey_greenstein_prepare);
-  register_closure(
-      ss, "absorption", id++, closure_absorption_params(), closure_absorption_prepare);
-}
-
-/* BSDF Closure */
-
-bool CBSDFClosure::skip(const ShaderData *sd, uint32_t path_flag, int scattering)
-{
-  /* caustic options */
-  if ((scattering & LABEL_GLOSSY) && (path_flag & PATH_RAY_DIFFUSE)) {
-    const KernelGlobalsCPU *kg = sd->osl_globals;
-
-    if ((!kernel_data.integrator.caustics_reflective && (scattering & LABEL_REFLECT)) ||
-        (!kernel_data.integrator.caustics_refractive && (scattering & LABEL_TRANSMIT))) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-/* Standard Microfacet Closure */
-
-class MicrofacetClosure : public CBSDFClosure {
- public:
-  MicrofacetBsdf params;
-  ustring distribution;
-  int refract;
-
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    static ustring u_ggx("ggx");
-    static ustring u_default("default");
-
-    const int label = (refract) ? LABEL_TRANSMIT : LABEL_REFLECT;
-    if (skip(sd, path_flag, LABEL_GLOSSY | label)) {
-      return;
-    }
-
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    MicrofacetBsdf *bsdf = (MicrofacetBsdf *)bsdf_alloc_osl(
-        sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight), &params);
-
-    if (!bsdf) {
-      return;
-    }
-
-    /* GGX */
-    if (distribution == u_ggx || distribution == u_default) {
-      if (!refract) {
-        if (params.alpha_x == params.alpha_y) {
-          /* Isotropic */
-          sd->flag |= bsdf_microfacet_ggx_isotropic_setup(bsdf);
-        }
-        else {
-          /* Anisotropic */
-          sd->flag |= bsdf_microfacet_ggx_setup(bsdf);
-        }
-      }
-      else {
-        sd->flag |= bsdf_microfacet_ggx_refraction_setup(bsdf);
-      }
-    }
-    /* Beckmann */
-    else {
-      if (!refract) {
-        if (params.alpha_x == params.alpha_y) {
-          /* Isotropic */
-          sd->flag |= bsdf_microfacet_beckmann_isotropic_setup(bsdf);
-        }
-        else {
-          /* Anisotropic */
-          sd->flag |= bsdf_microfacet_beckmann_setup(bsdf);
-        }
-      }
-      else {
-        sd->flag |= bsdf_microfacet_beckmann_refraction_setup(bsdf);
-      }
-    }
-  }
-};
-
-ClosureParam *closure_bsdf_microfacet_params()
-{
-  static ClosureParam params[] = {CLOSURE_STRING_PARAM(MicrofacetClosure, distribution),
-                                  CLOSURE_FLOAT3_PARAM(MicrofacetClosure, params.N),
-                                  CLOSURE_FLOAT3_PARAM(MicrofacetClosure, params.T),
-                                  CLOSURE_FLOAT_PARAM(MicrofacetClosure, params.alpha_x),
-                                  CLOSURE_FLOAT_PARAM(MicrofacetClosure, params.alpha_y),
-                                  CLOSURE_FLOAT_PARAM(MicrofacetClosure, params.ior),
-                                  CLOSURE_INT_PARAM(MicrofacetClosure, refract),
-                                  CLOSURE_STRING_KEYPARAM(MicrofacetClosure, label, "label"),
-                                  CLOSURE_FINISH_PARAM(MicrofacetClosure)};
-
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_microfacet_prepare, MicrofacetClosure)
-
-/* GGX closures with Fresnel */
-
-class MicrofacetFresnelClosure : public CBSDFClosure {
- public:
-  MicrofacetBsdf params;
-  float3 color;
-  float3 cspec0;
-
-  MicrofacetBsdf *alloc(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    /* Technically, the MultiGGX Glass closure may also transmit. However,
-     * since this is set statically and only used for caustic flags, this
-     * is probably as good as it gets. */
-    if (skip(sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
-      return NULL;
-    }
-
-    MicrofacetBsdf *bsdf = (MicrofacetBsdf *)bsdf_alloc_osl(
-        sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight), &params);
-    if (!bsdf) {
-      return NULL;
-    }
-
-    MicrofacetExtra *extra = (MicrofacetExtra *)closure_alloc_extra(sd, sizeof(MicrofacetExtra));
-    if (!extra) {
-      return NULL;
-    }
-
-    bsdf->extra = extra;
-    bsdf->extra->color = rgb_to_spectrum(color);
-    bsdf->extra->cspec0 = rgb_to_spectrum(cspec0);
-    bsdf->extra->clearcoat = 0.0f;
-    return bsdf;
-  }
-};
-
-class MicrofacetGGXFresnelClosure : public MicrofacetFresnelClosure {
- public:
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    bsdf->T = zero_float3();
-    bsdf->alpha_y = bsdf->alpha_x;
-    sd->flag |= bsdf_microfacet_ggx_fresnel_setup(bsdf, sd);
-  }
-};
-
-ClosureParam *closure_bsdf_microfacet_ggx_fresnel_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(MicrofacetGGXFresnelClosure, params.N),
-      CLOSURE_FLOAT_PARAM(MicrofacetGGXFresnelClosure, params.alpha_x),
-      CLOSURE_FLOAT_PARAM(MicrofacetGGXFresnelClosure, params.ior),
-      CLOSURE_FLOAT3_PARAM(MicrofacetGGXFresnelClosure, color),
-      CLOSURE_FLOAT3_PARAM(MicrofacetGGXFresnelClosure, cspec0),
-      CLOSURE_STRING_KEYPARAM(MicrofacetGGXFresnelClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(MicrofacetGGXFresnelClosure)};
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_microfacet_ggx_fresnel_prepare, MicrofacetGGXFresnelClosure);
-
-class MicrofacetGGXAnisoFresnelClosure : public MicrofacetFresnelClosure {
- public:
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    sd->flag |= bsdf_microfacet_ggx_fresnel_setup(bsdf, sd);
-  }
-};
-
-ClosureParam *closure_bsdf_microfacet_ggx_aniso_fresnel_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(MicrofacetGGXFresnelClosure, params.N),
-      CLOSURE_FLOAT3_PARAM(MicrofacetGGXFresnelClosure, params.T),
-      CLOSURE_FLOAT_PARAM(MicrofacetGGXFresnelClosure, params.alpha_x),
-      CLOSURE_FLOAT_PARAM(MicrofacetGGXFresnelClosure, params.alpha_y),
-      CLOSURE_FLOAT_PARAM(MicrofacetGGXFresnelClosure, params.ior),
-      CLOSURE_FLOAT3_PARAM(MicrofacetGGXFresnelClosure, color),
-      CLOSURE_FLOAT3_PARAM(MicrofacetGGXFresnelClosure, cspec0),
-      CLOSURE_STRING_KEYPARAM(MicrofacetGGXFresnelClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(MicrofacetGGXFresnelClosure)};
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_microfacet_ggx_aniso_fresnel_prepare,
-                 MicrofacetGGXAnisoFresnelClosure);
-
-/* Multiscattering GGX closures */
-
-class MicrofacetMultiClosure : public CBSDFClosure {
- public:
-  MicrofacetBsdf params;
-  float3 color;
-
-  MicrofacetBsdf *alloc(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    /* Technically, the MultiGGX closure may also transmit. However,
-     * since this is set statically and only used for caustic flags, this
-     * is probably as good as it gets. */
-    if (skip(sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
-      return NULL;
-    }
-
-    MicrofacetBsdf *bsdf = (MicrofacetBsdf *)bsdf_alloc_osl(
-        sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight), &params);
-    if (!bsdf) {
-      return NULL;
-    }
-
-    MicrofacetExtra *extra = (MicrofacetExtra *)closure_alloc_extra(sd, sizeof(MicrofacetExtra));
-    if (!extra) {
-      return NULL;
-    }
-
-    bsdf->extra = extra;
-    bsdf->extra->color = rgb_to_spectrum(color);
-    bsdf->extra->cspec0 = zero_spectrum();
-    bsdf->extra->clearcoat = 0.0f;
-    return bsdf;
-  }
-};
-
-class MicrofacetMultiGGXClosure : public MicrofacetMultiClosure {
- public:
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    bsdf->ior = 0.0f;
-    bsdf->T = zero_float3();
-    bsdf->alpha_y = bsdf->alpha_x;
-    sd->flag |= bsdf_microfacet_multi_ggx_setup(bsdf);
-  }
-};
-
-ClosureParam *closure_bsdf_microfacet_multi_ggx_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXClosure, params.N),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXClosure, params.alpha_x),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXClosure, color),
-      CLOSURE_STRING_KEYPARAM(MicrofacetMultiGGXClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(MicrofacetMultiGGXClosure)};
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_microfacet_multi_ggx_prepare, MicrofacetMultiGGXClosure);
-
-class MicrofacetMultiGGXAnisoClosure : public MicrofacetMultiClosure {
- public:
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    bsdf->ior = 0.0f;
-    sd->flag |= bsdf_microfacet_multi_ggx_setup(bsdf);
-  }
-};
-
-ClosureParam *closure_bsdf_microfacet_multi_ggx_aniso_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXClosure, params.N),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXClosure, params.T),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXClosure, params.alpha_x),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXClosure, params.alpha_y),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXClosure, color),
-      CLOSURE_STRING_KEYPARAM(MicrofacetMultiGGXClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(MicrofacetMultiGGXClosure)};
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_microfacet_multi_ggx_aniso_prepare, MicrofacetMultiGGXAnisoClosure);
-
-class MicrofacetMultiGGXGlassClosure : public MicrofacetMultiClosure {
- public:
-  MicrofacetMultiGGXGlassClosure() : MicrofacetMultiClosure()
-  {
-  }
-
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    bsdf->T = zero_float3();
-    bsdf->alpha_y = bsdf->alpha_x;
-    sd->flag |= bsdf_microfacet_multi_ggx_glass_setup(bsdf);
-  }
-};
-
-ClosureParam *closure_bsdf_microfacet_multi_ggx_glass_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXClosure, params.N),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXClosure, params.alpha_x),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXClosure, params.ior),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXClosure, color),
-      CLOSURE_STRING_KEYPARAM(MicrofacetMultiGGXClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(MicrofacetMultiGGXClosure)};
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_microfacet_multi_ggx_glass_prepare, MicrofacetMultiGGXGlassClosure);
-
-/* Multiscattering GGX closures with Fresnel */
-
-class MicrofacetMultiFresnelClosure : public CBSDFClosure {
- public:
-  MicrofacetBsdf params;
-  float3 color;
-  float3 cspec0;
-
-  MicrofacetBsdf *alloc(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    /* Technically, the MultiGGX closure may also transmit. However,
-     * since this is set statically and only used for caustic flags, this
-     * is probably as good as it gets. */
-    if (skip(sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
-      return NULL;
-    }
-
-    MicrofacetBsdf *bsdf = (MicrofacetBsdf *)bsdf_alloc_osl(
-        sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight), &params);
-    if (!bsdf) {
-      return NULL;
-    }
-
-    MicrofacetExtra *extra = (MicrofacetExtra *)closure_alloc_extra(sd, sizeof(MicrofacetExtra));
-    if (!extra) {
-      return NULL;
-    }
-
-    bsdf->extra = extra;
-    bsdf->extra->color = rgb_to_spectrum(color);
-    bsdf->extra->cspec0 = rgb_to_spectrum(cspec0);
-    bsdf->extra->clearcoat = 0.0f;
-    return bsdf;
-  }
-};
-
-class MicrofacetMultiGGXFresnelClosure : public MicrofacetMultiFresnelClosure {
- public:
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    bsdf->T = zero_float3();
-    bsdf->alpha_y = bsdf->alpha_x;
-    sd->flag |= bsdf_microfacet_multi_ggx_fresnel_setup(bsdf, sd);
+#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) \
+  static OSL::ClosureParam *osl_closure_##lower##_params() \
+  { \
+    static OSL::ClosureParam params[] = {
+#define OSL_CLOSURE_STRUCT_END(Upper, lower) \
+  CLOSURE_STRING_KEYPARAM(Upper##Closure, label, "label"), CLOSURE_FINISH_PARAM(Upper##Closure) \
+  } \
+  ; \
+  return params; \
   }
-};
-
-ClosureParam *closure_bsdf_microfacet_multi_ggx_fresnel_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, params.N),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXFresnelClosure, params.alpha_x),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXFresnelClosure, params.ior),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, color),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, cspec0),
-      CLOSURE_STRING_KEYPARAM(MicrofacetMultiGGXFresnelClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(MicrofacetMultiGGXFresnelClosure)};
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_microfacet_multi_ggx_fresnel_prepare,
-                 MicrofacetMultiGGXFresnelClosure);
+#define OSL_CLOSURE_STRUCT_MEMBER(Upper, TYPE, type, name, key) \
+  CLOSURE_##TYPE##_KEYPARAM(Upper##Closure, name, key),
+#define OSL_CLOSURE_STRUCT_ARRAY_MEMBER(Upper, TYPE, type, name, key, size) \
+  CLOSURE_##TYPE##_ARRAY_PARAM(Upper##Closure, name, size),
 
-class MicrofacetMultiGGXAnisoFresnelClosure : public MicrofacetMultiFresnelClosure {
- public:
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
+#include "closures_template.h"
 
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    sd->flag |= bsdf_microfacet_multi_ggx_fresnel_setup(bsdf, sd);
-  }
-};
-
-ClosureParam *closure_bsdf_microfacet_multi_ggx_aniso_fresnel_params()
+void OSLRenderServices::register_closures(OSL::ShadingSystem *ss)
 {
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, params.N),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, params.T),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXFresnelClosure, params.alpha_x),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXFresnelClosure, params.alpha_y),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXFresnelClosure, params.ior),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, color),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, cspec0),
-      CLOSURE_STRING_KEYPARAM(MicrofacetMultiGGXFresnelClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(MicrofacetMultiGGXFresnelClosure)};
-  return params;
-}
-CCLOSURE_PREPARE(closure_bsdf_microfacet_multi_ggx_aniso_fresnel_prepare,
-                 MicrofacetMultiGGXAnisoFresnelClosure);
-
-class MicrofacetMultiGGXGlassFresnelClosure : public MicrofacetMultiFresnelClosure {
- public:
-  MicrofacetMultiGGXGlassFresnelClosure() : MicrofacetMultiFresnelClosure()
-  {
-  }
+#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) \
+  ss->register_closure( \
+      #lower, OSL_CLOSURE_##Upper##_ID, osl_closure_##lower##_params(), nullptr, nullptr);
 
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N);
-
-    MicrofacetBsdf *bsdf = alloc(sd, path_flag, weight);
-    if (!bsdf) {
-      return;
-    }
-
-    bsdf->T = zero_float3();
-    bsdf->alpha_y = bsdf->alpha_x;
-    sd->flag |= bsdf_microfacet_multi_ggx_glass_fresnel_setup(bsdf, sd);
-  }
-};
-
-ClosureParam *closure_bsdf_microfacet_multi_ggx_glass_fresnel_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, params.N),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXFresnelClosure, params.alpha_x),
-      CLOSURE_FLOAT_PARAM(MicrofacetMultiGGXFresnelClosure, params.ior),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, color),
-      CLOSURE_FLOAT3_PARAM(MicrofacetMultiGGXFresnelClosure, cspec0),
-      CLOSURE_STRING_KEYPARAM(MicrofacetMultiGGXFresnelClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(MicrofacetMultiGGXFresnelClosure)};
-  return params;
+#include "closures_template.h"
 }
-CCLOSURE_PREPARE(closure_bsdf_microfacet_multi_ggx_glass_fresnel_prepare,
-                 MicrofacetMultiGGXGlassFresnelClosure);
-
-/* Transparent */
-
-class TransparentClosure : public CBSDFClosure {
- public:
-  ShaderClosure params;
-  float3 unused;
-
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    bsdf_transparent_setup(sd, rgb_to_spectrum(weight), path_flag);
-  }
-};
-
-ClosureParam *closure_bsdf_transparent_params()
-{
-  static ClosureParam params[] = {CLOSURE_STRING_KEYPARAM(TransparentClosure, label, "label"),
-                                  CLOSURE_FINISH_PARAM(TransparentClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_bsdf_transparent_prepare, TransparentClosure)
-
-/* Volume */
-
-class VolumeAbsorptionClosure : public CBSDFClosure {
- public:
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    volume_extinction_setup(sd, rgb_to_spectrum(weight));
-  }
-};
-
-ClosureParam *closure_absorption_params()
-{
-  static ClosureParam params[] = {CLOSURE_STRING_KEYPARAM(VolumeAbsorptionClosure, label, "label"),
-                                  CLOSURE_FINISH_PARAM(VolumeAbsorptionClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_absorption_prepare, VolumeAbsorptionClosure)
-
-class VolumeHenyeyGreensteinClosure : public CBSDFClosure {
- public:
-  HenyeyGreensteinVolume params;
-
-  void setup(ShaderData *sd, uint32_t path_flag, float3 weight)
-  {
-    volume_extinction_setup(sd, rgb_to_spectrum(weight));
-
-    HenyeyGreensteinVolume *volume = (HenyeyGreensteinVolume *)bsdf_alloc_osl(
-        sd, sizeof(HenyeyGreensteinVolume), rgb_to_spectrum(weight), &params);
-    if (!volume) {
-      return;
-    }
-
-    sd->flag |= volume_henyey_greenstein_setup(volume);
-  }
-};
-
-ClosureParam *closure_henyey_greenstein_params()
-{
-  static ClosureParam params[] = {
-      CLOSURE_FLOAT_PARAM(VolumeHenyeyGreensteinClosure, params.g),
-      CLOSURE_STRING_KEYPARAM(VolumeHenyeyGreensteinClosure, label, "label"),
-      CLOSURE_FINISH_PARAM(VolumeHenyeyGreensteinClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_henyey_greenstein_prepare, VolumeHenyeyGreensteinClosure)
 
 CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/closures.h b/intern/cycles/kernel/osl/closures.h
deleted file mode 100644
index 97666be7a1e..00000000000
--- a/intern/cycles/kernel/osl/closures.h
+++ /dev/null
@@ -1,142 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause
- *
- * Adapted from Open Shading Language
- * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
- * All Rights Reserved.
- *
- * Modifications Copyright 2011-2022 Blender Foundation. */
-
-#ifndef __OSL_CLOSURES_H__
-#define __OSL_CLOSURES_H__
-
-#include "kernel/types.h"
-#include "util/types.h"
-
-#include <OSL/genclosure.h>
-#include <OSL/oslclosure.h>
-#include <OSL/oslexec.h>
-
-CCL_NAMESPACE_BEGIN
-
-OSL::ClosureParam *closure_emission_params();
-OSL::ClosureParam *closure_background_params();
-OSL::ClosureParam *closure_holdout_params();
-OSL::ClosureParam *closure_bsdf_diffuse_ramp_params();
-OSL::ClosureParam *closure_bsdf_phong_ramp_params();
-OSL::ClosureParam *closure_bsdf_transparent_params();
-OSL::ClosureParam *closure_bssrdf_params();
-OSL::ClosureParam *closure_absorption_params();
-OSL::ClosureParam *closure_henyey_greenstein_params();
-OSL::ClosureParam *closure_bsdf_microfacet_params();
-OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_params();
-OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_glass_params();
-OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_aniso_params();
-OSL::ClosureParam *closure_bsdf_microfacet_ggx_fresnel_params();
-OSL::ClosureParam *closure_bsdf_microfacet_ggx_aniso_fresnel_params();
-OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_fresnel_params();
-OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_glass_fresnel_params();
-OSL::ClosureParam *closure_bsdf_microfacet_multi_ggx_aniso_fresnel_params();
-OSL::ClosureParam *closure_bsdf_principled_clearcoat_params();
-
-void closure_emission_prepare(OSL::RendererServices *, int id, void *data);
-void closure_background_prepare(OSL::RendererServices *, int id, void *data);
-void closure_holdout_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_diffuse_ramp_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_phong_ramp_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_transparent_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bssrdf_prepare(OSL::RendererServices *, int id, void *data);
-void closure_absorption_prepare(OSL::RendererServices *, int id, void *data);
-void closure_henyey_greenstein_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_microfacet_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_microfacet_multi_ggx_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_microfacet_multi_ggx_glass_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_microfacet_multi_ggx_aniso_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_microfacet_ggx_fresnel_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_microfacet_ggx_aniso_fresnel_prepare(OSL::RendererServices *,
-                                                       int id,
-                                                       void *data);
-void closure_bsdf_microfacet_multi_ggx_fresnel_prepare(OSL::RendererServices *,
-                                                       int id,
-                                                       void *data);
-void closure_bsdf_microfacet_multi_ggx_glass_fresnel_prepare(OSL::RendererServices *,
-                                                             int id,
-                                                             void *data);
-void closure_bsdf_microfacet_multi_ggx_aniso_fresnel_prepare(OSL::RendererServices *,
-                                                             int id,
-                                                             void *data);
-void closure_bsdf_principled_clearcoat_prepare(OSL::RendererServices *, int id, void *data);
-void closure_bsdf_principled_hair_prepare(OSL::RendererServices *, int id, void *data);
-
-#define CCLOSURE_PREPARE(name, classname) \
-  void name(RendererServices *, int id, void *data) \
-  { \
-    memset(data, 0, sizeof(classname)); \
-    new (data) classname(); \
-  }
-
-#define CCLOSURE_PREPARE_STATIC(name, classname) static CCLOSURE_PREPARE(name, classname)
-
-#define CLOSURE_FLOAT3_PARAM(st, fld) \
-  { \
-    TypeDesc::TypeVector, (int)reckless_offsetof(st, fld), NULL, sizeof(OSL::Vec3) \
-  }
-
-#define BSDF_CLOSURE_FLOAT_PARAM(st, fld) CLOSURE_FLOAT_PARAM(st, fld),
-#define BSDF_CLOSURE_FLOAT3_PARAM(st, fld) CLOSURE_FLOAT3_PARAM(st, fld),
-
-#define TO_VEC3(v) OSL::Vec3(v.x, v.y, v.z)
-#define TO_COLOR3(v) OSL::Color3(v.x, v.y, v.z)
-#define TO_FLOAT3(v) make_float3(v[0], v[1], v[2])
-
-/* Closure */
-
-class CClosurePrimitive {
- public:
-  virtual void setup(ShaderData *sd, uint32_t path_flag, float3 weight) = 0;
-
-  OSL::ustring label;
-};
-
-/* BSDF */
-
-class CBSDFClosure : public CClosurePrimitive {
- public:
-  bool skip(const ShaderData *sd, uint32_t path_flag, int scattering);
-};
-
-#define BSDF_CLOSURE_CLASS_BEGIN(Upper, lower, structname, TYPE) \
-\
-  class Upper##Closure : public CBSDFClosure { \
-   public: \
-    structname params; \
-    float3 unused; \
-\
-    void setup(ShaderData *sd, uint32_t path_flag, float3 weight) \
-    { \
-      if (!skip(sd, path_flag, TYPE)) { \
-        params.N = ensure_valid_reflection(sd->Ng, sd->I, params.N); \
-        structname *bsdf = (structname *)bsdf_alloc_osl( \
-            sd, sizeof(structname), rgb_to_spectrum(weight), &params); \
-        sd->flag |= (bsdf) ? bsdf_##lower##_setup(bsdf) : 0; \
-      } \
-    } \
-  }; \
-\
-  static ClosureParam *bsdf_##lower##_params() \
-  { \
-    static ClosureParam params[] = {
-
-/* parameters */
-
-#define BSDF_CLOSURE_CLASS_END(Upper, lower) \
-  CLOSURE_STRING_KEYPARAM(Upper##Closure, label, "label"), CLOSURE_FINISH_PARAM(Upper##Closure) \
-  } \
-  ; \
-  return params; \
-  } \
-\
-  CCLOSURE_PREPARE_STATIC(bsdf_##lower##_prepare, Upper##Closure)
-
-CCL_NAMESPACE_END
-
-#endif /* __OSL_CLOSURES_H__ */
diff --git a/intern/cycles/kernel/osl/closures_setup.h b/intern/cycles/kernel/osl/closures_setup.h
new file mode 100644
index 00000000000..7972bba7d5c
--- /dev/null
+++ b/intern/cycles/kernel/osl/closures_setup.h
@@ -0,0 +1,1166 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Adapted from Open Shading Language
+ * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
+ * All Rights Reserved.
+ *
+ * Modifications Copyright 2011-2022 Blender Foundation. */
+
+#pragma once
+
+// clang-format off
+#include "kernel/closure/alloc.h"
+#include "kernel/closure/bsdf_util.h"
+#include "kernel/closure/bsdf_ashikhmin_velvet.h"
+#include "kernel/closure/bsdf_diffuse.h"
+#include "kernel/closure/bsdf_microfacet.h"
+#include "kernel/closure/bsdf_microfacet_multi.h"
+#include "kernel/closure/bsdf_oren_nayar.h"
+#include "kernel/closure/bsdf_reflection.h"
+#include "kernel/closure/bsdf_refraction.h"
+#include "kernel/closure/bsdf_transparent.h"
+#include "kernel/closure/bsdf_ashikhmin_shirley.h"
+#include "kernel/closure/bsdf_toon.h"
+#include "kernel/closure/bsdf_hair.h"
+#include "kernel/closure/bsdf_hair_principled.h"
+#include "kernel/closure/bsdf_principled_diffuse.h"
+#include "kernel/closure/bsdf_principled_sheen.h"
+#include "kernel/closure/volume.h"
+#include "kernel/closure/bsdf_diffuse_ramp.h"
+#include "kernel/closure/bsdf_phong_ramp.h"
+#include "kernel/closure/bssrdf.h"
+#include "kernel/closure/emissive.h"
+// clang-format on
+
+CCL_NAMESPACE_BEGIN
+
+#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) \
+  struct ccl_align(8) Upper##Closure \
+  { \
+    const char *label;
+#define OSL_CLOSURE_STRUCT_END(Upper, lower) \
+  } \
+  ; \
+  ccl_device void osl_closure_##lower##_setup(KernelGlobals kg, \
+                                              ccl_private ShaderData *sd, \
+                                              uint32_t path_flag, \
+                                              float3 weight, \
+                                              ccl_private Upper##Closure *closure);
+#define OSL_CLOSURE_STRUCT_MEMBER(Upper, TYPE, type, name, key) type name;
+#define OSL_CLOSURE_STRUCT_ARRAY_MEMBER(Upper, TYPE, type, name, key, size) type name[size];
+
+#include "closures_template.h"
+
+ccl_device_forceinline bool osl_closure_skip(KernelGlobals kg,
+                                             ccl_private const ShaderData *sd,
+                                             uint32_t path_flag,
+                                             int scattering)
+{
+  /* caustic options */
+  if ((scattering & LABEL_GLOSSY) && (path_flag & PATH_RAY_DIFFUSE)) {
+    if ((!kernel_data.integrator.caustics_reflective && (scattering & LABEL_REFLECT)) ||
+        (!kernel_data.integrator.caustics_refractive && (scattering & LABEL_TRANSMIT))) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+/* Diffuse */
+
+ccl_device void osl_closure_diffuse_setup(KernelGlobals kg,
+                                          ccl_private ShaderData *sd,
+                                          uint32_t path_flag,
+                                          float3 weight,
+                                          ccl_private const DiffuseClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_DIFFUSE)) {
+    return;
+  }
+
+  ccl_private DiffuseBsdf *bsdf = (ccl_private DiffuseBsdf *)bsdf_alloc(
+      sd, sizeof(DiffuseBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+
+  sd->flag |= bsdf_diffuse_setup(bsdf);
+}
+
+ccl_device void osl_closure_oren_nayar_setup(KernelGlobals kg,
+                                             ccl_private ShaderData *sd,
+                                             uint32_t path_flag,
+                                             float3 weight,
+                                             ccl_private const OrenNayarClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_DIFFUSE)) {
+    return;
+  }
+
+  ccl_private OrenNayarBsdf *bsdf = (ccl_private OrenNayarBsdf *)bsdf_alloc(
+      sd, sizeof(OrenNayarBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->roughness = closure->roughness;
+
+  sd->flag |= bsdf_oren_nayar_setup(bsdf);
+}
+
+ccl_device void osl_closure_translucent_setup(KernelGlobals kg,
+                                              ccl_private ShaderData *sd,
+                                              uint32_t path_flag,
+                                              float3 weight,
+                                              ccl_private const TranslucentClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_DIFFUSE)) {
+    return;
+  }
+
+  ccl_private DiffuseBsdf *bsdf = (ccl_private DiffuseBsdf *)bsdf_alloc(
+      sd, sizeof(DiffuseBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+
+  sd->flag |= bsdf_translucent_setup(bsdf);
+}
+
+ccl_device void osl_closure_reflection_setup(KernelGlobals kg,
+                                             ccl_private ShaderData *sd,
+                                             uint32_t path_flag,
+                                             float3 weight,
+                                             ccl_private const ReflectionClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_SINGULAR)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+
+  sd->flag |= bsdf_reflection_setup(bsdf);
+}
+
+ccl_device void osl_closure_refraction_setup(KernelGlobals kg,
+                                             ccl_private ShaderData *sd,
+                                             uint32_t path_flag,
+                                             float3 weight,
+                                             ccl_private const RefractionClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_SINGULAR)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->ior = closure->ior;
+
+  sd->flag |= bsdf_refraction_setup(bsdf);
+}
+
+ccl_device void osl_closure_transparent_setup(KernelGlobals kg,
+                                              ccl_private ShaderData *sd,
+                                              uint32_t path_flag,
+                                              float3 weight,
+                                              ccl_private const TransparentClosure *closure)
+{
+  bsdf_transparent_setup(sd, rgb_to_spectrum(weight), path_flag);
+}
+
+/* Standard microfacet closures */
+
+ccl_device void osl_closure_microfacet_setup(KernelGlobals kg,
+                                             ccl_private ShaderData *sd,
+                                             uint32_t path_flag,
+                                             float3 weight,
+                                             ccl_private const MicrofacetClosure *closure)
+{
+  const int label = (closure->refract) ? LABEL_TRANSMIT : LABEL_REFLECT;
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | label)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = closure->alpha_y;
+  bsdf->ior = closure->ior;
+  bsdf->T = closure->T;
+
+  static OSL::ustring u_ggx("ggx");
+  static OSL::ustring u_default("default");
+
+  /* GGX */
+  if (closure->distribution == u_ggx || closure->distribution == u_default) {
+    if (!closure->refract) {
+      if (closure->alpha_x == closure->alpha_y) {
+        /* Isotropic */
+        sd->flag |= bsdf_microfacet_ggx_isotropic_setup(bsdf);
+      }
+      else {
+        /* Anisotropic */
+        sd->flag |= bsdf_microfacet_ggx_setup(bsdf);
+      }
+    }
+    else {
+      sd->flag |= bsdf_microfacet_ggx_refraction_setup(bsdf);
+    }
+  }
+  /* Beckmann */
+  else {
+    if (!closure->refract) {
+      if (closure->alpha_x == closure->alpha_y) {
+        /* Isotropic */
+        sd->flag |= bsdf_microfacet_beckmann_isotropic_setup(bsdf);
+      }
+      else {
+        /* Anisotropic */
+        sd->flag |= bsdf_microfacet_beckmann_setup(bsdf);
+      }
+    }
+    else {
+      sd->flag |= bsdf_microfacet_beckmann_refraction_setup(bsdf);
+    }
+  }
+}
+
+ccl_device void osl_closure_microfacet_ggx_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetGGXIsotropicClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+
+  sd->flag |= bsdf_microfacet_ggx_isotropic_setup(bsdf);
+}
+
+ccl_device void osl_closure_microfacet_ggx_aniso_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetGGXClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = closure->alpha_y;
+  bsdf->T = closure->T;
+
+  sd->flag |= bsdf_microfacet_ggx_setup(bsdf);
+}
+
+ccl_device void osl_closure_microfacet_ggx_refraction_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetGGXRefractionClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_TRANSMIT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->ior = closure->ior;
+
+  sd->flag |= bsdf_microfacet_ggx_refraction_setup(bsdf);
+}
+
+/* GGX closures with Fresnel */
+
+ccl_device void osl_closure_microfacet_ggx_fresnel_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetGGXFresnelClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private MicrofacetExtra *extra = (ccl_private MicrofacetExtra *)closure_alloc_extra(
+      sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = bsdf->alpha_x;
+  bsdf->ior = closure->ior;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = rgb_to_spectrum(closure->color);
+  bsdf->extra->cspec0 = rgb_to_spectrum(closure->cspec0);
+  bsdf->extra->clearcoat = 0.0f;
+
+  bsdf->T = zero_float3();
+
+  sd->flag |= bsdf_microfacet_ggx_fresnel_setup(bsdf, sd);
+}
+
+ccl_device void osl_closure_microfacet_ggx_aniso_fresnel_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetGGXAnisoFresnelClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private MicrofacetExtra *extra = (ccl_private MicrofacetExtra *)closure_alloc_extra(
+      sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = closure->alpha_y;
+  bsdf->ior = closure->ior;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = rgb_to_spectrum(closure->color);
+  bsdf->extra->cspec0 = rgb_to_spectrum(closure->cspec0);
+  bsdf->extra->clearcoat = 0.0f;
+
+  bsdf->T = closure->T;
+
+  sd->flag |= bsdf_microfacet_ggx_fresnel_setup(bsdf, sd);
+}
+
+/* Multiscattering GGX closures */
+
+ccl_device void osl_closure_microfacet_multi_ggx_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetMultiGGXClosure *closure)
+{
+  /* Technically, the MultiGGX closure may also transmit. However,
+   * since this is set statically and only used for caustic flags, this
+   * is probably as good as it gets. */
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private MicrofacetExtra *extra = (ccl_private MicrofacetExtra *)closure_alloc_extra(
+      sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = bsdf->alpha_x;
+  bsdf->ior = 0.0f;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = rgb_to_spectrum(closure->color);
+  bsdf->extra->cspec0 = zero_spectrum();
+  bsdf->extra->clearcoat = 0.0f;
+
+  bsdf->T = zero_float3();
+
+  sd->flag |= bsdf_microfacet_multi_ggx_setup(bsdf);
+}
+
+ccl_device void osl_closure_microfacet_multi_ggx_glass_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetMultiGGXGlassClosure *closure)
+{
+  /* Technically, the MultiGGX closure may also transmit. However,
+   * since this is set statically and only used for caustic flags, this
+   * is probably as good as it gets. */
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private MicrofacetExtra *extra = (ccl_private MicrofacetExtra *)closure_alloc_extra(
+      sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = bsdf->alpha_x;
+  bsdf->ior = closure->ior;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = rgb_to_spectrum(closure->color);
+  bsdf->extra->cspec0 = zero_spectrum();
+  bsdf->extra->clearcoat = 0.0f;
+
+  bsdf->T = zero_float3();
+
+  sd->flag |= bsdf_microfacet_multi_ggx_glass_setup(bsdf);
+}
+
+ccl_device void osl_closure_microfacet_multi_ggx_aniso_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetMultiGGXAnisoClosure *closure)
+{
+  /* Technically, the MultiGGX closure may also transmit. However,
+   * since this is set statically and only used for caustic flags, this
+   * is probably as good as it gets. */
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private MicrofacetExtra *extra = (ccl_private MicrofacetExtra *)closure_alloc_extra(
+      sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = closure->alpha_y;
+  bsdf->ior = 0.0f;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = rgb_to_spectrum(closure->color);
+  bsdf->extra->cspec0 = zero_spectrum();
+  bsdf->extra->clearcoat = 0.0f;
+
+  bsdf->T = closure->T;
+
+  sd->flag |= bsdf_microfacet_multi_ggx_setup(bsdf);
+}
+
+/* Multiscattering GGX closures with Fresnel */
+
+ccl_device void osl_closure_microfacet_multi_ggx_fresnel_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetMultiGGXFresnelClosure *closure)
+{
+  /* Technically, the MultiGGX closure may also transmit. However,
+   * since this is set statically and only used for caustic flags, this
+   * is probably as good as it gets. */
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private MicrofacetExtra *extra = (ccl_private MicrofacetExtra *)closure_alloc_extra(
+      sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = bsdf->alpha_x;
+  bsdf->ior = closure->ior;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = rgb_to_spectrum(closure->color);
+  bsdf->extra->cspec0 = rgb_to_spectrum(closure->cspec0);
+  bsdf->extra->clearcoat = 0.0f;
+
+  bsdf->T = zero_float3();
+
+  sd->flag |= bsdf_microfacet_multi_ggx_fresnel_setup(bsdf, sd);
+}
+
+ccl_device void osl_closure_microfacet_multi_ggx_glass_fresnel_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetMultiGGXGlassFresnelClosure *closure)
+{
+  /* Technically, the MultiGGX closure may also transmit. However,
+   * since this is set statically and only used for caustic flags, this
+   * is probably as good as it gets. */
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private MicrofacetExtra *extra = (ccl_private MicrofacetExtra *)closure_alloc_extra(
+      sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = bsdf->alpha_x;
+  bsdf->ior = closure->ior;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = rgb_to_spectrum(closure->color);
+  bsdf->extra->cspec0 = rgb_to_spectrum(closure->cspec0);
+  bsdf->extra->clearcoat = 0.0f;
+
+  bsdf->T = zero_float3();
+
+  sd->flag |= bsdf_microfacet_multi_ggx_glass_fresnel_setup(bsdf, sd);
+}
+
+ccl_device void osl_closure_microfacet_multi_ggx_aniso_fresnel_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetMultiGGXAnisoFresnelClosure *closure)
+{
+  /* Technically, the MultiGGX closure may also transmit. However,
+   * since this is set statically and only used for caustic flags, this
+   * is probably as good as it gets. */
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private MicrofacetExtra *extra = (ccl_private MicrofacetExtra *)closure_alloc_extra(
+      sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = closure->alpha_y;
+  bsdf->ior = closure->ior;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = rgb_to_spectrum(closure->color);
+  bsdf->extra->cspec0 = rgb_to_spectrum(closure->cspec0);
+  bsdf->extra->clearcoat = 0.0f;
+
+  bsdf->T = closure->T;
+
+  sd->flag |= bsdf_microfacet_multi_ggx_fresnel_setup(bsdf, sd);
+}
+
+/* Beckmann closures */
+
+ccl_device void osl_closure_microfacet_beckmann_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetBeckmannIsotropicClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+
+  sd->flag |= bsdf_microfacet_beckmann_isotropic_setup(bsdf);
+}
+
+ccl_device void osl_closure_microfacet_beckmann_aniso_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetBeckmannClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = closure->alpha_y;
+  bsdf->T = closure->T;
+
+  sd->flag |= bsdf_microfacet_beckmann_setup(bsdf);
+}
+
+ccl_device void osl_closure_microfacet_beckmann_refraction_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const MicrofacetBeckmannRefractionClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_TRANSMIT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->ior = closure->ior;
+
+  sd->flag |= bsdf_microfacet_beckmann_refraction_setup(bsdf);
+}
+
+/* Ashikhmin closures */
+
+ccl_device void osl_closure_ashikhmin_velvet_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const AshikhminVelvetClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_DIFFUSE)) {
+    return;
+  }
+
+  ccl_private VelvetBsdf *bsdf = (ccl_private VelvetBsdf *)bsdf_alloc(
+      sd, sizeof(VelvetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->sigma = closure->sigma;
+
+  sd->flag |= bsdf_ashikhmin_velvet_setup(bsdf);
+}
+
+ccl_device void osl_closure_ashikhmin_shirley_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const AshikhminShirleyClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY | LABEL_REFLECT)) {
+    return;
+  }
+
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->alpha_x;
+  bsdf->alpha_y = closure->alpha_y;
+  bsdf->T = closure->T;
+
+  sd->flag |= bsdf_ashikhmin_shirley_setup(bsdf);
+}
+
+ccl_device void osl_closure_diffuse_toon_setup(KernelGlobals kg,
+                                               ccl_private ShaderData *sd,
+                                               uint32_t path_flag,
+                                               float3 weight,
+                                               ccl_private const DiffuseToonClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_DIFFUSE)) {
+    return;
+  }
+
+  ccl_private ToonBsdf *bsdf = (ccl_private ToonBsdf *)bsdf_alloc(
+      sd, sizeof(ToonBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->size = closure->size;
+  bsdf->smooth = closure->smooth;
+
+  sd->flag |= bsdf_diffuse_toon_setup(bsdf);
+}
+
+ccl_device void osl_closure_glossy_toon_setup(KernelGlobals kg,
+                                              ccl_private ShaderData *sd,
+                                              uint32_t path_flag,
+                                              float3 weight,
+                                              ccl_private const GlossyToonClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY)) {
+    return;
+  }
+
+  ccl_private ToonBsdf *bsdf = (ccl_private ToonBsdf *)bsdf_alloc(
+      sd, sizeof(ToonBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->size = closure->size;
+  bsdf->smooth = closure->smooth;
+
+  sd->flag |= bsdf_glossy_toon_setup(bsdf);
+}
+
+/* Disney principled closures */
+
+ccl_device void osl_closure_principled_diffuse_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const PrincipledDiffuseClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_DIFFUSE)) {
+    return;
+  }
+
+  ccl_private PrincipledDiffuseBsdf *bsdf = (ccl_private PrincipledDiffuseBsdf *)bsdf_alloc(
+      sd, sizeof(PrincipledDiffuseBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->roughness = closure->roughness;
+
+  sd->flag |= bsdf_principled_diffuse_setup(bsdf);
+}
+
+ccl_device void osl_closure_principled_sheen_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const PrincipledSheenClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_DIFFUSE)) {
+    return;
+  }
+
+  ccl_private PrincipledSheenBsdf *bsdf = (ccl_private PrincipledSheenBsdf *)bsdf_alloc(
+      sd, sizeof(PrincipledSheenBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->avg_value = 0.0f;
+
+  sd->flag |= bsdf_principled_sheen_setup(sd, bsdf);
+}
+
+ccl_device void osl_closure_principled_clearcoat_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const PrincipledClearcoatClosure *closure)
+{
+  ccl_private MicrofacetBsdf *bsdf = (ccl_private MicrofacetBsdf *)bsdf_alloc(
+      sd, sizeof(MicrofacetBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  MicrofacetExtra *extra = (MicrofacetExtra *)closure_alloc_extra(sd, sizeof(MicrofacetExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->alpha_x = closure->clearcoat_roughness;
+  bsdf->alpha_y = closure->clearcoat_roughness;
+  bsdf->ior = 1.5f;
+
+  bsdf->extra = extra;
+  bsdf->extra->color = zero_spectrum();
+  bsdf->extra->cspec0 = make_spectrum(0.04f);
+  bsdf->extra->clearcoat = closure->clearcoat;
+
+  bsdf->T = zero_float3();
+
+  sd->flag |= bsdf_microfacet_ggx_clearcoat_setup(bsdf, sd);
+}
+
+/* Variable cone emissive closure
+ *
+ * This primitive emits in a cone having a configurable penumbra area where the light decays to 0
+ * reaching the outer_angle limit. It can also behave as a lambertian emitter if the provided
+ * angles are PI/2, which is the default
+ */
+ccl_device void osl_closure_emission_setup(KernelGlobals kg,
+                                           ccl_private ShaderData *sd,
+                                           uint32_t /* path_flag */,
+                                           float3 weight,
+                                           ccl_private const GenericEmissiveClosure *closure)
+{
+  emission_setup(sd, rgb_to_spectrum(weight));
+}
+
+/* Generic background closure
+ *
+ * We only have a background closure for the shaders to return a color in background shaders. No
+ * methods, only the weight is taking into account
+ */
+ccl_device void osl_closure_background_setup(KernelGlobals kg,
+                                             ccl_private ShaderData *sd,
+                                             uint32_t /* path_flag */,
+                                             float3 weight,
+                                             ccl_private const GenericBackgroundClosure *closure)
+{
+  background_setup(sd, rgb_to_spectrum(weight));
+}
+
+/* Holdout closure
+ *
+ * This will be used by the shader to mark the amount of holdout for the current shading point. No
+ * parameters, only the weight will be used
+ */
+ccl_device void osl_closure_holdout_setup(KernelGlobals kg,
+                                          ccl_private ShaderData *sd,
+                                          uint32_t /* path_flag */,
+                                          float3 weight,
+                                          ccl_private const HoldoutClosure *closure)
+{
+  closure_alloc(sd, sizeof(ShaderClosure), CLOSURE_HOLDOUT_ID, rgb_to_spectrum(weight));
+  sd->flag |= SD_HOLDOUT;
+}
+
+ccl_device void osl_closure_diffuse_ramp_setup(KernelGlobals kg,
+                                               ccl_private ShaderData *sd,
+                                               uint32_t /* path_flag */,
+                                               float3 weight,
+                                               ccl_private const DiffuseRampClosure *closure)
+{
+  ccl_private DiffuseRampBsdf *bsdf = (ccl_private DiffuseRampBsdf *)bsdf_alloc(
+      sd, sizeof(DiffuseRampBsdf), rgb_to_spectrum(weight));
+
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+
+  bsdf->colors = (float3 *)closure_alloc_extra(sd, sizeof(float3) * 8);
+  if (!bsdf->colors) {
+    return;
+  }
+
+  for (int i = 0; i < 8; i++)
+    bsdf->colors[i] = closure->colors[i];
+
+  sd->flag |= bsdf_diffuse_ramp_setup(bsdf);
+}
+
+ccl_device void osl_closure_phong_ramp_setup(KernelGlobals kg,
+                                             ccl_private ShaderData *sd,
+                                             uint32_t /* path_flag */,
+                                             float3 weight,
+                                             ccl_private const PhongRampClosure *closure)
+{
+  ccl_private PhongRampBsdf *bsdf = (ccl_private PhongRampBsdf *)bsdf_alloc(
+      sd, sizeof(PhongRampBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->exponent = closure->exponent;
+
+  bsdf->colors = (float3 *)closure_alloc_extra(sd, sizeof(float3) * 8);
+  if (!bsdf->colors) {
+    return;
+  }
+
+  for (int i = 0; i < 8; i++)
+    bsdf->colors[i] = closure->colors[i];
+
+  sd->flag |= bsdf_phong_ramp_setup(bsdf);
+}
+
+ccl_device void osl_closure_bssrdf_setup(KernelGlobals kg,
+                                         ccl_private ShaderData *sd,
+                                         uint32_t path_flag,
+                                         float3 weight,
+                                         ccl_private const BSSRDFClosure *closure)
+{
+  static ustring u_burley("burley");
+  static ustring u_random_walk_fixed_radius("random_walk_fixed_radius");
+  static ustring u_random_walk("random_walk");
+
+  ClosureType type;
+  if (closure->method == u_burley) {
+    type = CLOSURE_BSSRDF_BURLEY_ID;
+  }
+  else if (closure->method == u_random_walk_fixed_radius) {
+    type = CLOSURE_BSSRDF_RANDOM_WALK_FIXED_RADIUS_ID;
+  }
+  else if (closure->method == u_random_walk) {
+    type = CLOSURE_BSSRDF_RANDOM_WALK_ID;
+  }
+  else {
+    return;
+  }
+
+  ccl_private Bssrdf *bssrdf = bssrdf_alloc(sd, rgb_to_spectrum(weight));
+  if (!bssrdf) {
+    return;
+  }
+
+  /* disable in case of diffuse ancestor, can't see it well then and
+   * adds considerably noise due to probabilities of continuing path
+   * getting lower and lower */
+  if (path_flag & PATH_RAY_DIFFUSE_ANCESTOR) {
+    bssrdf->radius = zero_spectrum();
+  }
+  else {
+    bssrdf->radius = closure->radius;
+  }
+
+  /* create one closure per color channel */
+  bssrdf->albedo = closure->albedo;
+  bssrdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bssrdf->roughness = closure->roughness;
+  bssrdf->anisotropy = clamp(closure->anisotropy, 0.0f, 0.9f);
+
+  sd->flag |= bssrdf_setup(sd, bssrdf, type, clamp(closure->ior, 1.01f, 3.8f));
+}
+
+/* Hair */
+
+ccl_device void osl_closure_hair_reflection_setup(KernelGlobals kg,
+                                                  ccl_private ShaderData *sd,
+                                                  uint32_t path_flag,
+                                                  float3 weight,
+                                                  ccl_private const HairReflectionClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY)) {
+    return;
+  }
+
+  ccl_private HairBsdf *bsdf = (ccl_private HairBsdf *)bsdf_alloc(
+      sd, sizeof(HairBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->T = closure->T;
+  bsdf->roughness1 = closure->roughness1;
+  bsdf->roughness2 = closure->roughness2;
+  bsdf->offset = closure->offset;
+
+  sd->flag |= bsdf_hair_reflection_setup(bsdf);
+}
+
+ccl_device void osl_closure_hair_transmission_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const HairTransmissionClosure *closure)
+{
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY)) {
+    return;
+  }
+
+  ccl_private HairBsdf *bsdf = (ccl_private HairBsdf *)bsdf_alloc(
+      sd, sizeof(HairBsdf), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->T = closure->T;
+  bsdf->roughness1 = closure->roughness1;
+  bsdf->roughness2 = closure->roughness2;
+  bsdf->offset = closure->offset;
+
+  sd->flag |= bsdf_hair_transmission_setup(bsdf);
+}
+
+ccl_device void osl_closure_principled_hair_setup(KernelGlobals kg,
+                                                  ccl_private ShaderData *sd,
+                                                  uint32_t path_flag,
+                                                  float3 weight,
+                                                  ccl_private const PrincipledHairClosure *closure)
+{
+#ifdef __HAIR__
+  if (osl_closure_skip(kg, sd, path_flag, LABEL_GLOSSY)) {
+    return;
+  }
+
+  ccl_private PrincipledHairBSDF *bsdf = (ccl_private PrincipledHairBSDF *)bsdf_alloc(
+      sd, sizeof(PrincipledHairBSDF), rgb_to_spectrum(weight));
+  if (!bsdf) {
+    return;
+  }
+
+  ccl_private PrincipledHairExtra *extra = (ccl_private PrincipledHairExtra *)closure_alloc_extra(
+      sd, sizeof(PrincipledHairExtra));
+  if (!extra) {
+    return;
+  }
+
+  bsdf->N = ensure_valid_reflection(sd->Ng, sd->I, closure->N);
+  bsdf->sigma = closure->sigma;
+  bsdf->v = closure->v;
+  bsdf->s = closure->s;
+  bsdf->alpha = closure->alpha;
+  bsdf->eta = closure->eta;
+  bsdf->m0_roughness = closure->m0_roughness;
+
+  bsdf->extra = extra;
+
+  sd->flag |= bsdf_principled_hair_setup(sd, bsdf);
+#endif
+}
+
+/* Volume */
+
+ccl_device void osl_closure_absorption_setup(KernelGlobals kg,
+                                             ccl_private ShaderData *sd,
+                                             uint32_t path_flag,
+                                             float3 weight,
+                                             ccl_private const VolumeAbsorptionClosure *closure)
+{
+  volume_extinction_setup(sd, rgb_to_spectrum(weight));
+}
+
+ccl_device void osl_closure_henyey_greenstein_setup(
+    KernelGlobals kg,
+    ccl_private ShaderData *sd,
+    uint32_t path_flag,
+    float3 weight,
+    ccl_private const VolumeHenyeyGreensteinClosure *closure)
+{
+  volume_extinction_setup(sd, rgb_to_spectrum(weight));
+
+  ccl_private HenyeyGreensteinVolume *volume = (ccl_private HenyeyGreensteinVolume *)bsdf_alloc(
+      sd, sizeof(HenyeyGreensteinVolume), rgb_to_spectrum(weight));
+  if (!volume) {
+    return;
+  }
+
+  volume->g = closure->g;
+
+  sd->flag |= volume_henyey_greenstein_setup(volume);
+}
+
+CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/closures_template.h b/intern/cycles/kernel/osl/closures_template.h
new file mode 100644
index 00000000000..c808b275966
--- /dev/null
+++ b/intern/cycles/kernel/osl/closures_template.h
@@ -0,0 +1,258 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+#ifndef OSL_CLOSURE_STRUCT_BEGIN
+#  define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower)
+#endif
+#ifndef OSL_CLOSURE_STRUCT_END
+#  define OSL_CLOSURE_STRUCT_END(Upper, lower)
+#endif
+#ifndef OSL_CLOSURE_STRUCT_MEMBER
+#  define OSL_CLOSURE_STRUCT_MEMBER(Upper, TYPE, type, name, key)
+#endif
+#ifndef OSL_CLOSURE_STRUCT_ARRAY_MEMBER
+#  define OSL_CLOSURE_STRUCT_ARRAY_MEMBER(Upper, TYPE, type, name, key, size)
+#endif
+
+OSL_CLOSURE_STRUCT_BEGIN(Diffuse, diffuse)
+  OSL_CLOSURE_STRUCT_MEMBER(Diffuse, VECTOR, packed_float3, N, NULL)
+OSL_CLOSURE_STRUCT_END(Diffuse, diffuse)
+
+OSL_CLOSURE_STRUCT_BEGIN(OrenNayar, oren_nayar)
+  OSL_CLOSURE_STRUCT_MEMBER(OrenNayar, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(OrenNayar, FLOAT, float, roughness, NULL)
+OSL_CLOSURE_STRUCT_END(OrenNayar, oren_nayar)
+
+OSL_CLOSURE_STRUCT_BEGIN(Translucent, translucent)
+  OSL_CLOSURE_STRUCT_MEMBER(Translucent, VECTOR, packed_float3, N, NULL)
+OSL_CLOSURE_STRUCT_END(Translucent, translucent)
+
+OSL_CLOSURE_STRUCT_BEGIN(Reflection, reflection)
+  OSL_CLOSURE_STRUCT_MEMBER(Reflection, VECTOR, packed_float3, N, NULL)
+OSL_CLOSURE_STRUCT_END(Reflection, reflection)
+
+OSL_CLOSURE_STRUCT_BEGIN(Refraction, refraction)
+  OSL_CLOSURE_STRUCT_MEMBER(Refraction, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(Refraction, FLOAT, float, ior, NULL)
+OSL_CLOSURE_STRUCT_END(Refraction, refraction)
+
+OSL_CLOSURE_STRUCT_BEGIN(Transparent, transparent)
+OSL_CLOSURE_STRUCT_END(Transparent, transparent)
+
+OSL_CLOSURE_STRUCT_BEGIN(Microfacet, microfacet)
+  OSL_CLOSURE_STRUCT_MEMBER(Microfacet, STRING, ustring, distribution, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(Microfacet, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(Microfacet, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(Microfacet, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(Microfacet, FLOAT, float, alpha_y, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(Microfacet, FLOAT, float, ior, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(Microfacet, INT, int, refract, NULL)
+OSL_CLOSURE_STRUCT_END(Microfacet, microfacet)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetGGXIsotropic, microfacet_ggx)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXIsotropic, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXIsotropic, FLOAT, float, alpha_x, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetGGXIsotropic, microfacet_ggx)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetGGX, microfacet_ggx_aniso)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGX, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGX, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGX, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGX, FLOAT, float, alpha_y, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetGGX, microfacet_ggx_aniso)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetGGXRefraction, microfacet_ggx_refraction)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXRefraction, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXRefraction, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXRefraction, FLOAT, float, ior, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetGGXRefraction, microfacet_ggx_refraction)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetMultiGGX, microfacet_multi_ggx)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGX, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGX, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGX, VECTOR, packed_float3, color, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetMultiGGX, microfacet_multi_ggx)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetMultiGGXGlass, microfacet_multi_ggx_glass)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlass, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlass, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlass, FLOAT, float, ior, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlass, VECTOR, packed_float3, color, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetMultiGGXGlass, microfacet_multi_ggx_glass)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetMultiGGXAniso, microfacet_multi_ggx_aniso)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAniso, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAniso, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAniso, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAniso, FLOAT, float, alpha_y, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAniso, VECTOR, packed_float3, color, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetMultiGGXAniso, microfacet_multi_ggx_aniso)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetGGXFresnel, microfacet_ggx_fresnel)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXFresnel, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXFresnel, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXFresnel, FLOAT, float, ior, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXFresnel, VECTOR, packed_float3, color, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXFresnel, VECTOR, packed_float3, cspec0, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetGGXFresnel, microfacet_ggx_fresnel)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetGGXAnisoFresnel, microfacet_ggx_aniso_fresnel)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXAnisoFresnel, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXAnisoFresnel, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXAnisoFresnel, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXAnisoFresnel, FLOAT, float, alpha_y, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXAnisoFresnel, FLOAT, float, ior, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXAnisoFresnel, VECTOR, packed_float3, color, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetGGXAnisoFresnel, VECTOR, packed_float3, cspec0, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetGGXAnisoFresnel, microfacet_ggx_aniso_fresnel)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetMultiGGXFresnel, microfacet_multi_ggx_fresnel)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXFresnel, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXFresnel, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXFresnel, FLOAT, float, ior, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXFresnel, VECTOR, packed_float3, color, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXFresnel, VECTOR, packed_float3, cspec0, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetMultiGGXFresnel, microfacet_multi_ggx_fresnel)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetMultiGGXGlassFresnel, microfacet_multi_ggx_glass_fresnel)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlassFresnel, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlassFresnel, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlassFresnel, FLOAT, float, ior, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlassFresnel, VECTOR, packed_float3, color, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXGlassFresnel, VECTOR, packed_float3, cspec0, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetMultiGGXGlassFresnel, microfacet_multi_ggx_glass_fresnel)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetMultiGGXAnisoFresnel, microfacet_multi_ggx_aniso_fresnel)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAnisoFresnel, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAnisoFresnel, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAnisoFresnel, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAnisoFresnel, FLOAT, float, alpha_y, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAnisoFresnel, FLOAT, float, ior, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAnisoFresnel, VECTOR, packed_float3, color, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetMultiGGXAnisoFresnel, VECTOR, packed_float3, cspec0, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetMultiGGXAnisoFresnel, microfacet_multi_ggx_aniso_fresnel)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetBeckmannIsotropic, microfacet_beckmann)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmannIsotropic, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmannIsotropic, FLOAT, float, alpha_x, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetBeckmannIsotropic, microfacet_beckmann)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetBeckmann, microfacet_beckmann_aniso)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmann, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmann, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmann, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmann, FLOAT, float, alpha_y, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetBeckmann, microfacet_beckmann_aniso)
+
+OSL_CLOSURE_STRUCT_BEGIN(MicrofacetBeckmannRefraction, microfacet_beckmann_refraction)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmannRefraction, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmannRefraction, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(MicrofacetBeckmannRefraction, FLOAT, float, ior, NULL)
+OSL_CLOSURE_STRUCT_END(MicrofacetBeckmannRefraction, microfacet_beckmann_refraction)
+
+OSL_CLOSURE_STRUCT_BEGIN(AshikhminShirley, ashikhmin_shirley)
+  OSL_CLOSURE_STRUCT_MEMBER(AshikhminShirley, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(AshikhminShirley, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(AshikhminShirley, FLOAT, float, alpha_x, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(AshikhminShirley, FLOAT, float, alpha_y, NULL)
+OSL_CLOSURE_STRUCT_END(AshikhminShirley, ashikhmin_shirley)
+
+OSL_CLOSURE_STRUCT_BEGIN(AshikhminVelvet, ashikhmin_velvet)
+  OSL_CLOSURE_STRUCT_MEMBER(AshikhminVelvet, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(AshikhminVelvet, FLOAT, float, sigma, NULL)
+OSL_CLOSURE_STRUCT_END(AshikhminVelvet, ashikhmin_velvet)
+
+OSL_CLOSURE_STRUCT_BEGIN(DiffuseToon, diffuse_toon)
+  OSL_CLOSURE_STRUCT_MEMBER(DiffuseToon, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(DiffuseToon, FLOAT, float, size, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(DiffuseToon, FLOAT, float, smooth, NULL)
+OSL_CLOSURE_STRUCT_END(DiffuseToon, diffuse_toon)
+
+OSL_CLOSURE_STRUCT_BEGIN(GlossyToon, glossy_toon)
+  OSL_CLOSURE_STRUCT_MEMBER(GlossyToon, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(GlossyToon, FLOAT, float, size, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(GlossyToon, FLOAT, float, smooth, NULL)
+OSL_CLOSURE_STRUCT_END(GlossyToon, glossy_toon)
+
+OSL_CLOSURE_STRUCT_BEGIN(PrincipledDiffuse, principled_diffuse)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledDiffuse, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledDiffuse, FLOAT, float, roughness, NULL)
+OSL_CLOSURE_STRUCT_END(PrincipledDiffuse, principled_diffuse)
+
+OSL_CLOSURE_STRUCT_BEGIN(PrincipledSheen, principled_sheen)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledSheen, VECTOR, packed_float3, N, NULL)
+OSL_CLOSURE_STRUCT_END(PrincipledSheen, principled_sheen)
+
+OSL_CLOSURE_STRUCT_BEGIN(PrincipledClearcoat, principled_clearcoat)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledClearcoat, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledClearcoat, FLOAT, float, clearcoat, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledClearcoat, FLOAT, float, clearcoat_roughness, NULL)
+OSL_CLOSURE_STRUCT_END(PrincipledClearcoat, principled_clearcoat)
+
+OSL_CLOSURE_STRUCT_BEGIN(GenericEmissive, emission)
+OSL_CLOSURE_STRUCT_END(GenericEmissive, emission)
+
+OSL_CLOSURE_STRUCT_BEGIN(GenericBackground, background)
+OSL_CLOSURE_STRUCT_END(GenericBackground, background)
+
+OSL_CLOSURE_STRUCT_BEGIN(Holdout, holdout)
+OSL_CLOSURE_STRUCT_END(Holdout, holdout)
+
+OSL_CLOSURE_STRUCT_BEGIN(DiffuseRamp, diffuse_ramp)
+  OSL_CLOSURE_STRUCT_MEMBER(DiffuseRamp, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_ARRAY_MEMBER(DiffuseRamp, COLOR, packed_float3, colors, NULL, 8)
+OSL_CLOSURE_STRUCT_END(DiffuseRamp, diffuse_ramp)
+
+OSL_CLOSURE_STRUCT_BEGIN(PhongRamp, phong_ramp)
+  OSL_CLOSURE_STRUCT_MEMBER(PhongRamp, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PhongRamp, FLOAT, float, exponent, NULL)
+  OSL_CLOSURE_STRUCT_ARRAY_MEMBER(PhongRamp, COLOR, packed_float3, colors, NULL, 8)
+OSL_CLOSURE_STRUCT_END(PhongRamp, phong_ramp)
+
+OSL_CLOSURE_STRUCT_BEGIN(BSSRDF, bssrdf)
+  OSL_CLOSURE_STRUCT_MEMBER(BSSRDF, STRING, ustring, method, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(BSSRDF, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(BSSRDF, VECTOR, packed_float3, radius, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(BSSRDF, VECTOR, packed_float3, albedo, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(BSSRDF, FLOAT, float, roughness, "roughness")
+  OSL_CLOSURE_STRUCT_MEMBER(BSSRDF, FLOAT, float, ior, "ior")
+  OSL_CLOSURE_STRUCT_MEMBER(BSSRDF, FLOAT, float, anisotropy, "anisotropy")
+OSL_CLOSURE_STRUCT_END(BSSRDF, bssrdf)
+
+OSL_CLOSURE_STRUCT_BEGIN(HairReflection, hair_reflection)
+  OSL_CLOSURE_STRUCT_MEMBER(HairReflection, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(HairReflection, FLOAT, float, roughness1, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(HairReflection, FLOAT, float, roughness2, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(HairReflection, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(HairReflection, FLOAT, float, offset, NULL)
+OSL_CLOSURE_STRUCT_END(HairReflection, hair_reflection)
+
+OSL_CLOSURE_STRUCT_BEGIN(HairTransmission, hair_transmission)
+  OSL_CLOSURE_STRUCT_MEMBER(HairTransmission, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(HairTransmission, FLOAT, float, roughness1, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(HairTransmission, FLOAT, float, roughness2, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(HairReflection, VECTOR, packed_float3, T, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(HairReflection, FLOAT, float, offset, NULL)
+OSL_CLOSURE_STRUCT_END(HairTransmission, hair_transmission)
+
+OSL_CLOSURE_STRUCT_BEGIN(PrincipledHair, principled_hair)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledHair, VECTOR, packed_float3, N, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledHair, VECTOR, packed_float3, sigma, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledHair, FLOAT, float, v, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledHair, FLOAT, float, s, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledHair, FLOAT, float, m0_roughness, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledHair, FLOAT, float, alpha, NULL)
+  OSL_CLOSURE_STRUCT_MEMBER(PrincipledHair, FLOAT, float, eta, NULL)
+OSL_CLOSURE_STRUCT_END(PrincipledHair, principled_hair)
+
+OSL_CLOSURE_STRUCT_BEGIN(VolumeAbsorption, absorption)
+OSL_CLOSURE_STRUCT_END(VolumeAbsorption, absorption)
+
+OSL_CLOSURE_STRUCT_BEGIN(VolumeHenyeyGreenstein, henyey_greenstein)
+  OSL_CLOSURE_STRUCT_MEMBER(VolumeHenyeyGreenstein, FLOAT, float, g, NULL)
+OSL_CLOSURE_STRUCT_END(VolumeHenyeyGreenstein, henyey_greenstein)
+
+#undef OSL_CLOSURE_STRUCT_BEGIN
+#undef OSL_CLOSURE_STRUCT_END
+#undef OSL_CLOSURE_STRUCT_MEMBER
+#undef OSL_CLOSURE_STRUCT_ARRAY_MEMBER
diff --git a/intern/cycles/kernel/osl/emissive.cpp b/intern/cycles/kernel/osl/emissive.cpp
deleted file mode 100644
index 8d1928d0126..00000000000
--- a/intern/cycles/kernel/osl/emissive.cpp
+++ /dev/null
@@ -1,54 +0,0 @@
-/* SPDX-License-Identifier: BSD-3-Clause
- *
- * Adapted from Open Shading Language
- * Copyright (c) 2009-2010 Sony Pictures Imageworks Inc., et al.
- * All Rights Reserved.
- *
- * Modifications Copyright 2011-2022 Blender Foundation. */
-
-#include <OpenImageIO/fmath.h>
-
-#include <OSL/genclosure.h>
-
-#include "kernel/osl/closures.h"
-
-// clang-format off
-#include "kernel/device/cpu/compat.h"
-#include "kernel/device/cpu/globals.h"
-
-#include "kernel/types.h"
-#include "kernel/closure/alloc.h"
-#include "kernel/closure/emissive.h"
-
-#include "kernel/util/color.h"
-// clang-format on
-
-CCL_NAMESPACE_BEGIN
-
-using namespace OSL;
-
-/// Variable cone emissive closure
-///
-/// This primitive emits in a cone having a configurable
-/// penumbra area where the light decays to 0 reaching the
-/// outer_angle limit. It can also behave as a lambertian emitter
-/// if the provided angles are PI/2, which is the default
-///
-class GenericEmissiveClosure : public CClosurePrimitive {
- public:
-  void setup(ShaderData *sd, uint32_t /* path_flag */, float3 weight)
-  {
-    emission_setup(sd, rgb_to_spectrum(weight));
-  }
-};
-
-ClosureParam *closure_emission_params()
-{
-  static ClosureParam params[] = {CLOSURE_STRING_KEYPARAM(GenericEmissiveClosure, label, "label"),
-                                  CLOSURE_FINISH_PARAM(GenericEmissiveClosure)};
-  return params;
-}
-
-CCLOSURE_PREPARE(closure_emission_prepare, GenericEmissiveClosure)
-
-CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/globals.h b/intern/cycles/kernel/osl/globals.h
index 172091c55f5..496965a50ec 100644
--- a/intern/cycles/kernel/osl/globals.h
+++ b/intern/cycles/kernel/osl/globals.h
@@ -56,16 +56,8 @@ struct OSLGlobals {
   OSL::ShaderGroupRef background_state;
 
   /* attributes */
-  struct Attribute {
-    TypeDesc type;
-    AttributeDescriptor desc;
-    ParamValue value;
-  };
-
-  typedef unordered_map<ustring, Attribute, ustringHash> AttributeMap;
   typedef unordered_map<ustring, int, ustringHash> ObjectNameMap;
 
-  vector<AttributeMap> attribute_map;
   ObjectNameMap object_name_map;
   vector<ustring> object_names;
 };
diff --git a/intern/cycles/kernel/osl/services.cpp b/intern/cycles/kernel/osl/services.cpp
index faa027f4e1e..334f06861b2 100644
--- a/intern/cycles/kernel/osl/services.cpp
+++ b/intern/cycles/kernel/osl/services.cpp
@@ -18,7 +18,6 @@
 #include "scene/pointcloud.h"
 #include "scene/scene.h"
 
-#include "kernel/osl/closures.h"
 #include "kernel/osl/globals.h"
 #include "kernel/osl/services.h"
 #include "kernel/osl/shader.h"
@@ -740,76 +739,75 @@ static bool set_attribute_matrix(const Transform &tfm, TypeDesc type, void *val)
   return false;
 }
 
-static bool get_primitive_attribute(const KernelGlobalsCPU *kg,
-                                    const ShaderData *sd,
-                                    const OSLGlobals::Attribute &attr,
-                                    const TypeDesc &type,
-                                    bool derivatives,
-                                    void *val)
+static bool get_object_attribute(const KernelGlobalsCPU *kg,
+                                 ShaderData *sd,
+                                 const AttributeDescriptor &desc,
+                                 const TypeDesc &type,
+                                 bool derivatives,
+                                 void *val)
 {
-  if (attr.type == TypeDesc::TypePoint || attr.type == TypeDesc::TypeVector ||
-      attr.type == TypeDesc::TypeNormal || attr.type == TypeDesc::TypeColor) {
+  if (desc.type == NODE_ATTR_FLOAT3) {
     float3 fval[3];
-    if (primitive_is_volume_attribute(sd, attr.desc)) {
-      fval[0] = primitive_volume_attribute_float3(kg, sd, attr.desc);
+#ifdef __VOLUME__
+    if (primitive_is_volume_attribute(sd, desc)) {
+      fval[0] = primitive_volume_attribute_float3(kg, sd, desc);
     }
-    else {
+    else
+#endif
+    {
       memset(fval, 0, sizeof(fval));
       fval[0] = primitive_surface_attribute_float3(
-          kg, sd, attr.desc, (derivatives) ? &fval[1] : NULL, (derivatives) ? &fval[2] : NULL);
+          kg, sd, desc, (derivatives) ? &fval[1] : NULL, (derivatives) ? &fval[2] : NULL);
     }
     return set_attribute_float3(fval, type, derivatives, val);
   }
-  else if (attr.type == TypeFloat2) {
-    if (primitive_is_volume_attribute(sd, attr.desc)) {
+  else if (desc.type == NODE_ATTR_FLOAT2) {
+#ifdef __VOLUME__
+    if (primitive_is_volume_attribute(sd, desc)) {
       assert(!"Float2 attribute not support for volumes");
       return false;
     }
-    else {
+    else
+#endif
+    {
       float2 fval[3];
       fval[0] = primitive_surface_attribute_float2(
-          kg, sd, attr.desc, (derivatives) ? &fval[1] : NULL, (derivatives) ? &fval[2] : NULL);
+          kg, sd, desc, (derivatives) ? &fval[1] : NULL, (derivatives) ? &fval[2] : NULL);
       return set_attribute_float2(fval, type, derivatives, val);
     }
   }
-  else if (attr.type == TypeDesc::TypeFloat) {
+  else if (desc.type == NODE_ATTR_FLOAT) {
     float fval[3];
-    if (primitive_is_volume_attribute(sd, attr.desc)) {
+#ifdef __VOLUME__
+    if (primitive_is_volume_attribute(sd, desc)) {
       memset(fval, 0, sizeof(fval));
-      fval[0] = primitive_volume_attribute_float(kg, sd, attr.desc);
+      fval[0] = primitive_volume_attribute_float(kg, sd, desc);
     }
-    else {
+    else
+#endif
+    {
       fval[0] = primitive_surface_attribute_float(
-          kg, sd, attr.desc, (derivatives) ? &fval[1] : NULL, (derivatives) ? &fval[2] : NULL);
+          kg, sd, desc, (derivatives) ? &fval[1] : NULL, (derivatives) ? &fval[2] : NULL);
     }
     return set_attribute_float(fval, type, derivatives, val);
   }
-  else if (attr.type == TypeDesc::TypeFloat4 || attr.type == TypeRGBA) {
+  else if (desc.type == NODE_ATTR_FLOAT4 || desc.type == NODE_ATTR_RGBA) {
     float4 fval[3];
-    if (primitive_is_volume_attribute(sd, attr.desc)) {
+#ifdef __VOLUME__
+    if (primitive_is_volume_attribute(sd, desc)) {
       memset(fval, 0, sizeof(fval));
-      fval[0] = primitive_volume_attribute_float4(kg, sd, attr.desc);
+      fval[0] = primitive_volume_attribute_float4(kg, sd, desc);
     }
-    else {
+    else
+#endif
+    {
       fval[0] = primitive_surface_attribute_float4(
-          kg, sd, attr.desc, (derivatives) ? &fval[1] : NULL, (derivatives) ? &fval[2] : NULL);
+          kg, sd, desc, (derivatives) ? &fval[1] : NULL, (derivatives) ? &fval[2] : NULL);
     }
     return set_attribute_float4(fval, type, derivatives, val);
   }
-  else {
-    return false;
-  }
-}
-
-static bool get_mesh_attribute(const KernelGlobalsCPU *kg,
-                               const ShaderData *sd,
-                               const OSLGlobals::Attribute &attr,
-                               const TypeDesc &type,
-                               bool derivatives,
-                               void *val)
-{
-  if (attr.type == TypeDesc::TypeMatrix) {
-    Transform tfm = primitive_attribute_matrix(kg, sd, attr.desc);
+  else if (desc.type == NODE_ATTR_MATRIX) {
+    Transform tfm = primitive_attribute_matrix(kg, desc);
     return set_attribute_matrix(tfm, type, val);
   }
   else {
@@ -817,44 +815,6 @@ static bool get_mesh_attribute(const KernelGlobalsCPU *kg,
   }
 }
 
-static bool get_object_attribute(const OSLGlobals::Attribute &attr,
-                                 TypeDesc type,
-                                 bool derivatives,
-                                 void *val)
-{
-  if (attr.type == TypeDesc::TypePoint || attr.type == TypeDesc::TypeVector ||
-      attr.type == TypeDesc::TypeNormal || attr.type == TypeDesc::TypeColor) {
-    const float *data = (const float *)attr.value.data();
-    return set_attribute_float3(make_float3(data[0], data[1], data[2]), type, derivatives, val);
-  }
-  else if (attr.type == TypeFloat2) {
-    const float *data = (const float *)attr.value.data();
-    return set_attribute_float2(make_float2(data[0], data[1]), type, derivatives, val);
-  }
-  else if (attr.type == TypeDesc::TypeFloat) {
-    const float *data = (const float *)attr.value.data();
-    return set_attribute_float(data[0], type, derivatives, val);
-  }
-  else if (attr.type == TypeRGBA || attr.type == TypeDesc::TypeFloat4) {
-    const float *data = (const float *)attr.value.data();
-    return set_attribute_float4(
-        make_float4(data[0], data[1], data[2], data[3]), type, derivatives, val);
-  }
-  else if (attr.type == type) {
-    size_t datasize = attr.value.datasize();
-
-    memcpy(val, attr.value.data(), datasize);
-    if (derivatives) {
-      memset((char *)val + datasize, 0, datasize * 2);
-    }
-
-    return true;
-  }
-  else {
-    return false;
-  }
-}
-
 bool OSLRenderServices::get_object_standard_attribute(const KernelGlobalsCPU *kg,
                                                       ShaderData *sd,
                                                       ustring name,
@@ -979,6 +939,7 @@ bool OSLRenderServices::get_object_standard_attribute(const KernelGlobalsCPU *kg
     float f = ((sd->shader & SHADER_SMOOTH_NORMAL) != 0);
     return set_attribute_float(f, type, derivatives, val);
   }
+#ifdef __HAIR__
   /* Hair Attributes */
   else if (name == u_is_curve) {
     float f = (sd->type & PRIMITIVE_CURVE) != 0;
@@ -996,6 +957,8 @@ bool OSLRenderServices::get_object_standard_attribute(const KernelGlobalsCPU *kg
     float f = curve_random(kg, sd);
     return set_attribute_float(f, type, derivatives, val);
   }
+#endif
+#ifdef __POINTCLOUD__
   /* point attributes */
   else if (name == u_is_point) {
     float f = (sd->type & PRIMITIVE_POINT) != 0;
@@ -1013,6 +976,7 @@ bool OSLRenderServices::get_object_standard_attribute(const KernelGlobalsCPU *kg
     float f = point_random(kg, sd);
     return set_attribute_float(f, type, derivatives, val);
   }
+#endif
   else if (name == u_normal_map_normal) {
     if (sd->type & PRIMITIVE_TRIANGLE) {
       float3 f = triangle_smooth_normal_unnormalized(kg, sd, sd->Ng, sd->prim, sd->u, sd->v);
@@ -1023,7 +987,7 @@ bool OSLRenderServices::get_object_standard_attribute(const KernelGlobalsCPU *kg
     }
   }
   else {
-    return false;
+    return get_background_attribute(kg, sd, name, type, derivatives, val);
   }
 }
 
@@ -1131,7 +1095,6 @@ bool OSLRenderServices::get_attribute(
     ShaderData *sd, bool derivatives, ustring object_name, TypeDesc type, ustring name, void *val)
 {
   const KernelGlobalsCPU *kg = sd->osl_globals;
-  int prim_type = 0;
   int object;
 
   /* lookup of attribute on another object */
@@ -1145,44 +1108,18 @@ bool OSLRenderServices::get_attribute(
   }
   else {
     object = sd->object;
-    prim_type = attribute_primitive_type(kg, sd);
-
-    if (object == OBJECT_NONE)
-      return get_background_attribute(kg, sd, name, type, derivatives, val);
   }
 
   /* find attribute on object */
-  object = object * ATTR_PRIM_TYPES + prim_type;
-  OSLGlobals::AttributeMap &attribute_map = kg->osl->attribute_map[object];
-  OSLGlobals::AttributeMap::iterator it = attribute_map.find(name);
-
-  if (it != attribute_map.end()) {
-    const OSLGlobals::Attribute &attr = it->second;
-
-    if (attr.desc.element != ATTR_ELEMENT_OBJECT) {
-      /* triangle and vertex attributes */
-      if (get_primitive_attribute(kg, sd, attr, type, derivatives, val))
-        return true;
-      else
-        return get_mesh_attribute(kg, sd, attr, type, derivatives, val);
-    }
-    else {
-      /* object attribute */
-      return get_object_attribute(attr, type, derivatives, val);
-    }
+  const AttributeDescriptor desc = find_attribute(
+      kg, object, sd->prim, object == sd->object ? sd->type : PRIMITIVE_NONE, name.hash());
+  if (desc.offset != ATTR_STD_NOT_FOUND) {
+    return get_object_attribute(kg, sd, desc, type, derivatives, val);
   }
   else {
     /* not found in attribute, check standard object info */
-    bool is_std_object_attribute = get_object_standard_attribute(
-        kg, sd, name, type, derivatives, val);
-
-    if (is_std_object_attribute)
-      return true;
-
-    return get_background_attribute(kg, sd, name, type, derivatives, val);
+    return get_object_standard_attribute(kg, sd, name, type, derivatives, val);
   }
-
-  return false;
 }
 
 bool OSLRenderServices::get_userdata(
@@ -1667,8 +1604,8 @@ bool OSLRenderServices::trace(TraceOpt &options,
   /* setup ray */
   Ray ray;
 
-  ray.P = TO_FLOAT3(P);
-  ray.D = TO_FLOAT3(R);
+  ray.P = make_float3(P.x, P.y, P.z);
+  ray.D = make_float3(R.x, R.y, R.z);
   ray.tmin = 0.0f;
   ray.tmax = (options.maxdist == 1.0e30f) ? FLT_MAX : options.maxdist - options.mindist;
   ray.time = sd->time;
@@ -1691,12 +1628,12 @@ bool OSLRenderServices::trace(TraceOpt &options,
 
   /* ray differentials */
   differential3 dP;
-  dP.dx = TO_FLOAT3(dPdx);
-  dP.dy = TO_FLOAT3(dPdy);
+  dP.dx = make_float3(dPdx.x, dPdx.y, dPdx.z);
+  dP.dy = make_float3(dPdy.x, dPdy.y, dPdy.z);
   ray.dP = differential_make_compact(dP);
   differential3 dD;
-  dD.dx = TO_FLOAT3(dRdx);
-  dD.dy = TO_FLOAT3(dRdy);
+  dD.dx = make_float3(dRdx.x, dRdx.y, dRdx.z);
+  dD.dy = make_float3(dRdy.x, dRdy.y, dRdy.z);
   ray.dD = differential_make_compact(dD);
 
   /* allocate trace data */
diff --git a/intern/cycles/kernel/osl/services.h b/intern/cycles/kernel/osl/services.h
index edffd912bad..eb4e35f80a2 100644
--- a/intern/cycles/kernel/osl/services.h
+++ b/intern/cycles/kernel/osl/services.h
@@ -76,6 +76,8 @@ class OSLRenderServices : public OSL::RendererServices {
   OSLRenderServices(OSL::TextureSystem *texture_system);
   ~OSLRenderServices();
 
+  static void register_closures(OSL::ShadingSystem *ss);
+
   bool get_matrix(OSL::ShaderGlobals *sg,
                   OSL::Matrix44 &result,
                   OSL::TransformationPtr xform,
diff --git a/intern/cycles/kernel/osl/shader.cpp b/intern/cycles/kernel/osl/shader.cpp
index 5862b6a8a2b..83fdfab1217 100644
--- a/intern/cycles/kernel/osl/shader.cpp
+++ b/intern/cycles/kernel/osl/shader.cpp
@@ -13,15 +13,18 @@
 
 #include "kernel/integrator/state.h"
 
-#include "kernel/osl/closures.h"
 #include "kernel/osl/globals.h"
 #include "kernel/osl/services.h"
 #include "kernel/osl/shader.h"
 
+#include "kernel/osl/types.h"
+#include "kernel/osl/closures_setup.h"
+
 #include "kernel/util/differential.h"
 // clang-format on
 
-#include "scene/attribute.h"
+#define TO_VEC3(v) OSL::Vec3(v.x, v.y, v.z)
+#define TO_FLOAT3(v) make_float3(v[0], v[1], v[2])
 
 CCL_NAMESPACE_BEGIN
 
@@ -135,7 +138,8 @@ static void shaderdata_to_shaderglobals(const KernelGlobalsCPU *kg,
 
 /* Surface */
 
-static void flatten_surface_closure_tree(ShaderData *sd,
+static void flatten_surface_closure_tree(const KernelGlobalsCPU *kg,
+                                         ShaderData *sd,
                                          uint32_t path_flag,
                                          const OSL::ClosureColor *closure,
                                          float3 weight = make_float3(1.0f, 1.0f, 1.0f))
@@ -146,27 +150,30 @@ static void flatten_surface_closure_tree(ShaderData *sd,
   switch (closure->id) {
     case OSL::ClosureColor::MUL: {
       OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
-      flatten_surface_closure_tree(sd, path_flag, mul->closure, TO_FLOAT3(mul->weight) * weight);
+      flatten_surface_closure_tree(kg, sd, path_flag, mul->closure, TO_FLOAT3(mul->weight) * weight);
       break;
     }
     case OSL::ClosureColor::ADD: {
       OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
-      flatten_surface_closure_tree(sd, path_flag, add->closureA, weight);
-      flatten_surface_closure_tree(sd, path_flag, add->closureB, weight);
+      flatten_surface_closure_tree(kg, sd, path_flag, add->closureA, weight);
+      flatten_surface_closure_tree(kg, sd, path_flag, add->closureB, weight);
       break;
     }
-    default: {
-      OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
-      CClosurePrimitive *prim = (CClosurePrimitive *)comp->data();
-
-      if (prim) {
-#ifdef OSL_SUPPORTS_WEIGHTED_CLOSURE_COMPONENTS
-        weight = weight * TO_FLOAT3(comp->w);
-#endif
-        prim->setup(sd, path_flag, weight);
-      }
+#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) \
+  case OSL_CLOSURE_##Upper##_ID: { \
+    const OSL::ClosureComponent *comp = \
+        reinterpret_cast<const OSL::ClosureComponent *>(closure); \
+    weight *= TO_FLOAT3(comp->w); \
+    osl_closure_##lower##_setup(kg, \
+                                sd, \
+                                path_flag, \
+                                weight, \
+                                reinterpret_cast<const Upper##Closure *>(comp + 1)); \
+    break; \
+  }
+#include "closures_template.h"
+    default:
       break;
-    }
   }
 }
 
@@ -240,12 +247,13 @@ void OSLShader::eval_surface(const KernelGlobalsCPU *kg,
 
   /* flatten closure tree */
   if (globals->Ci)
-    flatten_surface_closure_tree(sd, path_flag, globals->Ci);
+    flatten_surface_closure_tree(kg, sd, path_flag, globals->Ci);
 }
 
 /* Background */
 
-static void flatten_background_closure_tree(ShaderData *sd,
+static void flatten_background_closure_tree(const KernelGlobalsCPU *kg,
+                                            ShaderData *sd,
                                             const OSL::ClosureColor *closure,
                                             float3 weight = make_float3(1.0f, 1.0f, 1.0f))
 {
@@ -256,28 +264,27 @@ static void flatten_background_closure_tree(ShaderData *sd,
   switch (closure->id) {
     case OSL::ClosureColor::MUL: {
       OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
-      flatten_background_closure_tree(sd, mul->closure, weight * TO_FLOAT3(mul->weight));
+      flatten_background_closure_tree(kg, sd, mul->closure, weight * TO_FLOAT3(mul->weight));
       break;
     }
     case OSL::ClosureColor::ADD: {
       OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
 
-      flatten_background_closure_tree(sd, add->closureA, weight);
-      flatten_background_closure_tree(sd, add->closureB, weight);
+      flatten_background_closure_tree(kg, sd, add->closureA, weight);
+      flatten_background_closure_tree(kg, sd, add->closureB, weight);
       break;
     }
-    default: {
-      OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
-      CClosurePrimitive *prim = (CClosurePrimitive *)comp->data();
-
-      if (prim) {
-#ifdef OSL_SUPPORTS_WEIGHTED_CLOSURE_COMPONENTS
-        weight = weight * TO_FLOAT3(comp->w);
-#endif
-        prim->setup(sd, 0, weight);
-      }
+#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) \
+  case OSL_CLOSURE_##Upper##_ID: { \
+    const OSL::ClosureComponent *comp = reinterpret_cast<const OSL::ClosureComponent *>(closure); \
+    weight *= TO_FLOAT3(comp->w); \
+    osl_closure_##lower##_setup( \
+        kg, sd, 0, weight, reinterpret_cast<const Upper##Closure *>(comp + 1)); \
+    break; \
+  }
+#include "closures_template.h"
+    default:
       break;
-    }
   }
 }
 
@@ -301,12 +308,13 @@ void OSLShader::eval_background(const KernelGlobalsCPU *kg,
 
   /* return background color immediately */
   if (globals->Ci)
-    flatten_background_closure_tree(sd, globals->Ci);
+    flatten_background_closure_tree(kg, sd, globals->Ci);
 }
 
 /* Volume */
 
-static void flatten_volume_closure_tree(ShaderData *sd,
+static void flatten_volume_closure_tree(const KernelGlobalsCPU *kg,
+                                        ShaderData *sd,
                                         const OSL::ClosureColor *closure,
                                         float3 weight = make_float3(1.0f, 1.0f, 1.0f))
 {
@@ -316,26 +324,26 @@ static void flatten_volume_closure_tree(ShaderData *sd,
   switch (closure->id) {
     case OSL::ClosureColor::MUL: {
       OSL::ClosureMul *mul = (OSL::ClosureMul *)closure;
-      flatten_volume_closure_tree(sd, mul->closure, TO_FLOAT3(mul->weight) * weight);
+      flatten_volume_closure_tree(kg, sd, mul->closure, TO_FLOAT3(mul->weight) * weight);
       break;
     }
     case OSL::ClosureColor::ADD: {
       OSL::ClosureAdd *add = (OSL::ClosureAdd *)closure;
-      flatten_volume_closure_tree(sd, add->closureA, weight);
-      flatten_volume_closure_tree(sd, add->closureB, weight);
+      flatten_volume_closure_tree(kg, sd, add->closureA, weight);
+      flatten_volume_closure_tree(kg, sd, add->closureB, weight);
       break;
     }
-    default: {
-      OSL::ClosureComponent *comp = (OSL::ClosureComponent *)closure;
-      CClosurePrimitive *prim = (CClosurePrimitive *)comp->data();
-
-      if (prim) {
-#ifdef OSL_SUPPORTS_WEIGHTED_CLOSURE_COMPONENTS
-        weight = weight * TO_FLOAT3(comp->w);
-#endif
-        prim->setup(sd, 0, weight);
-      }
-    }
+#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) \
+  case OSL_CLOSURE_##Upper##_ID: { \
+    const OSL::ClosureComponent *comp = reinterpret_cast<const OSL::ClosureComponent *>(closure); \
+    weight *= TO_FLOAT3(comp->w); \
+    osl_closure_##lower##_setup( \
+        kg, sd, 0, weight, reinterpret_cast<const Upper##Closure *>(comp + 1)); \
+    break; \
+  }
+#include "closures_template.h"
+    default:
+      break;
   }
 }
 
@@ -360,7 +368,7 @@ void OSLShader::eval_volume(const KernelGlobalsCPU *kg,
 
   /* flatten closure tree */
   if (globals->Ci)
-    flatten_volume_closure_tree(sd, globals->Ci);
+    flatten_volume_closure_tree(kg, sd, globals->Ci);
 }
 
 /* Displacement */
@@ -386,40 +394,4 @@ void OSLShader::eval_displacement(const KernelGlobalsCPU *kg, const void *state,
   sd->P = TO_FLOAT3(globals->P);
 }
 
-/* Attributes */
-
-int OSLShader::find_attribute(const KernelGlobalsCPU *kg,
-                              const ShaderData *sd,
-                              uint id,
-                              AttributeDescriptor *desc)
-{
-  /* for OSL, a hash map is used to lookup the attribute by name. */
-  int object = sd->object * ATTR_PRIM_TYPES;
-
-  OSLGlobals::AttributeMap &attr_map = kg->osl->attribute_map[object];
-  ustring stdname(std::string("geom:") +
-                  std::string(Attribute::standard_name((AttributeStandard)id)));
-  OSLGlobals::AttributeMap::const_iterator it = attr_map.find(stdname);
-
-  if (it != attr_map.end()) {
-    const OSLGlobals::Attribute &osl_attr = it->second;
-    *desc = osl_attr.desc;
-
-    if (sd->prim == PRIM_NONE && (AttributeElement)osl_attr.desc.element != ATTR_ELEMENT_MESH) {
-      desc->offset = ATTR_STD_NOT_FOUND;
-      return ATTR_STD_NOT_FOUND;
-    }
-
-    /* return result */
-    if (osl_attr.desc.element == ATTR_ELEMENT_NONE) {
-      desc->offset = ATTR_STD_NOT_FOUND;
-    }
-    return desc->offset;
-  }
-  else {
-    desc->offset = ATTR_STD_NOT_FOUND;
-    return (int)ATTR_STD_NOT_FOUND;
-  }
-}
-
 CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/shader.h b/intern/cycles/kernel/osl/shader.h
index f0ab49dd6a8..c89eecb7698 100644
--- a/intern/cycles/kernel/osl/shader.h
+++ b/intern/cycles/kernel/osl/shader.h
@@ -33,9 +33,6 @@ struct OSLShadingSystem;
 
 class OSLShader {
  public:
-  /* init */
-  static void register_closures(OSLShadingSystem *ss);
-
   /* per thread data */
   static void thread_init(KernelGlobalsCPU *kg, OSLGlobals *osl_globals);
   static void thread_free(KernelGlobalsCPU *kg);
@@ -54,12 +51,6 @@ class OSLShader {
                           ShaderData *sd,
                           uint32_t path_flag);
   static void eval_displacement(const KernelGlobalsCPU *kg, const void *state, ShaderData *sd);
-
-  /* attributes */
-  static int find_attribute(const KernelGlobalsCPU *kg,
-                            const ShaderData *sd,
-                            uint id,
-                            AttributeDescriptor *desc);
 };
 
 CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/osl/types.h b/intern/cycles/kernel/osl/types.h
new file mode 100644
index 00000000000..14feb16aad4
--- /dev/null
+++ b/intern/cycles/kernel/osl/types.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright 2011-2022 Blender Foundation */
+
+#pragma once
+
+CCL_NAMESPACE_BEGIN
+
+/* Closure */
+
+enum ClosureTypeOSL {
+  OSL_CLOSURE_MUL_ID = -1,
+  OSL_CLOSURE_ADD_ID = -2,
+
+  OSL_CLOSURE_NONE_ID = 0,
+
+#define OSL_CLOSURE_STRUCT_BEGIN(Upper, lower) OSL_CLOSURE_##Upper##_ID,
+#include "closures_template.h"
+};
+
+
+CCL_NAMESPACE_END
diff --git a/intern/cycles/kernel/types.h b/intern/cycles/kernel/types.h
index 873d594f1f8..bd3791594e0 100644
--- a/intern/cycles/kernel/types.h
+++ b/intern/cycles/kernel/types.h
@@ -655,12 +655,11 @@ typedef struct AttributeDescriptor {
 
 /* For looking up attributes on objects and geometry. */
 typedef struct AttributeMap {
-  uint id;       /* Global unique identifier. */
-  uint element;  /* AttributeElement. */
-  int offset;    /* Offset into __attributes global arrays. */
-  uint8_t type;  /* NodeAttributeType. */
-  uint8_t flags; /* AttributeFlag. */
-  uint8_t pad[2];
+  uint64_t id;      /* Global unique identifier. */
+  int offset;       /* Offset into __attributes global arrays. */
+  uint16_t element; /* AttributeElement. */
+  uint8_t type;     /* NodeAttributeType. */
+  uint8_t flags;    /* AttributeFlag. */
 } AttributeMap;
 
 /* Closure data */
diff --git a/intern/cycles/scene/geometry.cpp b/intern/cycles/scene/geometry.cpp
index ae8dcaa43b6..d1a3df851c1 100644
--- a/intern/cycles/scene/geometry.cpp
+++ b/intern/cycles/scene/geometry.cpp
@@ -302,111 +302,32 @@ GeometryManager::~GeometryManager()
 {
 }
 
-void GeometryManager::update_osl_attributes(Device *device,
-                                            Scene *scene,
-                                            vector<AttributeRequestSet> &geom_attributes)
+void GeometryManager::update_osl_globals(Device *device, Scene *scene)
 {
 #ifdef WITH_OSL
-  /* for OSL, a hash map is used to lookup the attribute by name. */
   OSLGlobals *og = (OSLGlobals *)device->get_cpu_osl_memory();
 
   og->object_name_map.clear();
-  og->attribute_map.clear();
   og->object_names.clear();
 
-  og->attribute_map.resize(scene->objects.size() * ATTR_PRIM_TYPES);
-
   for (size_t i = 0; i < scene->objects.size(); i++) {
     /* set object name to object index map */
     Object *object = scene->objects[i];
     og->object_name_map[object->name] = i;
     og->object_names.push_back(object->name);
-
-    /* set object attributes */
-    foreach (ParamValue &attr, object->attributes) {
-      OSLGlobals::Attribute osl_attr;
-
-      osl_attr.type = attr.type();
-      osl_attr.desc.element = ATTR_ELEMENT_OBJECT;
-      osl_attr.value = attr;
-      osl_attr.desc.offset = 0;
-      osl_attr.desc.flags = 0;
-
-      og->attribute_map[i * ATTR_PRIM_TYPES + ATTR_PRIM_GEOMETRY][attr.name()] = osl_attr;
-      og->attribute_map[i * ATTR_PRIM_TYPES + ATTR_PRIM_SUBD][attr.name()] = osl_attr;
-    }
-
-    /* find geometry attributes */
-    size_t j = object->geometry->index;
-    assert(j < scene->geometry.size() && scene->geometry[j] == object->geometry);
-
-    AttributeRequestSet &attributes = geom_attributes[j];
-
-    /* set mesh attributes */
-    foreach (AttributeRequest &req, attributes.requests) {
-      OSLGlobals::Attribute osl_attr;
-
-      if (req.desc.element != ATTR_ELEMENT_NONE) {
-        osl_attr.desc = req.desc;
-
-        if (req.type == TypeDesc::TypeFloat)
-          osl_attr.type = TypeDesc::TypeFloat;
-        else if (req.type == TypeDesc::TypeMatrix)
-          osl_attr.type = TypeDesc::TypeMatrix;
-        else if (req.type == TypeFloat2)
-          osl_attr.type = TypeFloat2;
-        else if (req.type == TypeRGBA)
-          osl_attr.type = TypeRGBA;
-        else
-          osl_attr.type = TypeDesc::TypeColor;
-
-        if (req.std != ATTR_STD_NONE) {
-          /* if standard attribute, add lookup by geom: name convention */
-          ustring stdname(string("geom:") + string(Attribute::standard_name(req.std)));
-          og->attribute_map[i * ATTR_PRIM_TYPES + ATTR_PRIM_GEOMETRY][stdname] = osl_attr;
-        }
-        else if (req.name != ustring()) {
-          /* add lookup by geometry attribute name */
-          og->attribute_map[i * ATTR_PRIM_TYPES + ATTR_PRIM_GEOMETRY][req.name] = osl_attr;
-        }
-      }
-
-      if (req.subd_desc.element != ATTR_ELEMENT_NONE) {
-        osl_attr.desc = req.subd_desc;
-
-        if (req.subd_type == TypeDesc::TypeFloat)
-          osl_attr.type = TypeDesc::TypeFloat;
-        else if (req.subd_type == TypeDesc::TypeMatrix)
-          osl_attr.type = TypeDesc::TypeMatrix;
-        else if (req.subd_type == TypeFloat2)
-          osl_attr.type = TypeFloat2;
-        else if (req.subd_type == TypeRGBA)
-          osl_attr.type = TypeRGBA;
-        else
-          osl_attr.type = TypeDesc::TypeColor;
-
-        if (req.std != ATTR_STD_NONE) {
-          /* if standard attribute, add lookup by geom: name convention */
-          ustring stdname(string("geom:") + string(Attribute::standard_name(req.std)));
-          og->attribute_map[i * ATTR_PRIM_TYPES + ATTR_PRIM_SUBD][stdname] = osl_attr;
-        }
-        else if (req.name != ustring()) {
-          /* add lookup by geometry attribute name */
-          og->attribute_map[i * ATTR_PRIM_TYPES + ATTR_PRIM_SUBD][req.name] = osl_attr;
-        }
-      }
-    }
   }
 #else
   (void)device;
   (void)scene;
-  (void)geom_attributes;
 #endif
 }
 
 /* Generate a normal attribute map entry from an attribute descriptor. */
-static void emit_attribute_map_entry(
-    AttributeMap *attr_map, int index, uint id, TypeDesc type, const AttributeDescriptor &desc)
+static void emit_attribute_map_entry(AttributeMap *attr_map,
+                                     size_t index,
+                                     uint64_t id,
+                                     TypeDesc type,
+                                     const AttributeDescriptor &desc)
 {
   attr_map[index].id = id;
   attr_map[index].element = desc.element;
@@ -431,7 +352,7 @@ static void emit_attribute_map_entry(
 /* Generate an attribute map end marker, optionally including a link to another map.
  * Links are used to connect object attribute maps to mesh attribute maps. */
 static void emit_attribute_map_terminator(AttributeMap *attr_map,
-                                          int index,
+                                          size_t index,
                                           bool chain,
                                           uint chain_link)
 {
@@ -446,15 +367,8 @@ static void emit_attribute_map_terminator(AttributeMap *attr_map,
 
 /* Generate all necessary attribute map entries from the attribute request. */
 static void emit_attribute_mapping(
-    AttributeMap *attr_map, int index, Scene *scene, AttributeRequest &req, Geometry *geom)
+    AttributeMap *attr_map, size_t index, uint64_t id, AttributeRequest &req, Geometry *geom)
 {
-  uint id;
-
-  if (req.std == ATTR_STD_NONE)
-    id = scene->shader_manager->get_attribute_id(req.name);
-  else
-    id = scene->shader_manager->get_attribute_id(req.std);
-
   emit_attribute_map_entry(attr_map, index, id, req.type, req.desc);
 
   if (geom->is_mesh()) {
@@ -475,12 +389,26 @@ void GeometryManager::update_svm_attributes(Device *,
    * attribute, based on a unique shader attribute id. */
 
   /* compute array stride */
-  int attr_map_size = 0;
+  size_t attr_map_size = 0;
 
   for (size_t i = 0; i < scene->geometry.size(); i++) {
     Geometry *geom = scene->geometry[i];
     geom->attr_map_offset = attr_map_size;
-    attr_map_size += (geom_attributes[i].size() + 1) * ATTR_PRIM_TYPES;
+
+#ifdef WITH_OSL
+    size_t attr_count = 0;
+    foreach (AttributeRequest &req, geom_attributes[i].requests) {
+      if (req.std != ATTR_STD_NONE &&
+          scene->shader_manager->get_attribute_id(req.std) != (uint64_t)req.std)
+        attr_count += 2;
+      else
+        attr_count += 1;
+    }
+#else
+    const size_t attr_count = geom_attributes[i].size();
+#endif
+
+    attr_map_size += (attr_count + 1) * ATTR_PRIM_TYPES;
   }
 
   for (size_t i = 0; i < scene->objects.size(); i++) {
@@ -512,11 +440,26 @@ void GeometryManager::update_svm_attributes(Device *,
     AttributeRequestSet &attributes = geom_attributes[i];
 
     /* set geometry attributes */
-    int index = geom->attr_map_offset;
+    size_t index = geom->attr_map_offset;
 
     foreach (AttributeRequest &req, attributes.requests) {
-      emit_attribute_mapping(attr_map, index, scene, req, geom);
+      uint64_t id;
+      if (req.std == ATTR_STD_NONE)
+        id = scene->shader_manager->get_attribute_id(req.name);
+      else
+        id = scene->shader_manager->get_attribute_id(req.std);
+
+      emit_attribute_mapping(attr_map, index, id, req, geom);
       index += ATTR_PRIM_TYPES;
+
+#ifdef WITH_OSL
+      /* Some standard attributes are explicitly referenced via their standard ID, so add those
+       * again in case they were added under a different attribute ID. */
+      if (req.std != ATTR_STD_NONE && id != (uint64_t)req.std) {
+        emit_attribute_mapping(attr_map, index, (uint64_t)req.std, req, geom);
+        index += ATTR_PRIM_TYPES;
+      }
+#endif
     }
 
     emit_attribute_map_terminator(attr_map, index, false, 0);
@@ -528,10 +471,16 @@ void GeometryManager::update_svm_attributes(Device *,
 
     /* set object attributes */
     if (attributes.size() > 0) {
-      int index = object->attr_map_offset;
+      size_t index = object->attr_map_offset;
 
       foreach (AttributeRequest &req, attributes.requests) {
-        emit_attribute_mapping(attr_map, index, scene, req, object->geometry);
+        uint64_t id;
+        if (req.std == ATTR_STD_NONE)
+          id = scene->shader_manager->get_attribute_id(req.name);
+        else
+          id = scene->shader_manager->get_attribute_id(req.std);
+
+        emit_attribute_mapping(attr_map, index, id, req, object->geometry);
         index += ATTR_PRIM_TYPES;
       }
 
@@ -982,7 +931,7 @@ void GeometryManager::device_update_attributes(Device *device,
 
   /* create attribute lookup maps */
   if (scene->shader_manager->use_osl())
-    update_osl_attributes(device, scene, geom_attributes);
+    update_osl_globals(device, scene);
 
   update_svm_attributes(device, dscene, scene, geom_attributes, object_attributes);
 
@@ -2188,7 +2137,6 @@ void GeometryManager::device_free(Device *device, DeviceScene *dscene, bool forc
 
   if (og) {
     og->object_name_map.clear();
-    og->attribute_map.clear();
     og->object_names.clear();
   }
 #else
diff --git a/intern/cycles/scene/geometry.h b/intern/cycles/scene/geometry.h
index 6210a64509a..8a1bdc33a6f 100644
--- a/intern/cycles/scene/geometry.h
+++ b/intern/cycles/scene/geometry.h
@@ -219,9 +219,7 @@ class GeometryManager {
   void create_volume_mesh(const Scene *scene, Volume *volume, Progress &progress);
 
   /* Attributes */
-  void update_osl_attributes(Device *device,
-                             Scene *scene,
-                             vector<AttributeRequestSet> &geom_attributes);
+  void update_osl_globals(Device *device, Scene *scene);
   void update_svm_attributes(Device *device,
                              DeviceScene *dscene,
                              Scene *scene,
diff --git a/intern/cycles/scene/osl.cpp b/intern/cycles/scene/osl.cpp
index f5ee0c0f1d3..f0246b5b40e 100644
--- a/intern/cycles/scene/osl.cpp
+++ b/intern/cycles/scene/osl.cpp
@@ -78,6 +78,18 @@ void OSLShaderManager::reset(Scene * /*scene*/)
   shading_system_init();
 }
 
+uint64_t OSLShaderManager::get_attribute_id(ustring name)
+{
+  return name.hash();
+}
+
+uint64_t OSLShaderManager::get_attribute_id(AttributeStandard std)
+{
+  /* if standard attribute, use geom: name convention */
+  ustring stdname(string("geom:") + string(Attribute::standard_name(std)));
+  return stdname.hash();
+}
+
 void OSLShaderManager::device_update_specific(Device *device,
                                               DeviceScene *dscene,
                                               Scene *scene,
@@ -286,7 +298,7 @@ void OSLShaderManager::shading_system_init()
     const int nraytypes = sizeof(raytypes) / sizeof(raytypes[0]);
     ss_shared->attribute("raytypes", TypeDesc(TypeDesc::STRING, nraytypes), raytypes);
 
-    OSLShader::register_closures((OSLShadingSystem *)ss_shared);
+    OSLRenderServices::register_closures(ss_shared);
 
     loaded_shaders.clear();
   }
diff --git a/intern/cycles/scene/osl.h b/intern/cycles/scene/osl.h
index bf27069b1b1..76c6bd96ce1 100644
--- a/intern/cycles/scene/osl.h
+++ b/intern/cycles/scene/osl.h
@@ -66,6 +66,9 @@ class OSLShaderManager : public ShaderManager {
     return true;
   }
 
+  uint64_t get_attribute_id(ustring name) override;
+  uint64_t get_attribute_id(AttributeStandard std) override;
+
   void device_update_specific(Device *device,
                               DeviceScene *dscene,
                               Scene *scene,
diff --git a/intern/cycles/scene/shader.cpp b/intern/cycles/scene/shader.cpp
index bd647ab55e7..96a8f40bbad 100644
--- a/intern/cycles/scene/shader.cpp
+++ b/intern/cycles/scene/shader.cpp
@@ -414,7 +414,7 @@ ShaderManager *ShaderManager::create(int shadingsystem)
   return manager;
 }
 
-uint ShaderManager::get_attribute_id(ustring name)
+uint64_t ShaderManager::get_attribute_id(ustring name)
 {
   thread_scoped_spin_lock lock(attribute_lock_);
 
@@ -424,14 +424,14 @@ uint ShaderManager::get_attribute_id(ustring name)
   if (it != unique_attribute_id.end())
     return it->second;
 
-  uint id = (uint)ATTR_STD_NUM + unique_attribute_id.size();
+  uint64_t id = ATTR_STD_NUM + unique_attribute_id.size();
   unique_attribute_id[name] = id;
   return id;
 }
 
-uint ShaderManager::get_attribute_id(AttributeStandard std)
+uint64_t ShaderManager::get_attribute_id(AttributeStandard std)
 {
-  return (uint)std;
+  return (uint64_t)std;
 }
 
 int ShaderManager::get_shader_id(Shader *shader, bool smooth)
diff --git a/intern/cycles/scene/shader.h b/intern/cycles/scene/shader.h
index 274bb9b4fa1..2670776aca4 100644
--- a/intern/cycles/scene/shader.h
+++ b/intern/cycles/scene/shader.h
@@ -192,8 +192,8 @@ class ShaderManager {
   void device_free_common(Device *device, DeviceScene *dscene, Scene *scene);
 
   /* get globally unique id for a type of attribute */
-  uint get_attribute_id(ustring name);
-  uint get_attribute_id(AttributeStandard std);
+  virtual uint64_t get_attribute_id(ustring name);
+  virtual uint64_t get_attribute_id(AttributeStandard std);
 
   /* get shader id for mesh faces */
   int get_shader_id(Shader *shader, bool smooth = false);
@@ -223,7 +223,7 @@ class ShaderManager {
 
   uint32_t update_flags;
 
-  typedef unordered_map<ustring, uint, ustringHash> AttributeIDMap;
+  typedef unordered_map<ustring, uint64_t, ustringHash> AttributeIDMap;
   AttributeIDMap unique_attribute_id;
 
   static thread_mutex lookup_table_mutex;
diff --git a/intern/mikktspace/mikk_util.hh b/intern/mikktspace/mikk_util.hh
index 224ed647b30..857ca95910b 100644
--- a/intern/mikktspace/mikk_util.hh
+++ b/intern/mikktspace/mikk_util.hh
@@ -108,7 +108,7 @@ void radixsort(std::vector<T> &data, std::vector<T> &data2, KeyGetter getKey)
   static_assert(datasize % 2 == 0);
   static_assert(std::is_integral<key_t>::value);
 
-  uint bins[datasize][257] = {0};
+  uint bins[datasize][257] = {{0}};
 
   /* Count number of elements per bin. */
   for (const T &item : data) {
diff --git a/release/scripts/startup/bl_ui/properties_data_mesh.py b/release/scripts/startup/bl_ui/properties_data_mesh.py
index 686d455b6b4..d878eea0cb9 100644
--- a/release/scripts/startup/bl_ui/properties_data_mesh.py
+++ b/release/scripts/startup/bl_ui/properties_data_mesh.py
@@ -493,11 +493,19 @@ class DATA_PT_customdata(MeshButtonsPanel, Panel):
         else:
             col.operator("mesh.customdata_custom_splitnormals_add", icon='ADD')
 
+        if me.has_bevel_weight_edge:
+            col.operator("mesh.customdata_bevel_weight_edge_clear", icon='X')
+        else:
+            col.operator("mesh.customdata_bevel_weight_edge_add", icon='ADD')
+
+        if me.has_bevel_weight_vertex:
+            col.operator("mesh.customdata_bevel_weight_vertex_clear", icon='X')
+        else:
+            col.operator("mesh.customdata_bevel_weight_vertex_add", icon='ADD')
+
         col = layout.column(heading="Store")
 
         col.enabled = obj is not None and obj.mode != 'EDIT'
-        col.prop(me, "use_customdata_vertex_bevel", text="Vertex Bevel Weight")
-        col.prop(me, "use_customdata_edge_bevel", text="Edge Bevel Weight")
         col.prop(me, "use_customdata_vertex_crease", text="Vertex Crease")
         col.prop(me, "use_customdata_edge_crease", text="Edge Crease")
 
diff --git a/release/scripts/startup/bl_ui/space_outliner.py b/release/scripts/startup/bl_ui/space_outliner.py
index ec0ad401f5a..5c488748db8 100644
--- a/release/scripts/startup/bl_ui/space_outliner.py
+++ b/release/scripts/startup/bl_ui/space_outliner.py
@@ -323,9 +323,21 @@ class OUTLINER_MT_object(Menu):
         OUTLINER_MT_context_menu.draw_common_operators(layout)
 
 
+def has_selected_ids_in_context(context):
+    if hasattr(context, "id"):
+        return True
+    if len(context.selected_ids) > 0:
+        return True
+
+    return False
+
 class OUTLINER_MT_asset(Menu):
     bl_label = "Assets"
 
+    @classmethod
+    def poll(cls, context):
+        return has_selected_ids_in_context(context)
+
     def draw(self, _context):
         layout = self.layout
 
@@ -337,6 +349,10 @@ class OUTLINER_MT_asset(Menu):
 class OUTLINER_MT_liboverride(Menu):
     bl_label = "Library Override"
 
+    @classmethod
+    def poll(cls, context):
+        return has_selected_ids_in_context(context)
+
     def draw(self, _context):
         layout = self.layout
 
diff --git a/source/blender/blenkernel/BKE_appdir.h b/source/blender/blenkernel/BKE_appdir.h
index 16488bdbf09..dcacc2ca7b3 100644
--- a/source/blender/blenkernel/BKE_appdir.h
+++ b/source/blender/blenkernel/BKE_appdir.h
@@ -105,11 +105,8 @@ void BKE_appdir_app_templates(struct ListBase *templates);
 
 /**
  * Initialize path to program executable.
- *
- * \param strict: When true, use `argv0` unmodified (besides making absolute & normalizing).
- * Otherwise other methods may be used to find the program path, including searching `$PATH`.
  */
-void BKE_appdir_program_path_init(const char *argv0, bool strict);
+void BKE_appdir_program_path_init(const char *argv0);
 
 /**
  * Path to executable
diff --git a/source/blender/blenkernel/BKE_customdata.h b/source/blender/blenkernel/BKE_customdata.h
index 44a4f4b5395..09d37682b3c 100644
--- a/source/blender/blenkernel/BKE_customdata.h
+++ b/source/blender/blenkernel/BKE_customdata.h
@@ -640,7 +640,6 @@ enum {
   CD_FAKE_CREASE = CD_FAKE | CD_CREASE, /* *sigh*. */
 
   /* Multiple types of mesh elements... */
-  CD_FAKE_BWEIGHT = CD_FAKE | CD_BWEIGHT, /* *sigh*. */
   CD_FAKE_UV = CD_FAKE |
                CD_MLOOPUV, /* UV flag, because we handle both loop's UVs and poly's textures. */
 
diff --git a/source/blender/blenkernel/BKE_deform.h b/source/blender/blenkernel/BKE_deform.h
index f58a5502788..677a1053826 100644
--- a/source/blender/blenkernel/BKE_deform.h
+++ b/source/blender/blenkernel/BKE_deform.h
@@ -52,14 +52,22 @@ struct bDeformGroup *BKE_object_defgroup_find_name(const struct Object *ob, cons
 /**
  * \note caller must free.
  */
-int *BKE_object_defgroup_flip_map(const struct Object *ob, int *flip_map_len, bool use_default);
+int *BKE_object_defgroup_flip_map(const struct Object *ob, bool use_default, int *r_flip_map_num);
+
+/**
+ * Returns flip map for only unlocked defgroups.
+ * \note caller must free.
+ */
+int *BKE_object_defgroup_flip_map_unlocked(const struct Object *ob,
+                                           bool use_default,
+                                           int *r_flip_map_num);
 /**
  * \note caller must free.
  */
 int *BKE_object_defgroup_flip_map_single(const struct Object *ob,
-                                         int *flip_map_len,
                                          bool use_default,
-                                         int defgroup);
+                                         int defgroup,
+                                         int *r_flip_map_num);
 int BKE_object_defgroup_flip_index(const struct Object *ob, int index, bool use_default);
 int BKE_object_defgroup_name_index(const struct Object *ob, const char *name);
 void BKE_object_defgroup_unique_name(struct bDeformGroup *dg, struct Object *ob);
@@ -112,7 +120,7 @@ float BKE_defvert_array_find_weight_safe(const struct MDeformVert *dvert, int in
  * \return The total weight in all groups marked in the selection mask.
  */
 float BKE_defvert_total_selected_weight(const struct MDeformVert *dv,
-                                        int defbase_tot,
+                                        int defbase_num,
                                         const bool *defbase_sel);
 
 /**
@@ -124,9 +132,9 @@ float BKE_defvert_total_selected_weight(const struct MDeformVert *dv,
  * commutative with the collective weight function.
  */
 float BKE_defvert_multipaint_collective_weight(const struct MDeformVert *dv,
-                                               int defbase_tot,
+                                               int defbase_num,
                                                const bool *defbase_sel,
-                                               int defbase_tot_sel,
+                                               int defbase_sel_num,
                                                bool is_normalized);
 
 /* This much unlocked weight is considered equivalent to none. */
@@ -147,7 +155,7 @@ float BKE_defvert_calc_lock_relative_weight(float weight,
  */
 float BKE_defvert_lock_relative_weight(float weight,
                                        const struct MDeformVert *dv,
-                                       int defbase_tot,
+                                       int defbase_num,
                                        const bool *defbase_locked,
                                        const bool *defbase_unlocked);
 
@@ -160,7 +168,7 @@ void BKE_defvert_copy(struct MDeformVert *dvert_dst, const struct MDeformVert *d
 void BKE_defvert_copy_subset(struct MDeformVert *dvert_dst,
                              const struct MDeformVert *dvert_src,
                              const bool *vgroup_subset,
-                             int vgroup_tot);
+                             int vgroup_num);
 /**
  * Overwrite weights filtered by vgroup_subset and with mirroring specified by the flip map
  * - do nothing if neither are set.
@@ -169,9 +177,9 @@ void BKE_defvert_copy_subset(struct MDeformVert *dvert_dst,
 void BKE_defvert_mirror_subset(struct MDeformVert *dvert_dst,
                                const struct MDeformVert *dvert_src,
                                const bool *vgroup_subset,
-                               int vgroup_tot,
+                               int vgroup_num,
                                const int *flip_map,
-                               int flip_map_len);
+                               int flip_map_num);
 /**
  * Copy an index from one #MDeformVert to another.
  * - do nothing if neither are set.
@@ -194,43 +202,43 @@ void BKE_defvert_sync(struct MDeformVert *dvert_dst,
 void BKE_defvert_sync_mapped(struct MDeformVert *dvert_dst,
                              const struct MDeformVert *dvert_src,
                              const int *flip_map,
-                             int flip_map_len,
+                             int flip_map_num,
                              bool use_ensure);
 /**
  * be sure all flip_map values are valid
  */
 void BKE_defvert_remap(struct MDeformVert *dvert, const int *map, int map_len);
-void BKE_defvert_flip(struct MDeformVert *dvert, const int *flip_map, int flip_map_len);
-void BKE_defvert_flip_merged(struct MDeformVert *dvert, const int *flip_map, int flip_map_len);
+void BKE_defvert_flip(struct MDeformVert *dvert, const int *flip_map, int flip_map_num);
+void BKE_defvert_flip_merged(struct MDeformVert *dvert, const int *flip_map, int flip_map_num);
 void BKE_defvert_normalize(struct MDeformVert *dvert);
 /**
  * Same as #BKE_defvert_normalize but takes a bool array.
  */
 void BKE_defvert_normalize_subset(struct MDeformVert *dvert,
                                   const bool *vgroup_subset,
-                                  int vgroup_tot);
+                                  int vgroup_num);
 /**
  * Same as BKE_defvert_normalize() if the locked vgroup is not a member of the subset
  */
 void BKE_defvert_normalize_lock_single(struct MDeformVert *dvert,
                                        const bool *vgroup_subset,
-                                       int vgroup_tot,
+                                       int vgroup_num,
                                        uint def_nr_lock);
 /**
  * Same as BKE_defvert_normalize() if no locked vgroup is a member of the subset
  */
 void BKE_defvert_normalize_lock_map(struct MDeformVert *dvert,
                                     const bool *vgroup_subset,
-                                    int vgroup_tot,
+                                    int vgroup_num,
                                     const bool *lock_flags,
-                                    int defbase_tot);
+                                    int defbase_num);
 
 /* Utilities to 'extract' a given vgroup into a simple float array,
  * for verts, but also edges/polys/loops. */
 
 void BKE_defvert_extract_vgroup_to_vertweights(const struct MDeformVert *dvert,
                                                int defgroup,
-                                               int num_verts,
+                                               int verts_num,
                                                bool invert_vgroup,
                                                float *r_weights);
 /**
@@ -239,25 +247,25 @@ void BKE_defvert_extract_vgroup_to_vertweights(const struct MDeformVert *dvert,
  */
 void BKE_defvert_extract_vgroup_to_edgeweights(const struct MDeformVert *dvert,
                                                int defgroup,
-                                               int num_verts,
+                                               int verts_num,
                                                const struct MEdge *edges,
-                                               int num_edges,
+                                               int edges_num,
                                                bool invert_vgroup,
                                                float *r_weights);
 void BKE_defvert_extract_vgroup_to_loopweights(const struct MDeformVert *dvert,
                                                int defgroup,
-                                               int num_verts,
+                                               int verts_num,
                                                const struct MLoop *loops,
-                                               int num_loops,
+                                               int loops_num,
                                                bool invert_vgroup,
                                                float *r_weights);
 void BKE_defvert_extract_vgroup_to_polyweights(const struct MDeformVert *dvert,
                                                int defgroup,
-                                               int num_verts,
+                                               int verts_num,
                                                const struct MLoop *loops,
-                                               int num_loops,
+                                               int loops_num,
                                                const struct MPoly *polys,
-                                               int num_polys,
+                                               int polys_num,
                                                bool invert_vgroup,
                                                float *r_weights);
 
diff --git a/source/blender/blenkernel/BKE_key.h b/source/blender/blenkernel/BKE_key.h
index 9f506ded8e9..45a72e8d7a3 100644
--- a/source/blender/blenkernel/BKE_key.h
+++ b/source/blender/blenkernel/BKE_key.h
@@ -95,6 +95,9 @@ struct KeyBlock *BKE_keyblock_from_key(struct Key *key, int index);
  * Get the appropriate #KeyBlock given a name to search for.
  */
 struct KeyBlock *BKE_keyblock_find_name(struct Key *key, const char name[]);
+
+struct KeyBlock *BKE_keyblock_find_uid(struct Key *key, int uid);
+
 /**
  * \brief copy shape-key attributes, but not key data or name/UID.
  */
diff --git a/source/blender/blenkernel/BKE_lib_id.h b/source/blender/blenkernel/BKE_lib_id.h
index 4e4b393fcd6..e5b013ce201 100644
--- a/source/blender/blenkernel/BKE_lib_id.h
+++ b/source/blender/blenkernel/BKE_lib_id.h
@@ -623,7 +623,7 @@ bool BKE_id_can_be_asset(const struct ID *id);
 /**
  * Return the owner ID of the given `id`, if any.
  *
- * \note: This will only return non-NULL for embedded IDs (master collections etc.), and shapekeys.
+ * \note This will only return non-NULL for embedded IDs (master collections etc.), and shape-keys.
  */
 struct ID *BKE_id_owner_get(struct ID *id);
 
diff --git a/source/blender/blenkernel/BKE_mesh.h b/source/blender/blenkernel/BKE_mesh.h
index 1048ca39958..ef57c9a2e0e 100644
--- a/source/blender/blenkernel/BKE_mesh.h
+++ b/source/blender/blenkernel/BKE_mesh.h
@@ -292,13 +292,10 @@ struct Mesh *BKE_mesh_create_derived_for_modifier(struct Depsgraph *depsgraph,
                                                   bool build_shapekey_layers);
 
 /**
- * Copies a nomain-Mesh into an existing Mesh.
+ * Move data from a mesh outside of the main data-base into a mesh in the data-base.
+ * Takes ownership of the source mesh.
  */
-void BKE_mesh_nomain_to_mesh(struct Mesh *mesh_src,
-                             struct Mesh *mesh_dst,
-                             struct Object *ob,
-                             const struct CustomData_MeshMasks *mask,
-                             bool take_ownership);
+void BKE_mesh_nomain_to_mesh(struct Mesh *mesh_src, struct Mesh *mesh_dst, struct Object *ob);
 void BKE_mesh_nomain_to_meshkey(struct Mesh *mesh_src, struct Mesh *mesh_dst, struct KeyBlock *kb);
 
 /* vertex level transformations & checks (no derived mesh) */
diff --git a/source/blender/blenkernel/BKE_mesh_legacy_convert.h b/source/blender/blenkernel/BKE_mesh_legacy_convert.h
index 11ee86c62a7..e67aec0b9ce 100644
--- a/source/blender/blenkernel/BKE_mesh_legacy_convert.h
+++ b/source/blender/blenkernel/BKE_mesh_legacy_convert.h
@@ -18,6 +18,15 @@ struct Mesh;
 struct MFace;
 
 /**
+ * Copy bevel weights from separate layers into vertices and edges.
+ */
+void BKE_mesh_legacy_bevel_weight_from_layers(struct Mesh *mesh);
+/**
+ * Copy bevel weights from vertices and edges to separate layers.
+ */
+void BKE_mesh_legacy_bevel_weight_to_layers(struct Mesh *mesh);
+
+/**
  * Convert the hidden element attributes to the old flag format for writing.
  */
 void BKE_mesh_legacy_convert_hide_layers_to_flags(struct Mesh *mesh);
diff --git a/source/blender/blenkernel/BKE_node.h b/source/blender/blenkernel/BKE_node.h
index 46303a4e19c..55bf24f943e 100644
--- a/source/blender/blenkernel/BKE_node.h
+++ b/source/blender/blenkernel/BKE_node.h
@@ -1337,15 +1337,6 @@ void BKE_nodetree_remove_layer_n(struct bNodeTree *ntree, struct Scene *scene, i
 #define CMP_CHAN_RGB 1
 #define CMP_CHAN_A 2
 
-/* scale node type, in custom1 */
-#define CMP_SCALE_RELATIVE 0
-#define CMP_SCALE_ABSOLUTE 1
-#define CMP_SCALE_SCENEPERCENT 2
-#define CMP_SCALE_RENDERPERCENT 3
-/* custom2 */
-#define CMP_SCALE_RENDERSIZE_FRAME_ASPECT (1 << 0)
-#define CMP_SCALE_RENDERSIZE_FRAME_CROP (1 << 1)
-
 /* track position node, in custom1 */
 #define CMP_TRACKPOS_ABSOLUTE 0
 #define CMP_TRACKPOS_RELATIVE_START 1
diff --git a/source/blender/blenkernel/BKE_subdiv_mesh.h b/source/blender/blenkernel/BKE_subdiv_mesh.h
index b24db517143..49c45efafe0 100644
--- a/source/blender/blenkernel/BKE_subdiv_mesh.h
+++ b/source/blender/blenkernel/BKE_subdiv_mesh.h
@@ -14,7 +14,9 @@ extern "C" {
 #endif
 
 struct Mesh;
+struct MeshElemMap;
 struct MEdge;
+struct MVert;
 struct Subdiv;
 
 typedef struct SubdivToMeshSettings {
@@ -37,8 +39,10 @@ struct Mesh *BKE_subdiv_to_mesh(struct Subdiv *subdiv,
 /* Interpolate a position along the `coarse_edge` at the relative `u` coordinate. If `is_simple` is
  * false, this will perform a B-Spline interpolation using the edge neighbors, otherwise a linear
  * interpolation will be done base on the edge vertices. */
-void BKE_subdiv_mesh_interpolate_position_on_edge(const struct Mesh *coarse_mesh,
-                                                  const struct MEdge *coarse_edge,
+void BKE_subdiv_mesh_interpolate_position_on_edge(const struct MVert *coarse_verts,
+                                                  const struct MEdge *coarse_edges,
+                                                  const struct MeshElemMap *vert_to_edge_map,
+                                                  int coarse_edge_index,
                                                   bool is_simple,
                                                   float u,
                                                   float pos_r[3]);
diff --git a/source/blender/blenkernel/CMakeLists.txt b/source/blender/blenkernel/CMakeLists.txt
index 9521da8417e..b982c69a378 100644
--- a/source/blender/blenkernel/CMakeLists.txt
+++ b/source/blender/blenkernel/CMakeLists.txt
@@ -659,6 +659,10 @@ if(WITH_PYTHON)
   )
   add_definitions(-DWITH_PYTHON)
 
+  if(WITH_PYTHON_MODULE)
+    add_definitions(-DWITH_PYTHON_MODULE)
+  endif()
+
   if(WITH_PYTHON_SAFETY)
     add_definitions(-DWITH_PYTHON_SAFETY)
   endif()
diff --git a/source/blender/blenkernel/intern/appdir.c b/source/blender/blenkernel/intern/appdir.c
index c19afdb4fb8..f4dec0aecd7 100644
--- a/source/blender/blenkernel/intern/appdir.c
+++ b/source/blender/blenkernel/intern/appdir.c
@@ -374,7 +374,7 @@ static bool get_path_local_ex(char *targetpath,
   /* Try `{g_app.program_dirname}/2.xx/{folder_name}` the default directory
    * for a portable distribution. See `WITH_INSTALL_PORTABLE` build-option. */
   const char *path_base = g_app.program_dirname;
-#ifdef __APPLE__
+#if defined(__APPLE__) && !defined(WITH_PYTHON_MODULE)
   /* Due new code-sign situation in OSX > 10.9.5
    * we must move the blender_version dir with contents to Resources. */
   char osx_resourses[FILE_MAX];
@@ -782,6 +782,7 @@ const char *BKE_appdir_folder_id_version(const int folder_id,
  * Access locations of Blender & Python.
  * \{ */
 
+#ifndef WITH_PYTHON_MODULE
 /**
  * Checks if name is a fully qualified filename to an executable.
  * If not it searches `$PATH` for the file. On Windows it also
@@ -794,11 +795,11 @@ const char *BKE_appdir_folder_id_version(const int folder_id,
  * (must be #FILE_MAX minimum)
  * \param name: The name of the executable (usually `argv[0]`) to be checked
  */
-static void where_am_i(char *fullname, const size_t maxlen, const char *name, const bool strict)
+static void where_am_i(char *fullname, const size_t maxlen, const char *name)
 {
-#ifdef WITH_BINRELOC
+#  ifdef WITH_BINRELOC
   /* Linux uses `binreloc` since `argv[0]` is not reliable, call `br_init(NULL)` first. */
-  if (!strict) {
+  {
     const char *path = NULL;
     path = br_find_exe(NULL);
     if (path) {
@@ -807,10 +808,10 @@ static void where_am_i(char *fullname, const size_t maxlen, const char *name, co
       return;
     }
   }
-#endif
+#  endif
 
-#ifdef _WIN32
-  if (!strict) {
+#  ifdef _WIN32
+  {
     wchar_t *fullname_16 = MEM_mallocN(maxlen * sizeof(wchar_t), "ProgramPath");
     if (GetModuleFileNameW(0, fullname_16, maxlen)) {
       conv_utf_16_to_8(fullname_16, fullname, maxlen);
@@ -825,7 +826,7 @@ static void where_am_i(char *fullname, const size_t maxlen, const char *name, co
 
     MEM_freeN(fullname_16);
   }
-#endif
+#  endif
 
   /* Unix and non Linux. */
   if (name && name[0]) {
@@ -833,46 +834,60 @@ static void where_am_i(char *fullname, const size_t maxlen, const char *name, co
     BLI_strncpy(fullname, name, maxlen);
     if (name[0] == '.') {
       BLI_path_abs_from_cwd(fullname, maxlen);
-#ifdef _WIN32
-      if (!strict) {
-        BLI_path_program_extensions_add_win32(fullname, maxlen);
-      }
-#endif
+#  ifdef _WIN32
+      BLI_path_program_extensions_add_win32(fullname, maxlen);
+#  endif
     }
     else if (BLI_path_slash_rfind(name)) {
       /* Full path. */
       BLI_strncpy(fullname, name, maxlen);
-#ifdef _WIN32
-      if (!strict) {
-        BLI_path_program_extensions_add_win32(fullname, maxlen);
-      }
-#endif
+#  ifdef _WIN32
+      BLI_path_program_extensions_add_win32(fullname, maxlen);
+#  endif
     }
     else {
-      if (!strict) {
-        BLI_path_program_search(fullname, maxlen, name);
-      }
+      BLI_path_program_search(fullname, maxlen, name);
     }
     /* Remove "/./" and "/../" so string comparisons can be used on the path. */
     BLI_path_normalize(NULL, fullname);
 
-#if defined(DEBUG)
+#  if defined(DEBUG)
     if (!STREQ(name, fullname)) {
       CLOG_INFO(&LOG, 2, "guessing '%s' == '%s'", name, fullname);
     }
-#endif
+#  endif
   }
 }
+#endif /* WITH_PYTHON_MODULE */
 
-void BKE_appdir_program_path_init(const char *argv0, const bool strict)
+void BKE_appdir_program_path_init(const char *argv0)
 {
-  where_am_i(g_app.program_filepath, sizeof(g_app.program_filepath), argv0, strict);
+#ifdef WITH_PYTHON_MODULE
+  /* NOTE(@campbellbarton): Always use `argv[0]` as is, when building as a Python module.
+   * Otherwise other methods of detecting the binary that override this argument
+   * which must point to the Python module for data-files to be detected. */
+  STRNCPY(g_app.program_filepath, argv0);
+  BLI_path_abs_from_cwd(g_app.program_filepath, sizeof(g_app.program_filepath));
+  BLI_path_normalize(NULL, g_app.program_filepath);
+
+  if (g_app.program_dirname[0] == '\0') {
+    /* First time initializing, the file binary path isn't valid from a Python module.
+     * Calling again must set the `filepath` and leave the directory as-is. */
+    BLI_split_dir_part(
+        g_app.program_filepath, g_app.program_dirname, sizeof(g_app.program_dirname));
+    g_app.program_filepath[0] = '\0';
+  }
+#else
+  where_am_i(g_app.program_filepath, sizeof(g_app.program_filepath), argv0);
   BLI_split_dir_part(g_app.program_filepath, g_app.program_dirname, sizeof(g_app.program_dirname));
+#endif
 }
 
 const char *BKE_appdir_program_path(void)
 {
+#ifndef WITH_PYTHON_MODULE /* Default's to empty when building as as Python module. */
   BLI_assert(g_app.program_filepath[0]);
+#endif
   return g_app.program_filepath;
 }
 
diff --git a/source/blender/blenkernel/intern/customdata.cc b/source/blender/blenkernel/intern/customdata.cc
index cfb8416b0b4..24373053896 100644
--- a/source/blender/blenkernel/intern/customdata.cc
+++ b/source/blender/blenkernel/intern/customdata.cc
@@ -1867,7 +1867,7 @@ static const LayerTypeInfo LAYERTYPEINFO[CD_NUMTYPES] = {
     /* 28: CD_SHAPEKEY */
     {sizeof(float[3]), "", 0, N_("ShapeKey"), nullptr, nullptr, layerInterp_shapekey},
     /* 29: CD_BWEIGHT */
-    {sizeof(float), "", 0, N_("BevelWeight"), nullptr, nullptr, layerInterp_bweight},
+    {sizeof(MFloatProperty), "MFloatProperty", 1, nullptr, nullptr, nullptr, layerInterp_bweight},
     /* 30: CD_CREASE */
     /* NOTE: we do not interpolate crease data as it should be either inherited for subdivided
      * edges, or for vertex creases, only present on the original vertex. */
@@ -2108,23 +2108,23 @@ static const char *LAYERTYPENAMES[CD_NUMTYPES] = {
 };
 
 const CustomData_MeshMasks CD_MASK_BAREMESH = {
-    /* vmask */ CD_MASK_MVERT | CD_MASK_BWEIGHT,
-    /* emask */ CD_MASK_MEDGE | CD_MASK_BWEIGHT,
+    /* vmask */ CD_MASK_MVERT,
+    /* emask */ CD_MASK_MEDGE,
     /* fmask */ 0,
     /* pmask */ CD_MASK_MPOLY | CD_MASK_FACEMAP,
     /* lmask */ CD_MASK_MLOOP,
 };
 const CustomData_MeshMasks CD_MASK_BAREMESH_ORIGINDEX = {
-    /* vmask */ CD_MASK_MVERT | CD_MASK_BWEIGHT | CD_MASK_ORIGINDEX,
-    /* emask */ CD_MASK_MEDGE | CD_MASK_BWEIGHT | CD_MASK_ORIGINDEX,
+    /* vmask */ CD_MASK_MVERT | CD_MASK_ORIGINDEX,
+    /* emask */ CD_MASK_MEDGE | CD_MASK_ORIGINDEX,
     /* fmask */ 0,
     /* pmask */ CD_MASK_MPOLY | CD_MASK_FACEMAP | CD_MASK_ORIGINDEX,
     /* lmask */ CD_MASK_MLOOP,
 };
 const CustomData_MeshMasks CD_MASK_MESH = {
     /* vmask */ (CD_MASK_MVERT | CD_MASK_MDEFORMVERT | CD_MASK_MVERT_SKIN | CD_MASK_PAINT_MASK |
-                 CD_MASK_PROP_ALL | CD_MASK_CREASE),
-    /* emask */ (CD_MASK_MEDGE | CD_MASK_FREESTYLE_EDGE | CD_MASK_PROP_ALL),
+                 CD_MASK_PROP_ALL | CD_MASK_CREASE | CD_MASK_BWEIGHT),
+    /* emask */ (CD_MASK_MEDGE | CD_MASK_FREESTYLE_EDGE | CD_MASK_PROP_ALL | CD_MASK_BWEIGHT),
     /* fmask */ 0,
     /* pmask */
     (CD_MASK_MPOLY | CD_MASK_FACEMAP | CD_MASK_FREESTYLE_FACE | CD_MASK_PROP_ALL |
@@ -2136,8 +2136,8 @@ const CustomData_MeshMasks CD_MASK_MESH = {
 const CustomData_MeshMasks CD_MASK_DERIVEDMESH = {
     /* vmask */ (CD_MASK_ORIGINDEX | CD_MASK_MDEFORMVERT | CD_MASK_SHAPEKEY | CD_MASK_MVERT_SKIN |
                  CD_MASK_PAINT_MASK | CD_MASK_ORCO | CD_MASK_CLOTH_ORCO | CD_MASK_PROP_ALL |
-                 CD_MASK_CREASE),
-    /* emask */ (CD_MASK_ORIGINDEX | CD_MASK_FREESTYLE_EDGE | CD_MASK_PROP_ALL),
+                 CD_MASK_CREASE | CD_MASK_BWEIGHT),
+    /* emask */ (CD_MASK_ORIGINDEX | CD_MASK_FREESTYLE_EDGE | CD_MASK_BWEIGHT | CD_MASK_PROP_ALL),
     /* fmask */ (CD_MASK_ORIGINDEX | CD_MASK_ORIGSPACE | CD_MASK_PREVIEW_MCOL | CD_MASK_TANGENT),
     /* pmask */
     (CD_MASK_ORIGINDEX | CD_MASK_FREESTYLE_FACE | CD_MASK_FACEMAP | CD_MASK_PROP_ALL |
@@ -2353,8 +2353,16 @@ bool CustomData_merge(const CustomData *source,
       changed = true;
 
       if (layer->anonymous_id != nullptr) {
-        BKE_anonymous_attribute_id_increment_weak(layer->anonymous_id);
         newlayer->anonymous_id = layer->anonymous_id;
+        if (alloctype == CD_ASSIGN) {
+          layer->anonymous_id = nullptr;
+        }
+        else {
+          BKE_anonymous_attribute_id_increment_weak(layer->anonymous_id);
+        }
+      }
+      if (alloctype == CD_ASSIGN) {
+        layer->data = nullptr;
       }
     }
   }
@@ -5167,7 +5175,7 @@ void CustomData_data_transfer(const MeshPairRemap *me_remap,
   else {
     const LayerTypeInfo *type_info = layerType_getInfo(data_type);
 
-    /* NOTE: we can use 'fake' CDLayers, like e.g. for crease, bweight, etc. :/. */
+    /* NOTE: we can use 'fake' CDLayers for crease :/. */
     data_size = (size_t)type_info->size;
     data_step = laymap->elem_size ? laymap->elem_size : data_size;
     data_offset = laymap->data_offset;
diff --git a/source/blender/blenkernel/intern/data_transfer.c b/source/blender/blenkernel/intern/data_transfer.c
index 6fbdade08f8..6c7715c625e 100644
--- a/source/blender/blenkernel/intern/data_transfer.c
+++ b/source/blender/blenkernel/intern/data_transfer.c
@@ -192,7 +192,7 @@ int BKE_object_data_transfer_dttype_to_cdtype(const int dtdata_type)
     case DT_TYPE_SKIN:
       return CD_MVERT_SKIN;
     case DT_TYPE_BWEIGHT_VERT:
-      return CD_FAKE_BWEIGHT;
+      return CD_BWEIGHT;
 
     case DT_TYPE_SHARP_EDGE:
       return CD_FAKE_SHARP;
@@ -201,7 +201,7 @@ int BKE_object_data_transfer_dttype_to_cdtype(const int dtdata_type)
     case DT_TYPE_CREASE:
       return CD_FAKE_CREASE;
     case DT_TYPE_BWEIGHT_EDGE:
-      return CD_FAKE_BWEIGHT;
+      return CD_BWEIGHT;
     case DT_TYPE_FREESTYLE_EDGE:
       return CD_FREESTYLE_EDGE;
 
@@ -928,38 +928,6 @@ static bool data_transfer_layersmapping_generate(ListBase *r_map,
       }
       return true;
     }
-    if (cddata_type == CD_FAKE_BWEIGHT) {
-      const size_t elem_size = sizeof(*((MVert *)NULL));
-      const size_t data_size = sizeof(((MVert *)NULL)->bweight);
-      const size_t data_offset = offsetof(MVert, bweight);
-      const uint64_t data_flag = 0;
-
-      if (!(me_src->cd_flag & ME_CDFLAG_VERT_BWEIGHT)) {
-        if (use_delete) {
-          me_dst->cd_flag &= ~ME_CDFLAG_VERT_BWEIGHT;
-        }
-        return true;
-      }
-      me_dst->cd_flag |= ME_CDFLAG_VERT_BWEIGHT;
-      if (r_map) {
-        data_transfer_layersmapping_add_item(r_map,
-                                             cddata_type,
-                                             mix_mode,
-                                             mix_factor,
-                                             mix_weights,
-                                             BKE_mesh_verts(me_src),
-                                             BKE_mesh_verts_for_write(me_dst),
-                                             me_src->totvert,
-                                             me_dst->totvert,
-                                             elem_size,
-                                             data_size,
-                                             data_offset,
-                                             data_flag,
-                                             data_transfer_interp_char,
-                                             interp_data);
-      }
-      return true;
-    }
     if (cddata_type == CD_FAKE_MDEFORMVERT) {
       bool ret;
 
@@ -1045,38 +1013,7 @@ static bool data_transfer_layersmapping_generate(ListBase *r_map,
       }
       return true;
     }
-    if (cddata_type == CD_FAKE_BWEIGHT) {
-      const size_t elem_size = sizeof(*((MEdge *)NULL));
-      const size_t data_size = sizeof(((MEdge *)NULL)->bweight);
-      const size_t data_offset = offsetof(MEdge, bweight);
-      const uint64_t data_flag = 0;
 
-      if (!(me_src->cd_flag & ME_CDFLAG_EDGE_BWEIGHT)) {
-        if (use_delete) {
-          me_dst->cd_flag &= ~ME_CDFLAG_EDGE_BWEIGHT;
-        }
-        return true;
-      }
-      me_dst->cd_flag |= ME_CDFLAG_EDGE_BWEIGHT;
-      if (r_map) {
-        data_transfer_layersmapping_add_item(r_map,
-                                             cddata_type,
-                                             mix_mode,
-                                             mix_factor,
-                                             mix_weights,
-                                             BKE_mesh_edges(me_src),
-                                             BKE_mesh_edges_for_write(me_dst),
-                                             me_src->totedge,
-                                             me_dst->totedge,
-                                             elem_size,
-                                             data_size,
-                                             data_offset,
-                                             data_flag,
-                                             data_transfer_interp_char,
-                                             interp_data);
-      }
-      return true;
-    }
     if (r_map && ELEM(cddata_type, CD_FAKE_SHARP, CD_FAKE_SEAM)) {
       const size_t elem_size = sizeof(*((MEdge *)NULL));
       const size_t data_size = sizeof(((MEdge *)NULL)->flag);
diff --git a/source/blender/blenkernel/intern/deform.c b/source/blender/blenkernel/intern/deform.c
index f928079f3ea..7940d65b1bb 100644
--- a/source/blender/blenkernel/intern/deform.c
+++ b/source/blender/blenkernel/intern/deform.c
@@ -94,10 +94,10 @@ bDeformGroup *BKE_defgroup_duplicate(const bDeformGroup *ingroup)
 void BKE_defvert_copy_subset(MDeformVert *dvert_dst,
                              const MDeformVert *dvert_src,
                              const bool *vgroup_subset,
-                             const int vgroup_tot)
+                             const int vgroup_num)
 {
   int defgroup;
-  for (defgroup = 0; defgroup < vgroup_tot; defgroup++) {
+  for (defgroup = 0; defgroup < vgroup_num; defgroup++) {
     if (vgroup_subset[defgroup]) {
       BKE_defvert_copy_index(dvert_dst, defgroup, dvert_src, defgroup);
     }
@@ -107,12 +107,12 @@ void BKE_defvert_copy_subset(MDeformVert *dvert_dst,
 void BKE_defvert_mirror_subset(MDeformVert *dvert_dst,
                                const MDeformVert *dvert_src,
                                const bool *vgroup_subset,
-                               const int vgroup_tot,
+                               const int vgroup_num,
                                const int *flip_map,
-                               const int flip_map_len)
+                               const int flip_map_num)
 {
   int defgroup;
-  for (defgroup = 0; defgroup < vgroup_tot && defgroup < flip_map_len; defgroup++) {
+  for (defgroup = 0; defgroup < vgroup_num && defgroup < flip_map_num; defgroup++) {
     if (vgroup_subset[defgroup] && (dvert_dst != dvert_src || flip_map[defgroup] != defgroup)) {
       BKE_defvert_copy_index(dvert_dst, flip_map[defgroup], dvert_src, defgroup);
     }
@@ -189,13 +189,13 @@ void BKE_defvert_sync(MDeformVert *dvert_dst, const MDeformVert *dvert_src, cons
 void BKE_defvert_sync_mapped(MDeformVert *dvert_dst,
                              const MDeformVert *dvert_src,
                              const int *flip_map,
-                             const int flip_map_len,
+                             const int flip_map_num,
                              const bool use_ensure)
 {
   if (dvert_src->totweight && dvert_dst->totweight) {
     MDeformWeight *dw_src = dvert_src->dw;
     for (int i = 0; i < dvert_src->totweight; i++, dw_src++) {
-      if (dw_src->def_nr < flip_map_len) {
+      if (dw_src->def_nr < flip_map_num) {
         MDeformWeight *dw_dst;
         if (use_ensure) {
           dw_dst = BKE_defvert_ensure_index(dvert_dst, flip_map[dw_src->def_nr]);
@@ -226,14 +226,14 @@ void BKE_defvert_remap(MDeformVert *dvert, const int *map, const int map_len)
 
 void BKE_defvert_normalize_subset(MDeformVert *dvert,
                                   const bool *vgroup_subset,
-                                  const int vgroup_tot)
+                                  const int vgroup_num)
 {
   if (dvert->totweight == 0) {
     /* nothing */
   }
   else if (dvert->totweight == 1) {
     MDeformWeight *dw = dvert->dw;
-    if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
+    if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
       dw->weight = 1.0f;
     }
   }
@@ -241,7 +241,7 @@ void BKE_defvert_normalize_subset(MDeformVert *dvert,
     MDeformWeight *dw = dvert->dw;
     float tot_weight = 0.0f;
     for (int i = dvert->totweight; i != 0; i--, dw++) {
-      if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
+      if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
         tot_weight += dw->weight;
       }
     }
@@ -250,7 +250,7 @@ void BKE_defvert_normalize_subset(MDeformVert *dvert,
       float scalar = 1.0f / tot_weight;
       dw = dvert->dw;
       for (int i = dvert->totweight; i != 0; i--, dw++) {
-        if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
+        if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
           dw->weight *= scalar;
 
           /* in case of division errors with very low weights */
@@ -292,7 +292,7 @@ void BKE_defvert_normalize(MDeformVert *dvert)
 
 void BKE_defvert_normalize_lock_single(MDeformVert *dvert,
                                        const bool *vgroup_subset,
-                                       const int vgroup_tot,
+                                       const int vgroup_num,
                                        const uint def_nr_lock)
 {
   if (dvert->totweight == 0) {
@@ -300,7 +300,7 @@ void BKE_defvert_normalize_lock_single(MDeformVert *dvert,
   }
   else if (dvert->totweight == 1) {
     MDeformWeight *dw = dvert->dw;
-    if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
+    if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
       if (def_nr_lock != dw->def_nr) {
         dw->weight = 1.0f;
       }
@@ -314,7 +314,7 @@ void BKE_defvert_normalize_lock_single(MDeformVert *dvert,
     float lock_iweight = 1.0f;
 
     for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) {
-      if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
+      if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
         if (dw->def_nr != def_nr_lock) {
           tot_weight += dw->weight;
         }
@@ -331,7 +331,7 @@ void BKE_defvert_normalize_lock_single(MDeformVert *dvert,
 
       float scalar = (1.0f / tot_weight) * lock_iweight;
       for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) {
-        if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
+        if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
           if (dw != dw_lock) {
             dw->weight *= scalar;
 
@@ -346,17 +346,17 @@ void BKE_defvert_normalize_lock_single(MDeformVert *dvert,
 
 void BKE_defvert_normalize_lock_map(MDeformVert *dvert,
                                     const bool *vgroup_subset,
-                                    const int vgroup_tot,
+                                    const int vgroup_num,
                                     const bool *lock_flags,
-                                    const int defbase_tot)
+                                    const int defbase_num)
 {
   if (dvert->totweight == 0) {
     /* nothing */
   }
   else if (dvert->totweight == 1) {
     MDeformWeight *dw = dvert->dw;
-    if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
-      if ((dw->def_nr < defbase_tot) && (lock_flags[dw->def_nr] == false)) {
+    if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
+      if ((dw->def_nr < defbase_num) && (lock_flags[dw->def_nr] == false)) {
         dw->weight = 1.0f;
       }
     }
@@ -368,8 +368,8 @@ void BKE_defvert_normalize_lock_map(MDeformVert *dvert,
     float lock_iweight = 0.0f;
 
     for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) {
-      if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
-        if ((dw->def_nr < defbase_tot) && (lock_flags[dw->def_nr] == false)) {
+      if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
+        if ((dw->def_nr < defbase_num) && (lock_flags[dw->def_nr] == false)) {
           tot_weight += dw->weight;
         }
         else {
@@ -386,8 +386,8 @@ void BKE_defvert_normalize_lock_map(MDeformVert *dvert,
 
       float scalar = (1.0f / tot_weight) * lock_iweight;
       for (i = dvert->totweight, dw = dvert->dw; i != 0; i--, dw++) {
-        if ((dw->def_nr < vgroup_tot) && vgroup_subset[dw->def_nr]) {
-          if ((dw->def_nr < defbase_tot) && (lock_flags[dw->def_nr] == false)) {
+        if ((dw->def_nr < vgroup_num) && vgroup_subset[dw->def_nr]) {
+          if ((dw->def_nr < defbase_num) && (lock_flags[dw->def_nr] == false)) {
             dw->weight *= scalar;
 
             /* in case of division errors with very low weights */
@@ -399,13 +399,13 @@ void BKE_defvert_normalize_lock_map(MDeformVert *dvert,
   }
 }
 
-void BKE_defvert_flip(MDeformVert *dvert, const int *flip_map, const int flip_map_len)
+void BKE_defvert_flip(MDeformVert *dvert, const int *flip_map, const int flip_map_num)
 {
   MDeformWeight *dw;
   int i;
 
   for (dw = dvert->dw, i = 0; i < dvert->totweight; dw++, i++) {
-    if (dw->def_nr < flip_map_len) {
+    if (dw->def_nr < flip_map_num) {
       if (flip_map[dw->def_nr] >= 0) {
         dw->def_nr = flip_map[dw->def_nr];
       }
@@ -413,7 +413,7 @@ void BKE_defvert_flip(MDeformVert *dvert, const int *flip_map, const int flip_ma
   }
 }
 
-void BKE_defvert_flip_merged(MDeformVert *dvert, const int *flip_map, const int flip_map_len)
+void BKE_defvert_flip_merged(MDeformVert *dvert, const int *flip_map, const int flip_map_num)
 {
   MDeformWeight *dw, *dw_cpy;
   float weight;
@@ -421,7 +421,7 @@ void BKE_defvert_flip_merged(MDeformVert *dvert, const int *flip_map, const int
 
   /* copy weights */
   for (dw = dvert->dw, i = 0; i < totweight; dw++, i++) {
-    if (dw->def_nr < flip_map_len) {
+    if (dw->def_nr < flip_map_num) {
       if (flip_map[dw->def_nr] >= 0) {
         /* error checkers complain of this but we'll never get NULL return */
         dw_cpy = BKE_defvert_ensure_index(dvert, flip_map[dw->def_nr]);
@@ -572,20 +572,25 @@ void BKE_object_defgroup_active_index_set(Object *ob, const int new_index)
   *index = new_index;
 }
 
-int *BKE_object_defgroup_flip_map(const Object *ob, int *flip_map_len, const bool use_default)
+static int *object_defgroup_unlocked_flip_map_ex(const Object *ob,
+                                                 const bool use_default,
+                                                 const bool use_only_unlocked,
+                                                 int *r_flip_map_num)
 {
   const ListBase *defbase = BKE_object_defgroup_list(ob);
-  int defbase_tot = *flip_map_len = BLI_listbase_count(defbase);
+  const int defbase_num = BLI_listbase_count(defbase);
+  *r_flip_map_num = defbase_num;
 
-  if (defbase_tot == 0) {
+  if (defbase_num == 0) {
     return NULL;
   }
 
   bDeformGroup *dg;
   char name_flip[sizeof(dg->name)];
-  int i, flip_num, *map = MEM_mallocN(defbase_tot * sizeof(int), __func__);
+  int i, flip_num;
+  int *map = MEM_mallocN(defbase_num * sizeof(int), __func__);
 
-  for (i = 0; i < defbase_tot; i++) {
+  for (i = 0; i < defbase_num; i++) {
     map[i] = -1;
   }
 
@@ -597,11 +602,15 @@ int *BKE_object_defgroup_flip_map(const Object *ob, int *flip_map_len, const boo
         map[i] = i;
       }
 
+      if (use_only_unlocked && (dg->flag & DG_LOCK_WEIGHT)) {
+        continue;
+      }
+
       BLI_string_flip_side_name(name_flip, dg->name, false, sizeof(name_flip));
 
       if (!STREQ(name_flip, dg->name)) {
         flip_num = BKE_object_defgroup_name_index(ob, name_flip);
-        if (flip_num >= 0) {
+        if (flip_num != -1) {
           map[i] = flip_num;
           map[flip_num] = i; /* save an extra lookup */
         }
@@ -611,23 +620,36 @@ int *BKE_object_defgroup_flip_map(const Object *ob, int *flip_map_len, const boo
   return map;
 }
 
+int *BKE_object_defgroup_flip_map(const Object *ob, const bool use_default, int *r_flip_map_num)
+{
+  return object_defgroup_unlocked_flip_map_ex(ob, use_default, false, r_flip_map_num);
+}
+
+int *BKE_object_defgroup_flip_map_unlocked(const Object *ob,
+                                           const bool use_default,
+                                           int *r_flip_map_num)
+{
+  return object_defgroup_unlocked_flip_map_ex(ob, use_default, true, r_flip_map_num);
+}
+
 int *BKE_object_defgroup_flip_map_single(const Object *ob,
-                                         int *flip_map_len,
                                          const bool use_default,
-                                         int defgroup)
+                                         const int defgroup,
+                                         int *r_flip_map_num)
 {
   const ListBase *defbase = BKE_object_defgroup_list(ob);
-  int defbase_tot = *flip_map_len = BLI_listbase_count(defbase);
+  const int defbase_num = BLI_listbase_count(defbase);
+  *r_flip_map_num = defbase_num;
 
-  if (defbase_tot == 0) {
+  if (defbase_num == 0) {
     return NULL;
   }
 
   bDeformGroup *dg;
   char name_flip[sizeof(dg->name)];
-  int i, flip_num, *map = MEM_mallocN(defbase_tot * sizeof(int), __func__);
+  int i, flip_num, *map = MEM_mallocN(defbase_num * sizeof(int), __func__);
 
-  for (i = 0; i < defbase_tot; i++) {
+  for (i = 0; i < defbase_num; i++) {
     map[i] = use_default ? i : -1;
   }
 
@@ -776,7 +798,7 @@ MDeformWeight *BKE_defvert_ensure_index(MDeformVert *dvert, const int defgroup)
   return dw_new;
 }
 
-void BKE_defvert_add_index_notest(MDeformVert *dvert, int defgroup, const float weight)
+void BKE_defvert_add_index_notest(MDeformVert *dvert, const int defgroup, const float weight)
 {
   /* TODO: merge with #BKE_defvert_ensure_index! */
 
@@ -870,7 +892,7 @@ bool BKE_defvert_is_weight_zero(const struct MDeformVert *dvert, const int defgr
 }
 
 float BKE_defvert_total_selected_weight(const struct MDeformVert *dv,
-                                        int defbase_tot,
+                                        int defbase_num,
                                         const bool *defbase_sel)
 {
   float total = 0.0f;
@@ -881,7 +903,7 @@ float BKE_defvert_total_selected_weight(const struct MDeformVert *dv,
   }
 
   for (int i = dv->totweight; i != 0; i--, dw++) {
-    if (dw->def_nr < defbase_tot) {
+    if (dw->def_nr < defbase_num) {
       if (defbase_sel[dw->def_nr]) {
         total += dw->weight;
       }
@@ -892,17 +914,17 @@ float BKE_defvert_total_selected_weight(const struct MDeformVert *dv,
 }
 
 float BKE_defvert_multipaint_collective_weight(const struct MDeformVert *dv,
-                                               int defbase_tot,
+                                               const int defbase_num,
                                                const bool *defbase_sel,
-                                               int defbase_tot_sel,
-                                               bool is_normalized)
+                                               const int defbase_sel_num,
+                                               const bool is_normalized)
 {
-  float total = BKE_defvert_total_selected_weight(dv, defbase_tot, defbase_sel);
+  float total = BKE_defvert_total_selected_weight(dv, defbase_num, defbase_sel);
 
   /* in multipaint, get the average if auto normalize is inactive
    * get the sum if it is active */
   if (!is_normalized) {
-    total /= defbase_tot_sel;
+    total /= defbase_sel_num;
   }
 
   return total;
@@ -936,19 +958,19 @@ float BKE_defvert_calc_lock_relative_weight(float weight,
   return weight / (1.0f - locked_weight);
 }
 
-float BKE_defvert_lock_relative_weight(float weight,
+float BKE_defvert_lock_relative_weight(const float weight,
                                        const struct MDeformVert *dv,
-                                       int defbase_tot,
+                                       const int defbase_num,
                                        const bool *defbase_locked,
                                        const bool *defbase_unlocked)
 {
-  float unlocked = BKE_defvert_total_selected_weight(dv, defbase_tot, defbase_unlocked);
+  float unlocked = BKE_defvert_total_selected_weight(dv, defbase_num, defbase_unlocked);
 
   if (unlocked > 0.0f) {
     return weight / unlocked;
   }
 
-  float locked = BKE_defvert_total_selected_weight(dv, defbase_tot, defbase_locked);
+  float locked = BKE_defvert_total_selected_weight(dv, defbase_num, defbase_locked);
 
   return BKE_defvert_calc_lock_relative_weight(weight, locked, unlocked);
 }
@@ -1010,12 +1032,12 @@ void BKE_defvert_array_free(MDeformVert *dvert, int totvert)
 
 void BKE_defvert_extract_vgroup_to_vertweights(const MDeformVert *dvert,
                                                const int defgroup,
-                                               const int num_verts,
+                                               const int verts_num,
                                                const bool invert_vgroup,
                                                float *r_weights)
 {
   if (dvert && defgroup != -1) {
-    int i = num_verts;
+    int i = verts_num;
 
     while (i--) {
       const float w = BKE_defvert_find_weight(&dvert[i], defgroup);
@@ -1023,24 +1045,24 @@ void BKE_defvert_extract_vgroup_to_vertweights(const MDeformVert *dvert,
     }
   }
   else {
-    copy_vn_fl(r_weights, num_verts, invert_vgroup ? 1.0f : 0.0f);
+    copy_vn_fl(r_weights, verts_num, invert_vgroup ? 1.0f : 0.0f);
   }
 }
 
 void BKE_defvert_extract_vgroup_to_edgeweights(const MDeformVert *dvert,
                                                const int defgroup,
-                                               const int num_verts,
+                                               const int verts_num,
                                                const MEdge *edges,
-                                               const int num_edges,
+                                               const int edges_num,
                                                const bool invert_vgroup,
                                                float *r_weights)
 {
   if (dvert && defgroup != -1) {
-    int i = num_edges;
-    float *tmp_weights = MEM_mallocN(sizeof(*tmp_weights) * (size_t)num_verts, __func__);
+    int i = edges_num;
+    float *tmp_weights = MEM_mallocN(sizeof(*tmp_weights) * (size_t)verts_num, __func__);
 
     BKE_defvert_extract_vgroup_to_vertweights(
-        dvert, defgroup, num_verts, invert_vgroup, tmp_weights);
+        dvert, defgroup, verts_num, invert_vgroup, tmp_weights);
 
     while (i--) {
       const MEdge *me = &edges[i];
@@ -1051,24 +1073,24 @@ void BKE_defvert_extract_vgroup_to_edgeweights(const MDeformVert *dvert,
     MEM_freeN(tmp_weights);
   }
   else {
-    copy_vn_fl(r_weights, num_edges, 0.0f);
+    copy_vn_fl(r_weights, edges_num, 0.0f);
   }
 }
 
 void BKE_defvert_extract_vgroup_to_loopweights(const MDeformVert *dvert,
                                                const int defgroup,
-                                               const int num_verts,
+                                               const int verts_num,
                                                const MLoop *loops,
-                                               const int num_loops,
+                                               const int loops_num,
                                                const bool invert_vgroup,
                                                float *r_weights)
 {
   if (dvert && defgroup != -1) {
-    int i = num_loops;
-    float *tmp_weights = MEM_mallocN(sizeof(*tmp_weights) * (size_t)num_verts, __func__);
+    int i = loops_num;
+    float *tmp_weights = MEM_mallocN(sizeof(*tmp_weights) * (size_t)verts_num, __func__);
 
     BKE_defvert_extract_vgroup_to_vertweights(
-        dvert, defgroup, num_verts, invert_vgroup, tmp_weights);
+        dvert, defgroup, verts_num, invert_vgroup, tmp_weights);
 
     while (i--) {
       const MLoop *ml = &loops[i];
@@ -1079,26 +1101,26 @@ void BKE_defvert_extract_vgroup_to_loopweights(const MDeformVert *dvert,
     MEM_freeN(tmp_weights);
   }
   else {
-    copy_vn_fl(r_weights, num_loops, 0.0f);
+    copy_vn_fl(r_weights, loops_num, 0.0f);
   }
 }
 
 void BKE_defvert_extract_vgroup_to_polyweights(const MDeformVert *dvert,
                                                const int defgroup,
-                                               const int num_verts,
+                                               const int verts_num,
                                                const MLoop *loops,
-                                               const int UNUSED(num_loops),
+                                               const int UNUSED(loops_num),
                                                const MPoly *polys,
-                                               const int num_polys,
+                                               const int polys_num,
                                                const bool invert_vgroup,
                                                float *r_weights)
 {
   if (dvert && defgroup != -1) {
-    int i = num_polys;
-    float *tmp_weights = MEM_mallocN(sizeof(*tmp_weights) * (size_t)num_verts, __func__);
+    int i = polys_num;
+    float *tmp_weights = MEM_mallocN(sizeof(*tmp_weights) * (size_t)verts_num, __func__);
 
     BKE_defvert_extract_vgroup_to_vertweights(
-        dvert, defgroup, num_verts, invert_vgroup, tmp_weights);
+        dvert, defgroup, verts_num, invert_vgroup, tmp_weights);
 
     while (i--) {
       const MPoly *mp = &polys[i];
@@ -1115,7 +1137,7 @@ void BKE_defvert_extract_vgroup_to_polyweights(const MDeformVert *dvert,
     MEM_freeN(tmp_weights);
   }
   else {
-    copy_vn_fl(r_weights, num_polys, 0.0f);
+    copy_vn_fl(r_weights, polys_num, 0.0f);
   }
 }
 
@@ -1207,7 +1229,7 @@ static bool data_transfer_layersmapping_vgroups_multisrc_to_dst(ListBase *r_map,
   const ListBase *src_list = BKE_object_defgroup_list(ob_src);
   ListBase *dst_defbase = BKE_object_defgroup_list_mutable(ob_dst);
 
-  int tot_dst = BLI_listbase_count(dst_defbase);
+  const int tot_dst = BLI_listbase_count(dst_defbase);
 
   const size_t elem_size = sizeof(*((MDeformVert *)NULL));
 
diff --git a/source/blender/blenkernel/intern/key.c b/source/blender/blenkernel/intern/key.c
index a4475869c2a..2ba81c54872 100644
--- a/source/blender/blenkernel/intern/key.c
+++ b/source/blender/blenkernel/intern/key.c
@@ -1938,6 +1938,16 @@ KeyBlock *BKE_keyblock_find_name(Key *key, const char name[])
   return BLI_findstring(&key->block, name, offsetof(KeyBlock, name));
 }
 
+KeyBlock *BKE_keyblock_find_uid(Key *key, const int uid)
+{
+  LISTBASE_FOREACH (KeyBlock *, kb, &key->block) {
+    if (kb->uid == uid) {
+      return kb;
+    }
+  }
+  return NULL;
+}
+
 void BKE_keyblock_copy_settings(KeyBlock *kb_dst, const KeyBlock *kb_src)
 {
   kb_dst->pos = kb_src->pos;
diff --git a/source/blender/blenkernel/intern/mball_tessellate.c b/source/blender/blenkernel/intern/mball_tessellate.c
index 3917c020759..49963c333ec 100644
--- a/source/blender/blenkernel/intern/mball_tessellate.c
+++ b/source/blender/blenkernel/intern/mball_tessellate.c
@@ -1447,7 +1447,6 @@ Mesh *BKE_mball_polygonize(Depsgraph *depsgraph, Scene *scene, Object *ob)
   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;
     mvert->flag = 0;
   }
   MEM_freeN(process.co);
diff --git a/source/blender/blenkernel/intern/mesh.cc b/source/blender/blenkernel/intern/mesh.cc
index 8254bb953d2..a5b50824542 100644
--- a/source/blender/blenkernel/intern/mesh.cc
+++ b/source/blender/blenkernel/intern/mesh.cc
@@ -251,6 +251,7 @@ static void mesh_blend_write(BlendWriter *writer, ID *id, const void *id_address
     if (!BLO_write_is_undo(writer)) {
       BKE_mesh_legacy_convert_hide_layers_to_flags(mesh);
       BKE_mesh_legacy_convert_material_indices_to_mpoly(mesh);
+      BKE_mesh_legacy_bevel_weight_from_layers(mesh);
       /* When converting to the old mesh format, don't save redundant attributes. */
       names_to_skip.add_multiple_new({".hide_vert", ".hide_edge", ".hide_poly"});
 
@@ -348,6 +349,7 @@ static void mesh_blend_read_data(BlendDataReader *reader, ID *id)
   if (!BLO_read_data_is_undo(reader)) {
     BKE_mesh_legacy_convert_flags_to_hide_layers(mesh);
     BKE_mesh_legacy_convert_mpoly_to_material_indices(mesh);
+    BKE_mesh_legacy_bevel_weight_to_layers(mesh);
   }
 
   /* We don't expect to load normals from files, since they are derived data. */
@@ -881,11 +883,12 @@ static void mesh_clear_geometry(Mesh *mesh)
   mesh->totpoly = 0;
   mesh->act_face = -1;
   mesh->totselect = 0;
+
+  BLI_freelistN(&mesh->vertex_group_names);
 }
 
 void BKE_mesh_clear_geometry(Mesh *mesh)
 {
-  BKE_animdata_free(&mesh->id, false);
   BKE_mesh_runtime_clear_cache(mesh);
   mesh_clear_geometry(mesh);
 }
@@ -975,6 +978,7 @@ void BKE_mesh_copy_parameters(Mesh *me_dst, const Mesh *me_src)
   copy_v3_v3(me_dst->size, me_src->size);
 
   me_dst->vertex_group_active_index = me_src->vertex_group_active_index;
+  me_dst->attributes_active_index = me_src->attributes_active_index;
 }
 
 void BKE_mesh_copy_parameters_for_eval(Mesh *me_dst, const Mesh *me_src)
diff --git a/source/blender/blenkernel/intern/mesh_boolean_convert.cc b/source/blender/blenkernel/intern/mesh_boolean_convert.cc
index 4b08e0b2ed5..7a04e45fe00 100644
--- a/source/blender/blenkernel/intern/mesh_boolean_convert.cc
+++ b/source/blender/blenkernel/intern/mesh_boolean_convert.cc
@@ -381,7 +381,6 @@ static void copy_vert_attributes(Mesh *dest_mesh,
                                  int mv_index,
                                  int index_in_orig_me)
 {
-  mv->bweight = orig_mv->bweight;
   mv->flag = orig_mv->flag;
 
   /* For all layers in the orig mesh, copy the layer information. */
@@ -450,7 +449,6 @@ static void copy_edge_attributes(Mesh *dest_mesh,
                                  int medge_index,
                                  int index_in_orig_me)
 {
-  medge->bweight = orig_medge->bweight;
   medge->crease = orig_medge->crease;
   medge->flag = orig_medge->flag;
   CustomData *target_cd = &dest_mesh->edata;
diff --git a/source/blender/blenkernel/intern/mesh_convert.cc b/source/blender/blenkernel/intern/mesh_convert.cc
index a8ff90c128a..b7d8972aa7b 100644
--- a/source/blender/blenkernel/intern/mesh_convert.cc
+++ b/source/blender/blenkernel/intern/mesh_convert.cc
@@ -54,9 +54,11 @@
 #include "DEG_depsgraph.h"
 #include "DEG_depsgraph_query.h"
 
+using blender::float3;
 using blender::IndexRange;
 using blender::MutableSpan;
 using blender::Span;
+using blender::StringRefNull;
 
 /* Define for cases when you want extra validation of mesh
  * after certain modifications.
@@ -116,7 +118,7 @@ static void make_edges_mdata_extend(Mesh &mesh)
       BLI_edgehashIterator_getKey(ehi, &medge->v1, &medge->v2);
       BLI_edgehashIterator_setValue(ehi, POINTER_FROM_UINT(e_index));
 
-      medge->crease = medge->bweight = 0;
+      medge->crease = 0;
       medge->flag = ME_EDGEDRAW | ME_EDGERENDER;
     }
     BLI_edgehashIterator_free(ehi);
@@ -1081,7 +1083,7 @@ Mesh *BKE_mesh_new_from_object_to_bmain(Main *bmain,
   mesh_in_bmain->smoothresh = mesh->smoothresh;
   mesh->mat = nullptr;
 
-  BKE_mesh_nomain_to_mesh(mesh, mesh_in_bmain, nullptr, &CD_MASK_MESH, true);
+  BKE_mesh_nomain_to_mesh(mesh, mesh_in_bmain, nullptr);
 
   /* Anonymous attributes shouldn't exist on original data. */
   mesh_in_bmain->attributes_for_write().remove_anonymous();
@@ -1235,239 +1237,113 @@ Mesh *BKE_mesh_create_derived_for_modifier(struct Depsgraph *depsgraph,
   return result;
 }
 
-/* This is a Mesh-based copy of the same function in DerivedMesh.cc */
-static void shapekey_layers_to_keyblocks(Mesh *mesh_src, Mesh *mesh_dst, int actshape_uid)
+static KeyBlock *keyblock_ensure_from_uid(Key &key, const int uid, const StringRefNull name)
 {
-  KeyBlock *kb;
-  int i, j, tot;
-
-  if (!mesh_dst->key) {
-    return;
+  if (KeyBlock *kb = BKE_keyblock_find_uid(&key, uid)) {
+    return kb;
   }
+  KeyBlock *kb = BKE_keyblock_add(&key, name.c_str());
+  kb->uid = uid;
+  return kb;
+}
 
-  tot = CustomData_number_of_layers(&mesh_src->vdata, CD_SHAPEKEY);
-  for (i = 0; i < tot; i++) {
-    CustomDataLayer *layer =
-        &mesh_src->vdata.layers[CustomData_get_layer_index_n(&mesh_src->vdata, CD_SHAPEKEY, i)];
-    float(*kbcos)[3];
-
-    for (kb = (KeyBlock *)mesh_dst->key->block.first; kb; kb = kb->next) {
-      if (kb->uid == layer->uid) {
-        break;
-      }
-    }
+static int find_object_active_key_uid(const Key &key, const Object &object)
+{
+  const int active_kb_index = object.shapenr - 1;
+  const KeyBlock *kb = (const KeyBlock *)BLI_findlink(&key.block, active_kb_index);
+  if (!kb) {
+    CLOG_ERROR(&LOG, "Could not find object's active shapekey %d", active_kb_index);
+    return -1;
+  }
+  return kb->uid;
+}
 
-    if (!kb) {
-      kb = BKE_keyblock_add(mesh_dst->key, layer->name);
-      kb->uid = layer->uid;
-    }
+static void move_shapekey_layers_to_keyblocks(Mesh &mesh, Key &key_dst, const int actshape_uid)
+{
+  using namespace blender::bke;
+  for (const int i : IndexRange(CustomData_number_of_layers(&mesh.vdata, CD_SHAPEKEY))) {
+    const int layer_index = CustomData_get_layer_index_n(&mesh.vdata, CD_SHAPEKEY, i);
+    CustomDataLayer &layer = mesh.vdata.layers[layer_index];
 
-    if (kb->data) {
-      MEM_freeN(kb->data);
-    }
+    KeyBlock *kb = keyblock_ensure_from_uid(key_dst, layer.uid, layer.name);
+    MEM_SAFE_FREE(kb->data);
 
-    const float(*cos)[3] = (const float(*)[3])CustomData_get_layer_n(
-        &mesh_src->vdata, CD_SHAPEKEY, i);
-    kb->totelem = mesh_src->totvert;
+    kb->totelem = mesh.totvert;
 
-    kb->data = kbcos = (float(*)[3])MEM_malloc_arrayN(kb->totelem, sizeof(float[3]), __func__);
     if (kb->uid == actshape_uid) {
-      const Span<MVert> verts = mesh_src->verts();
-      for (j = 0; j < mesh_src->totvert; j++, kbcos++) {
-        copy_v3_v3(*kbcos, verts[j].co);
-      }
+      kb->data = MEM_malloc_arrayN(kb->totelem, sizeof(float3), __func__);
+      MutableSpan<float3> kb_coords(static_cast<float3 *>(kb->data), kb->totelem);
+      mesh.attributes().lookup<float3>("position").materialize(kb_coords);
     }
     else {
-      for (j = 0; j < kb->totelem; j++, cos++, kbcos++) {
-        copy_v3_v3(*kbcos, *cos);
-      }
+      kb->data = layer.data;
+      layer.data = nullptr;
     }
   }
 
-  for (kb = (KeyBlock *)mesh_dst->key->block.first; kb; kb = kb->next) {
-    if (kb->totelem != mesh_src->totvert) {
-      if (kb->data) {
-        MEM_freeN(kb->data);
-      }
-
-      kb->totelem = mesh_src->totvert;
-      kb->data = MEM_calloc_arrayN(kb->totelem, sizeof(float[3]), __func__);
-      CLOG_ERROR(&LOG, "lost a shapekey layer: '%s'! (bmesh internal error)", kb->name);
+  LISTBASE_FOREACH (KeyBlock *, kb, &key_dst.block) {
+    if (kb->totelem != mesh.totvert) {
+      MEM_SAFE_FREE(kb->data);
     }
+    kb->totelem = mesh.totvert;
+    kb->data = MEM_cnew_array<float3>(kb->totelem, __func__);
+    CLOG_ERROR(&LOG, "Data for shape key '%s' on mesh missing from evaluated mesh ", kb->name);
   }
 }
 
-void BKE_mesh_nomain_to_mesh(Mesh *mesh_src,
-                             Mesh *mesh_dst,
-                             Object *ob,
-                             const CustomData_MeshMasks *mask,
-                             bool take_ownership)
+void BKE_mesh_nomain_to_mesh(Mesh *mesh_src, Mesh *mesh_dst, Object *ob)
 {
   using namespace blender::bke;
   BLI_assert(mesh_src->id.tag & LIB_TAG_NO_MAIN);
-
-  /* mesh_src might depend on mesh_dst, so we need to do everything with a local copy */
-  /* TODO(Sybren): the above claim came from 2.7x derived-mesh code (DM_to_mesh);
-   * check whether it is still true with Mesh */
-  Mesh tmp = blender::dna::shallow_copy(*mesh_dst);
-  int totvert, totedge /*, totface */ /* UNUSED */, totloop, totpoly;
-  bool did_shapekeys = false;
-  eCDAllocType alloctype = CD_DUPLICATE;
-
-  if (take_ownership /* && dm->type == DM_TYPE_CDDM && dm->needsFree */) {
-    bool has_any_referenced_layers = CustomData_has_referenced(&mesh_src->vdata) ||
-                                     CustomData_has_referenced(&mesh_src->edata) ||
-                                     CustomData_has_referenced(&mesh_src->ldata) ||
-                                     CustomData_has_referenced(&mesh_src->fdata) ||
-                                     CustomData_has_referenced(&mesh_src->pdata);
-    if (!has_any_referenced_layers) {
-      alloctype = CD_ASSIGN;
-    }
-  }
-  CustomData_reset(&tmp.vdata);
-  CustomData_reset(&tmp.edata);
-  CustomData_reset(&tmp.fdata);
-  CustomData_reset(&tmp.ldata);
-  CustomData_reset(&tmp.pdata);
-
-  totvert = tmp.totvert = mesh_src->totvert;
-  totedge = tmp.totedge = mesh_src->totedge;
-  totloop = tmp.totloop = mesh_src->totloop;
-  totpoly = tmp.totpoly = mesh_src->totpoly;
-  tmp.totface = 0;
-
-  CustomData_copy(&mesh_src->vdata, &tmp.vdata, mask->vmask, alloctype, totvert);
-  CustomData_copy(&mesh_src->edata, &tmp.edata, mask->emask, alloctype, totedge);
-  CustomData_copy(&mesh_src->ldata, &tmp.ldata, mask->lmask, alloctype, totloop);
-  CustomData_copy(&mesh_src->pdata, &tmp.pdata, mask->pmask, alloctype, totpoly);
-  tmp.cd_flag = mesh_src->cd_flag;
-  tmp.runtime.deformed_only = mesh_src->runtime.deformed_only;
-
-  /* Clear the normals completely, since the new vertex / polygon count might be different. */
-  BKE_mesh_clear_derived_normals(&tmp);
-
-  if (CustomData_has_layer(&mesh_src->vdata, CD_SHAPEKEY)) {
-    KeyBlock *kb;
-    int uid;
-
-    if (ob) {
-      kb = (KeyBlock *)BLI_findlink(&mesh_dst->key->block, ob->shapenr - 1);
-      if (kb) {
-        uid = kb->uid;
-      }
-      else {
-        CLOG_ERROR(&LOG, "could not find active shapekey %d!", ob->shapenr - 1);
-
-        uid = INT_MAX;
-      }
-    }
-    else {
-      /* if no object, set to INT_MAX so we don't mess up any shapekey layers */
-      uid = INT_MAX;
-    }
-
-    shapekey_layers_to_keyblocks(mesh_src, mesh_dst, uid);
-    did_shapekeys = true;
-  }
-
-  /* copy texture space */
   if (ob) {
-    BKE_mesh_texspace_copy_from_object(&tmp, ob);
+    BLI_assert(mesh_dst == ob->data);
   }
 
-  /* not all DerivedMeshes store their verts/edges/faces in CustomData, so
-   * we set them here in case they are missing */
-  /* TODO(Sybren): we could probably replace CD_ASSIGN with alloctype and
-   * always directly pass mesh_src->mxxx, instead of using a ternary operator. */
-  if (!CustomData_has_layer(&tmp.vdata, CD_MVERT)) {
-    CustomData_add_layer(&tmp.vdata,
-                         CD_MVERT,
-                         CD_ASSIGN,
-                         (alloctype == CD_ASSIGN) ? mesh_src->verts_for_write().data() :
-                                                    MEM_dupallocN(mesh_src->verts().data()),
-                         totvert);
-  }
-  if (!CustomData_has_layer(&tmp.edata, CD_MEDGE)) {
-    CustomData_add_layer(&tmp.edata,
-                         CD_MEDGE,
-                         CD_ASSIGN,
-                         (alloctype == CD_ASSIGN) ? mesh_src->edges_for_write().data() :
-                                                    MEM_dupallocN(mesh_src->edges().data()),
-                         totedge);
-  }
-  if (!CustomData_has_layer(&tmp.pdata, CD_MPOLY)) {
-    CustomData_add_layer(&tmp.ldata,
-                         CD_MLOOP,
-                         CD_ASSIGN,
-                         (alloctype == CD_ASSIGN) ? mesh_src->loops_for_write().data() :
-                                                    MEM_dupallocN(mesh_src->loops().data()),
-                         tmp.totloop);
-    CustomData_add_layer(&tmp.pdata,
-                         CD_MPOLY,
-                         CD_ASSIGN,
-                         (alloctype == CD_ASSIGN) ? mesh_src->polys_for_write().data() :
-                                                    MEM_dupallocN(mesh_src->polys().data()),
-                         tmp.totpoly);
-  }
-
-  /* object had got displacement layer, should copy this layer to save sculpted data */
-  /* NOTE(nazgul): maybe some other layers should be copied? */
-  if (CustomData_has_layer(&mesh_dst->ldata, CD_MDISPS)) {
-    if (totloop == mesh_dst->totloop) {
-      MDisps *mdisps = (MDisps *)CustomData_get_layer(&mesh_dst->ldata, CD_MDISPS);
-      CustomData_add_layer(&tmp.ldata, CD_MDISPS, alloctype, mdisps, totloop);
-      if (alloctype == CD_ASSIGN) {
-        /* Assign nullptr to prevent double-free. */
-        CustomData_set_layer(&mesh_dst->ldata, CD_MDISPS, nullptr);
-      }
-    }
-  }
+  BKE_mesh_clear_geometry(mesh_dst);
 
-  CustomData_free(&mesh_dst->vdata, mesh_dst->totvert);
-  CustomData_free(&mesh_dst->edata, mesh_dst->totedge);
-  CustomData_free(&mesh_dst->fdata, mesh_dst->totface);
-  CustomData_free(&mesh_dst->ldata, mesh_dst->totloop);
-  CustomData_free(&mesh_dst->pdata, mesh_dst->totpoly);
-
-  /* ok, this should now use new CD shapekey data,
-   * which should be fed through the modifier
-   * stack */
-  if (tmp.totvert != mesh_dst->totvert && !did_shapekeys && mesh_dst->key) {
-    CLOG_ERROR(&LOG, "YEEK! this should be recoded! Shape key loss!: ID '%s'", tmp.id.name);
-    if (tmp.key && !(tmp.id.tag & LIB_TAG_NO_MAIN)) {
-      id_us_min(&tmp.key->id);
-    }
-    tmp.key = nullptr;
-  }
-
-  /* Clear selection history */
-  MEM_SAFE_FREE(tmp.mselect);
-  tmp.totselect = 0;
-  tmp.texflag &= ~ME_AUTOSPACE_EVALUATED;
+  /* Make sure referenced layers have a single user so assigning them to the mesh in main doesn't
+   * share them. "Referenced" layers are not expected to be shared between original meshes. */
+  CustomData_duplicate_referenced_layers(&mesh_src->vdata, mesh_src->totvert);
+  CustomData_duplicate_referenced_layers(&mesh_src->edata, mesh_src->totedge);
+  CustomData_duplicate_referenced_layers(&mesh_src->pdata, mesh_src->totpoly);
+  CustomData_duplicate_referenced_layers(&mesh_src->ldata, mesh_src->totloop);
 
-  /* Clear any run-time data.
-   * Even though this mesh won't typically have run-time data, the Python API can for e.g.
-   * create loop-triangle cache here, which is confusing when left in the mesh, see: T81136. */
-  BKE_mesh_runtime_clear_geometry(&tmp);
+  mesh_dst->totvert = mesh_src->totvert;
+  mesh_dst->totedge = mesh_src->totedge;
+  mesh_dst->totpoly = mesh_src->totpoly;
+  mesh_dst->totloop = mesh_src->totloop;
 
-  /* skip the listbase */
-  MEMCPY_STRUCT_AFTER(mesh_dst, &tmp, id.prev);
+  /* Using #CD_MASK_MESH ensures that only data that should exist in Main meshes is moved. */
+  const CustomData_MeshMasks mask = CD_MASK_MESH;
+  CustomData_copy(&mesh_src->vdata, &mesh_dst->vdata, mask.vmask, CD_ASSIGN, mesh_src->totvert);
+  CustomData_copy(&mesh_src->edata, &mesh_dst->edata, mask.emask, CD_ASSIGN, mesh_src->totedge);
+  CustomData_copy(&mesh_src->pdata, &mesh_dst->pdata, mask.pmask, CD_ASSIGN, mesh_src->totpoly);
+  CustomData_copy(&mesh_src->ldata, &mesh_dst->ldata, mask.lmask, CD_ASSIGN, mesh_src->totloop);
 
   BLI_freelistN(&mesh_dst->vertex_group_names);
-  BKE_defgroup_copy_list(&mesh_dst->vertex_group_names, &mesh_src->vertex_group_names);
-  mesh_dst->vertex_group_active_index = mesh_src->vertex_group_active_index;
-
-  if (take_ownership) {
-    if (alloctype == CD_ASSIGN) {
-      CustomData_free_typemask(&mesh_src->vdata, mesh_src->totvert, ~mask->vmask);
-      CustomData_free_typemask(&mesh_src->edata, mesh_src->totedge, ~mask->emask);
-      CustomData_free_typemask(&mesh_src->ldata, mesh_src->totloop, ~mask->lmask);
-      CustomData_free_typemask(&mesh_src->pdata, mesh_src->totpoly, ~mask->pmask);
+  mesh_dst->vertex_group_names = mesh_src->vertex_group_names;
+  BLI_listbase_clear(&mesh_src->vertex_group_names);
+
+  BKE_mesh_copy_parameters(mesh_dst, mesh_src);
+  mesh_dst->cd_flag = mesh_src->cd_flag;
+
+  /* For original meshes, shape key data is stored in the #Key data-block, so it
+   * must be moved from the storage in #CustomData layers used for evaluation. */
+  if (Key *key_dst = mesh_dst->key) {
+    if (CustomData_has_layer(&mesh_src->vdata, CD_SHAPEKEY)) {
+      /* If no object, set to -1 so we don't mess up any shapekey layers. */
+      const int uid_active = ob ? find_object_active_key_uid(*key_dst, *ob) : -1;
+      move_shapekey_layers_to_keyblocks(*mesh_src, *key_dst, uid_active);
+    }
+    else if (mesh_src->totvert != mesh_dst->totvert) {
+      CLOG_ERROR(&LOG, "Mesh in Main '%s' lost shape keys", mesh_src->id.name);
+      if (mesh_src->key) {
+        id_us_min(&mesh_src->key->id);
+      }
     }
-    BKE_id_free(nullptr, mesh_src);
   }
 
-  BKE_mesh_assert_normals_dirty_or_calculated(mesh_dst);
+  BKE_id_free(nullptr, mesh_src);
 }
 
 void BKE_mesh_nomain_to_meshkey(Mesh *mesh_src, Mesh *mesh_dst, KeyBlock *kb)
diff --git a/source/blender/blenkernel/intern/mesh_debug.cc b/source/blender/blenkernel/intern/mesh_debug.cc
index 1826a77d6f4..8a9ce901923 100644
--- a/source/blender/blenkernel/intern/mesh_debug.cc
+++ b/source/blender/blenkernel/intern/mesh_debug.cc
@@ -30,12 +30,6 @@
 static void mesh_debug_info_from_cd_flag(const Mesh *me, DynStr *dynstr)
 {
   BLI_dynstr_append(dynstr, "'cd_flag': {");
-  if (me->cd_flag & ME_CDFLAG_VERT_BWEIGHT) {
-    BLI_dynstr_append(dynstr, "'VERT_BWEIGHT', ");
-  }
-  if (me->cd_flag & ME_CDFLAG_EDGE_BWEIGHT) {
-    BLI_dynstr_append(dynstr, "'EDGE_BWEIGHT', ");
-  }
   if (me->cd_flag & ME_CDFLAG_EDGE_CREASE) {
     BLI_dynstr_append(dynstr, "'EDGE_CREASE', ");
   }
diff --git a/source/blender/blenkernel/intern/mesh_legacy_convert.cc b/source/blender/blenkernel/intern/mesh_legacy_convert.cc
index 2f67e303095..10fc8ff3195 100644
--- a/source/blender/blenkernel/intern/mesh_legacy_convert.cc
+++ b/source/blender/blenkernel/intern/mesh_legacy_convert.cc
@@ -918,6 +918,67 @@ void BKE_mesh_add_mface_layers(CustomData *fdata, CustomData *ldata, int total)
 /** \} */
 
 /* -------------------------------------------------------------------- */
+/** \name Bevel Weight Conversion
+ * \{ */
+
+void BKE_mesh_legacy_bevel_weight_from_layers(Mesh *mesh)
+{
+  using namespace blender;
+  MutableSpan<MVert> verts = mesh->verts_for_write();
+  if (const float *weights = static_cast<const float *>(
+          CustomData_get_layer(&mesh->vdata, CD_BWEIGHT))) {
+    mesh->cd_flag |= ME_CDFLAG_VERT_BWEIGHT;
+    for (const int i : verts.index_range()) {
+      verts[i].bweight = std::clamp(weights[i], 0.0f, 1.0f) * 255.0f;
+    }
+  }
+  else {
+    mesh->cd_flag &= ~ME_CDFLAG_VERT_BWEIGHT;
+    for (const int i : verts.index_range()) {
+      verts[i].bweight = 0;
+    }
+  }
+  MutableSpan<MEdge> edges = mesh->edges_for_write();
+  if (const float *weights = static_cast<const float *>(
+          CustomData_get_layer(&mesh->edata, CD_BWEIGHT))) {
+    mesh->cd_flag |= ME_CDFLAG_EDGE_BWEIGHT;
+    for (const int i : edges.index_range()) {
+      edges[i].bweight = std::clamp(weights[i], 0.0f, 1.0f) * 255.0f;
+    }
+  }
+  else {
+    mesh->cd_flag &= ~ME_CDFLAG_EDGE_BWEIGHT;
+    for (const int i : edges.index_range()) {
+      edges[i].bweight = 0;
+    }
+  }
+}
+
+void BKE_mesh_legacy_bevel_weight_to_layers(Mesh *mesh)
+{
+  using namespace blender;
+  const Span<MVert> verts = mesh->verts();
+  if (mesh->cd_flag & ME_CDFLAG_VERT_BWEIGHT) {
+    float *weights = static_cast<float *>(
+        CustomData_add_layer(&mesh->vdata, CD_BWEIGHT, CD_CONSTRUCT, nullptr, verts.size()));
+    for (const int i : verts.index_range()) {
+      weights[i] = verts[i].bweight / 255.0f;
+    }
+  }
+
+  const Span<MEdge> edges = mesh->edges();
+  if (mesh->cd_flag & ME_CDFLAG_EDGE_BWEIGHT) {
+    float *weights = static_cast<float *>(
+        CustomData_add_layer(&mesh->edata, CD_BWEIGHT, CD_CONSTRUCT, nullptr, edges.size()));
+    for (const int i : edges.index_range()) {
+      weights[i] = edges[i].bweight / 255.0f;
+    }
+  }
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
 /** \name Hide Attribute and Legacy Flag Conversion
  * \{ */
 
diff --git a/source/blender/blenkernel/intern/mesh_mirror.c b/source/blender/blenkernel/intern/mesh_mirror.c
index 2a64f6628f2..261bc3d150b 100644
--- a/source/blender/blenkernel/intern/mesh_mirror.c
+++ b/source/blender/blenkernel/intern/mesh_mirror.c
@@ -208,8 +208,8 @@ Mesh *BKE_mesh_mirror_apply_mirror_on_axis_for_modifier(MirrorModifierData *mmd,
   CustomData_copy_data(&mesh->ldata, &result->ldata, 0, 0, maxLoops);
   CustomData_copy_data(&mesh->pdata, &result->pdata, 0, 0, maxPolys);
 
-  /* Subsurf for eg won't have mesh data in the custom-data arrays.
-   * now add mvert/medge/mpoly layers. */
+  /* Subdivision-surface for eg won't have mesh data in the custom-data arrays.
+   * Now add #MVert/#MEdge/#MPoly layers. */
   if (!CustomData_has_layer(&mesh->vdata, CD_MVERT)) {
     memcpy(BKE_mesh_verts_for_write(result), BKE_mesh_verts(mesh), sizeof(MVert) * mesh->totvert);
   }
@@ -450,7 +450,7 @@ Mesh *BKE_mesh_mirror_apply_mirror_on_axis_for_modifier(MirrorModifierData *mmd,
     MDeformVert *dvert = BKE_mesh_deform_verts_for_write(result) + maxVerts;
     int *flip_map = NULL, flip_map_len = 0;
 
-    flip_map = BKE_object_defgroup_flip_map(ob, &flip_map_len, false);
+    flip_map = BKE_object_defgroup_flip_map(ob, false, &flip_map_len);
 
     if (flip_map) {
       for (i = 0; i < maxVerts; dvert++, i++) {
diff --git a/source/blender/blenkernel/intern/mesh_tangent.cc b/source/blender/blenkernel/intern/mesh_tangent.cc
index 3c1cdf84b3d..8f9af5e9258 100644
--- a/source/blender/blenkernel/intern/mesh_tangent.cc
+++ b/source/blender/blenkernel/intern/mesh_tangent.cc
@@ -68,7 +68,7 @@ struct BKEMeshToTangent {
   }
 
   const MPoly *mpolys;     /* faces */
-  const MLoop *mloops;     /* faces's vertices */
+  const MLoop *mloops;     /* faces vertices */
   const MVert *mverts;     /* vertices */
   const MLoopUV *luvs;     /* texture coordinates */
   const float (*lnors)[3]; /* loops' normals */
diff --git a/source/blender/blenkernel/intern/multires_unsubdivide.c b/source/blender/blenkernel/intern/multires_unsubdivide.c
index 9a0f7aa2126..353fbec6933 100644
--- a/source/blender/blenkernel/intern/multires_unsubdivide.c
+++ b/source/blender/blenkernel/intern/multires_unsubdivide.c
@@ -1252,7 +1252,7 @@ int multiresModifier_rebuild_subdiv(struct Depsgraph *depsgraph,
   }
 
   /* Copy the new base mesh to the original mesh. */
-  BKE_mesh_nomain_to_mesh(unsubdiv_context.base_mesh, object->data, object, &CD_MASK_MESH, true);
+  BKE_mesh_nomain_to_mesh(unsubdiv_context.base_mesh, object->data, object);
   Mesh *base_mesh = object->data;
   multires_create_grids_in_unsubdivided_base_mesh(&unsubdiv_context, base_mesh);
 
diff --git a/source/blender/blenkernel/intern/node.cc b/source/blender/blenkernel/intern/node.cc
index fadcceae393..2ae0b456b0d 100644
--- a/source/blender/blenkernel/intern/node.cc
+++ b/source/blender/blenkernel/intern/node.cc
@@ -1931,6 +1931,9 @@ static void node_socket_free(bNodeSocket *sock, const bool do_id_user)
     }
     MEM_freeN(sock->default_value);
   }
+  if (sock->default_attribute_name) {
+    MEM_freeN(sock->default_attribute_name);
+  }
   MEM_delete(sock->runtime);
 }
 
@@ -3015,6 +3018,9 @@ static void node_socket_interface_free(bNodeTree *UNUSED(ntree),
     }
     MEM_freeN(sock->default_value);
   }
+  if (sock->default_attribute_name) {
+    MEM_freeN(sock->default_attribute_name);
+  }
   MEM_delete(sock->runtime);
 }
 
diff --git a/source/blender/blenkernel/intern/subdiv_mesh.cc b/source/blender/blenkernel/intern/subdiv_mesh.cc
index 5a2af36e83c..44bdd6e6d06 100644
--- a/source/blender/blenkernel/intern/subdiv_mesh.cc
+++ b/source/blender/blenkernel/intern/subdiv_mesh.cc
@@ -5,6 +5,8 @@
  * \ingroup bke
  */
 
+#include <mutex>
+
 #include "atomic_ops.h"
 
 #include "DNA_key_types.h"
@@ -18,6 +20,7 @@
 #include "BKE_customdata.h"
 #include "BKE_key.h"
 #include "BKE_mesh.h"
+#include "BKE_mesh_mapping.h"
 #include "BKE_subdiv.h"
 #include "BKE_subdiv_eval.h"
 #include "BKE_subdiv_foreach.h"
@@ -25,6 +28,8 @@
 
 #include "MEM_guardedalloc.h"
 
+using blender::Span;
+
 /* -------------------------------------------------------------------- */
 /** \name Subdivision Context
  * \{ */
@@ -58,6 +63,11 @@ struct SubdivMeshContext {
   /* Per-subdivided vertex counter of averaged values. */
   int *accumulated_counters;
   bool have_displacement;
+
+  /* Lazily initialize a map from vertices to connected edges. */
+  std::mutex vert_to_edge_map_mutex;
+  int *vert_to_edge_buffer;
+  MeshElemMap *vert_to_edge_map;
 };
 
 static void subdiv_mesh_ctx_cache_uv_layers(SubdivMeshContext *ctx)
@@ -106,6 +116,8 @@ static void subdiv_mesh_prepare_accumulator(SubdivMeshContext *ctx, int num_vert
 static void subdiv_mesh_context_free(SubdivMeshContext *ctx)
 {
   MEM_SAFE_FREE(ctx->accumulated_counters);
+  MEM_SAFE_FREE(ctx->vert_to_edge_buffer);
+  MEM_SAFE_FREE(ctx->vert_to_edge_map);
 }
 
 /** \} */
@@ -779,7 +791,6 @@ static void subdiv_copy_edge_data(SubdivMeshContext *ctx,
   const int subdiv_edge_index = subdiv_edge - ctx->subdiv_edges;
   if (coarse_edge == nullptr) {
     subdiv_edge->crease = 0;
-    subdiv_edge->bweight = 0;
     subdiv_edge->flag = 0;
     if (!ctx->settings->use_optimal_display) {
       subdiv_edge->flag |= ME_EDGERENDER;
@@ -961,25 +972,30 @@ static void subdiv_mesh_vertex_loose(const SubdivForeachContext *foreach_context
 /* Get neighbor edges of the given one.
  * - neighbors[0] is an edge adjacent to edge->v1.
  * - neighbors[1] is an edge adjacent to edge->v2. */
-static void find_edge_neighbors(const Mesh *coarse_mesh,
-                                const MEdge *edge,
+static void find_edge_neighbors(const MEdge *coarse_edges,
+                                const MeshElemMap *vert_to_edge_map,
+                                const int edge_index,
                                 const MEdge *neighbors[2])
 {
-  const blender::Span<MEdge> coarse_edges = coarse_mesh->edges();
+  const MEdge *edge = &coarse_edges[edge_index];
   neighbors[0] = nullptr;
   neighbors[1] = nullptr;
   int neighbor_counters[2] = {0, 0};
-  for (int edge_index = 0; edge_index < coarse_mesh->totedge; edge_index++) {
-    const MEdge *current_edge = &coarse_edges[edge_index];
-    if (current_edge == edge) {
+  for (const int i : Span(vert_to_edge_map[edge->v1].indices, vert_to_edge_map[edge->v1].count)) {
+    if (i == edge_index) {
       continue;
     }
-    if (ELEM(edge->v1, current_edge->v1, current_edge->v2)) {
-      neighbors[0] = current_edge;
+    if (ELEM(edge->v1, coarse_edges[i].v1, coarse_edges[i].v2)) {
+      neighbors[0] = &coarse_edges[i];
       ++neighbor_counters[0];
     }
-    if (ELEM(edge->v2, current_edge->v1, current_edge->v2)) {
-      neighbors[1] = current_edge;
+  }
+  for (const int i : Span(vert_to_edge_map[edge->v2].indices, vert_to_edge_map[edge->v2].count)) {
+    if (i == edge_index) {
+      continue;
+    }
+    if (ELEM(edge->v2, coarse_edges[i].v1, coarse_edges[i].v2)) {
+      neighbors[1] = &coarse_edges[i];
       ++neighbor_counters[1];
     }
   }
@@ -994,12 +1010,11 @@ static void find_edge_neighbors(const Mesh *coarse_mesh,
   }
 }
 
-static void points_for_loose_edges_interpolation_get(const Mesh *coarse_mesh,
+static void points_for_loose_edges_interpolation_get(const MVert *coarse_mvert,
                                                      const MEdge *coarse_edge,
                                                      const MEdge *neighbors[2],
                                                      float points_r[4][3])
 {
-  const MVert *coarse_mvert = BKE_mesh_verts(coarse_mesh);
   /* Middle points corresponds to the edge. */
   copy_v3_v3(points_r[1], coarse_mvert[coarse_edge->v1].co);
   copy_v3_v3(points_r[2], coarse_mvert[coarse_edge->v2].co);
@@ -1031,24 +1046,26 @@ static void points_for_loose_edges_interpolation_get(const Mesh *coarse_mesh,
   }
 }
 
-void BKE_subdiv_mesh_interpolate_position_on_edge(const Mesh *coarse_mesh,
-                                                  const MEdge *coarse_edge,
+void BKE_subdiv_mesh_interpolate_position_on_edge(const MVert *coarse_verts,
+                                                  const MEdge *coarse_edges,
+                                                  const MeshElemMap *vert_to_edge_map,
+                                                  const int coarse_edge_index,
                                                   const bool is_simple,
                                                   const float u,
                                                   float pos_r[3])
 {
+  const MEdge *coarse_edge = &coarse_edges[coarse_edge_index];
   if (is_simple) {
-    const MVert *coarse_mvert = BKE_mesh_verts(coarse_mesh);
-    const MVert *vert_1 = &coarse_mvert[coarse_edge->v1];
-    const MVert *vert_2 = &coarse_mvert[coarse_edge->v2];
+    const MVert *vert_1 = &coarse_verts[coarse_edge->v1];
+    const MVert *vert_2 = &coarse_verts[coarse_edge->v2];
     interp_v3_v3v3(pos_r, vert_1->co, vert_2->co, u);
   }
   else {
     /* Find neighbors of the coarse edge. */
     const MEdge *neighbors[2];
-    find_edge_neighbors(coarse_mesh, coarse_edge, neighbors);
+    find_edge_neighbors(coarse_edges, vert_to_edge_map, coarse_edge_index, neighbors);
     float points[4][3];
-    points_for_loose_edges_interpolation_get(coarse_mesh, coarse_edge, neighbors, points);
+    points_for_loose_edges_interpolation_get(coarse_verts, coarse_edge, neighbors, points);
     float weights[4];
     key_curve_position_weights(u, weights, KEY_BSPLINE);
     interp_v3_v3v3v3v3(pos_r, points[0], points[1], points[2], points[3], weights);
@@ -1090,6 +1107,20 @@ static void subdiv_mesh_vertex_of_loose_edge(const SubdivForeachContext *foreach
   const Mesh *coarse_mesh = ctx->coarse_mesh;
   const MEdge *coarse_edge = &ctx->coarse_edges[coarse_edge_index];
   const bool is_simple = ctx->subdiv->settings.is_simple;
+
+  /* Lazily initialize a vertex to edge map to avoid quadratic runtime when subdividing loose
+   * edges. Do this here to avoid the cost in common cases when there are no loose edges at all. */
+  if (ctx->vert_to_edge_map == NULL) {
+    std::lock_guard lock{ctx->vert_to_edge_map_mutex};
+    if (ctx->vert_to_edge_map == NULL) {
+      BKE_mesh_vert_edge_map_create(&ctx->vert_to_edge_map,
+                                    &ctx->vert_to_edge_buffer,
+                                    ctx->coarse_edges,
+                                    coarse_mesh->totvert,
+                                    ctx->coarse_mesh->totedge);
+    }
+  }
+
   /* Interpolate custom data when not an end point.
    * This data has already been copied from the original vertex by #subdiv_mesh_vertex_loose. */
   if (!ELEM(u, 0.0, 1.0)) {
@@ -1097,13 +1128,15 @@ static void subdiv_mesh_vertex_of_loose_edge(const SubdivForeachContext *foreach
   }
   /* Interpolate coordinate. */
   MVert *subdiv_vertex = &ctx->subdiv_verts[subdiv_vertex_index];
-  BKE_subdiv_mesh_interpolate_position_on_edge(
-      coarse_mesh, coarse_edge, is_simple, u, subdiv_vertex->co);
+  BKE_subdiv_mesh_interpolate_position_on_edge(ctx->coarse_verts,
+                                               ctx->coarse_edges,
+                                               ctx->vert_to_edge_map,
+                                               coarse_edge_index,
+                                               is_simple,
+                                               u,
+                                               subdiv_vertex->co);
   /* Reset flags and such. */
   subdiv_vertex->flag = 0;
-  /* TODO(sergey): This matches old behavior, but we can as well interpolate
-   * it. Maybe even using vertex varying attributes. */
-  subdiv_vertex->bweight = 0.0f;
 }
 
 /** \} */
diff --git a/source/blender/blenkernel/intern/subsurf_ccg.c b/source/blender/blenkernel/intern/subsurf_ccg.c
index 88c260be9ba..0e5f9f30243 100644
--- a/source/blender/blenkernel/intern/subsurf_ccg.c
+++ b/source/blender/blenkernel/intern/subsurf_ccg.c
@@ -879,7 +879,7 @@ static void ccgDM_getFinalVertNo(DerivedMesh *dm, int vertNum, float r_no[3])
 BLI_INLINE void ccgDM_to_MVert(MVert *mv, const CCGKey *key, CCGElem *elem)
 {
   copy_v3_v3(mv->co, CCG_elem_co(key, elem));
-  mv->flag = mv->bweight = 0;
+  mv->flag = 0;
 }
 
 static void ccgDM_copyFinalVertArray(DerivedMesh *dm, MVert *mvert)
@@ -949,7 +949,7 @@ BLI_INLINE void ccgDM_to_MEdge(MEdge *med, const int v1, const int v2, const sho
 {
   med->v1 = v1;
   med->v2 = v2;
-  med->crease = med->bweight = 0;
+  med->crease = 0;
   med->flag = flag;
 }
 
diff --git a/source/blender/blenlib/BLI_bit_vector.hh b/source/blender/blenlib/BLI_bit_vector.hh
index 3cbd2483a31..2cec190f84a 100644
--- a/source/blender/blenlib/BLI_bit_vector.hh
+++ b/source/blender/blenlib/BLI_bit_vector.hh
@@ -196,7 +196,7 @@ class BitVector {
   /** Current size of the vector in bits. */
   int64_t size_in_bits_;
 
-  /** Number of bits that fit into the vector until a reallocation has to occure. */
+  /** Number of bits that fit into the vector until a reallocation has to occur. */
   int64_t capacity_in_bits_;
 
   /** Used for allocations when the inline buffer is too small. */
diff --git a/source/blender/blenlib/BLI_float3x3.hh b/source/blender/blenlib/BLI_float3x3.hh
index 6a9e7dd04f0..178973c155d 100644
--- a/source/blender/blenlib/BLI_float3x3.hh
+++ b/source/blender/blenlib/BLI_float3x3.hh
@@ -63,6 +63,15 @@ struct float3x3 {
     return result;
   }
 
+  static float3x3 from_scale(const float2 scale)
+  {
+    float3x3 result = zero();
+    result.values[0][0] = scale.x;
+    result.values[1][1] = scale.y;
+    result.values[2][2] = 1.0f;
+    return result;
+  }
+
   static float3x3 from_translation_rotation_scale(const float2 translation,
                                                   float rotation,
                                                   const float2 scale)
@@ -190,6 +199,13 @@ struct float3x3 {
     return result;
   }
 
+  float2 scale_2d() const
+  {
+    float2 scale;
+    mat3_to_size_2d(scale, values);
+    return scale;
+  }
+
   friend bool operator==(const float3x3 &a, const float3x3 &b)
   {
     return equals_m3m3(a.values, b.values);
diff --git a/source/blender/blenlib/BLI_math_matrix.h b/source/blender/blenlib/BLI_math_matrix.h
index 467e6db4805..19943614881 100644
--- a/source/blender/blenlib/BLI_math_matrix.h
+++ b/source/blender/blenlib/BLI_math_matrix.h
@@ -410,6 +410,8 @@ float mat4_to_xy_scale(const float mat[4][4]);
 void size_to_mat3(float R[3][3], const float size[3]);
 void size_to_mat4(float R[4][4], const float size[3]);
 
+/** Return 2D size assuming the given matrix is a 2D affine matrix. */
+void mat3_to_size_2d(float size[2], const float M[3][3]);
 void mat3_to_size(float size[3], const float M[3][3]);
 void mat4_to_size(float size[3], const float M[4][4]);
 
diff --git a/source/blender/blenlib/BLI_path_util.h b/source/blender/blenlib/BLI_path_util.h
index 06dd9ab0db9..75002f52d94 100644
--- a/source/blender/blenlib/BLI_path_util.h
+++ b/source/blender/blenlib/BLI_path_util.h
@@ -36,16 +36,6 @@ void BLI_setenv_if_new(const char *env, const char *val) ATTR_NONNULL(1);
 const char *BLI_getenv(const char *env) ATTR_NONNULL(1) ATTR_WARN_UNUSED_RESULT;
 
 /**
- * Returns in `string` the concatenation of `dir` and `file` (also with `relabase` on the
- * front if specified and `dir` begins with "//"). Normalizes all occurrences of path
- * separators, including ensuring there is exactly one between the copies of `dir` and `file`,
- * and between the copies of `relabase` and `dir`.
- *
- * \param relabase: Optional prefix to substitute for "//" on front of `dir`.
- * \param string: Area to return result.
- */
-void BLI_make_file_string(const char *relabase, char *string, const char *dir, const char *file);
-/**
  * Ensures that the parent directory of `name` exists.
  *
  * \return true on success (i.e. given path now exists on file-system), false otherwise.
diff --git a/source/blender/blenlib/intern/math_matrix.c b/source/blender/blenlib/intern/math_matrix.c
index e96b12033a9..221ae84e74d 100644
--- a/source/blender/blenlib/intern/math_matrix.c
+++ b/source/blender/blenlib/intern/math_matrix.c
@@ -2127,6 +2127,12 @@ void size_to_mat4(float R[4][4], const float size[3])
   R[3][3] = 1.0f;
 }
 
+void mat3_to_size_2d(float size[2], const float M[3][3])
+{
+  size[0] = len_v2(M[0]);
+  size[1] = len_v2(M[1]);
+}
+
 void mat3_to_size(float size[3], const float M[3][3])
 {
   size[0] = len_v3(M[0]);
diff --git a/source/blender/blenlib/intern/path_util.c b/source/blender/blenlib/intern/path_util.c
index 623dd572b11..1e95aa3b7b0 100644
--- a/source/blender/blenlib/intern/path_util.c
+++ b/source/blender/blenlib/intern/path_util.c
@@ -1204,87 +1204,6 @@ bool BLI_make_existing_file(const char *name)
   return BLI_dir_create_recursive(di);
 }
 
-void BLI_make_file_string(const char *relabase, char *string, const char *dir, const char *file)
-{
-  int sl;
-
-  if (string) {
-    /* ensure this is always set even if dir/file are NULL */
-    string[0] = '\0';
-
-    if (ELEM(NULL, dir, file)) {
-      return; /* We don't want any NULLs */
-    }
-  }
-  else {
-    return; /* string is NULL, probably shouldn't happen but return anyway */
-  }
-
-  /* Resolve relative references */
-  if (relabase && dir[0] == '/' && dir[1] == '/') {
-    char *lslash;
-
-    /* Get the file name, chop everything past the last slash (ie. the filename) */
-    strcpy(string, relabase);
-
-    lslash = (char *)BLI_path_slash_rfind(string);
-    if (lslash) {
-      *(lslash + 1) = 0;
-    }
-
-    dir += 2; /* Skip over the relative reference */
-  }
-#ifdef WIN32
-  else {
-    if (BLI_strnlen(dir, 3) >= 2 && dir[1] == ':') {
-      BLI_strncpy(string, dir, 3);
-      dir += 2;
-    }
-    else if (BLI_strnlen(dir, 3) >= 2 && BLI_path_is_unc(dir)) {
-      string[0] = 0;
-    }
-    else { /* no drive specified */
-           /* first option: get the drive from the relabase if it has one */
-      if (relabase && BLI_strnlen(relabase, 3) >= 2 && relabase[1] == ':') {
-        BLI_strncpy(string, relabase, 3);
-        string[2] = '\\';
-        string[3] = '\0';
-      }
-      else { /* we're out of luck here, guessing the first valid drive, usually c:\ */
-        BLI_windows_get_default_root_dir(string);
-      }
-
-      /* ignore leading slashes */
-      while (ELEM(*dir, '/', '\\')) {
-        dir++;
-      }
-    }
-  }
-#endif
-
-  strcat(string, dir);
-
-  /* Make sure string ends in one (and only one) slash */
-  /* first trim all slashes from the end of the string */
-  sl = strlen(string);
-  while ((sl > 0) && ELEM(string[sl - 1], '/', '\\')) {
-    string[sl - 1] = '\0';
-    sl--;
-  }
-  /* since we've now removed all slashes, put back one slash at the end. */
-  strcat(string, "/");
-
-  while (ELEM(*file, '/', '\\')) {
-    /* Trim slashes from the front of file */
-    file++;
-  }
-
-  strcat(string, file);
-
-  /* Push all slashes to the system preferred direction */
-  BLI_path_slash_native(string);
-}
-
 static bool path_extension_check_ex(const char *str,
                                     const size_t str_len,
                                     const char *ext,
diff --git a/source/blender/blenlib/tests/BLI_bit_vector_test.cc b/source/blender/blenlib/tests/BLI_bit_vector_test.cc
index c477b464f0c..210f2be012d 100644
--- a/source/blender/blenlib/tests/BLI_bit_vector_test.cc
+++ b/source/blender/blenlib/tests/BLI_bit_vector_test.cc
@@ -1,4 +1,4 @@
-/* Apache License, Version 2.0 */
+/* SPDX-License-Identifier: Apache-2.0 */
 
 #include "BLI_bit_vector.hh"
 #include "BLI_exception_safety_test_utils.hh"
diff --git a/source/blender/blenlib/tests/BLI_float3x3_test.cc b/source/blender/blenlib/tests/BLI_float3x3_test.cc
index d22993ee69e..cd823b6e368 100644
--- a/source/blender/blenlib/tests/BLI_float3x3_test.cc
+++ b/source/blender/blenlib/tests/BLI_float3x3_test.cc
@@ -34,6 +34,15 @@ TEST(float3x3, Rotation)
   EXPECT_FLOAT_EQ(result[1], 1.0f);
 }
 
+TEST(float3x3, Scale)
+{
+  float2 point(1.0f, 2.0f);
+  float3x3 transformation = float3x3::from_scale(float2(2.0f, 3.0f));
+  float2 result = transformation * point;
+  EXPECT_FLOAT_EQ(result[0], 2.0f);
+  EXPECT_FLOAT_EQ(result[1], 6.0f);
+}
+
 TEST(float3x3, TranslationRotationScale)
 {
   float2 point(1.0f, 2.0f);
@@ -116,4 +125,11 @@ TEST(float3x3, Origin)
   EXPECT_FLOAT_EQ(result[1], 3.0f);
 }
 
+TEST(float3x3, GetScale2D)
+{
+  float2 scale(2.0f, 3.0f);
+  float3x3 transformation = float3x3::from_scale(scale);
+  EXPECT_EQ(scale, transformation.scale_2d());
+}
+
 }  // namespace blender::tests
diff --git a/source/blender/blenloader/intern/readfile.c b/source/blender/blenloader/intern/readfile.c
index c5cf80fe635..bf2017b80f4 100644
--- a/source/blender/blenloader/intern/readfile.c
+++ b/source/blender/blenloader/intern/readfile.c
@@ -3065,9 +3065,13 @@ static BHead *read_data_into_datamap(FileData *fd, BHead *bhead, const char *all
      * With the code below we get the struct-name to help tracking down the leak.
      * This is kept disabled as the #malloc for the text always leaks memory. */
 #if 0
-    {
-      const short *sp = fd->filesdna->structs[bhead->SDNAnr];
-      allocname = fd->filesdna->types[sp[0]];
+    if (bhead->SDNAnr == 0) {
+      /* The data type here is unclear because #writedata sets SDNAnr to 0. */
+      allocname = "likely raw data";
+    }
+    else {
+      SDNA_Struct *sp = fd->filesdna->structs[bhead->SDNAnr];
+      allocname = fd->filesdna->types[sp->type];
       size_t allocname_size = strlen(allocname) + 1;
       char *allocname_buf = malloc(allocname_size);
       memcpy(allocname_buf, allocname, allocname_size);
diff --git a/source/blender/bmesh/intern/bmesh_mesh_convert.cc b/source/blender/bmesh/intern/bmesh_mesh_convert.cc
index ccd82865178..94440916603 100644
--- a/source/blender/bmesh/intern/bmesh_mesh_convert.cc
+++ b/source/blender/bmesh/intern/bmesh_mesh_convert.cc
@@ -126,17 +126,6 @@ void BM_mesh_cd_flag_apply(BMesh *bm, const char cd_flag)
   BLI_assert(bm->edata.totlayer == 0 || bm->edata.pool != nullptr);
   BLI_assert(bm->pdata.totlayer == 0 || bm->pdata.pool != nullptr);
 
-  if (cd_flag & ME_CDFLAG_VERT_BWEIGHT) {
-    if (!CustomData_has_layer(&bm->vdata, CD_BWEIGHT)) {
-      BM_data_layer_add(bm, &bm->vdata, CD_BWEIGHT);
-    }
-  }
-  else {
-    if (CustomData_has_layer(&bm->vdata, CD_BWEIGHT)) {
-      BM_data_layer_free(bm, &bm->vdata, CD_BWEIGHT);
-    }
-  }
-
   if (cd_flag & ME_CDFLAG_VERT_CREASE) {
     if (!CustomData_has_layer(&bm->vdata, CD_CREASE)) {
       BM_data_layer_add(bm, &bm->vdata, CD_CREASE);
@@ -148,17 +137,6 @@ void BM_mesh_cd_flag_apply(BMesh *bm, const char cd_flag)
     }
   }
 
-  if (cd_flag & ME_CDFLAG_EDGE_BWEIGHT) {
-    if (!CustomData_has_layer(&bm->edata, CD_BWEIGHT)) {
-      BM_data_layer_add(bm, &bm->edata, CD_BWEIGHT);
-    }
-  }
-  else {
-    if (CustomData_has_layer(&bm->edata, CD_BWEIGHT)) {
-      BM_data_layer_free(bm, &bm->edata, CD_BWEIGHT);
-    }
-  }
-
   if (cd_flag & ME_CDFLAG_EDGE_CREASE) {
     if (!CustomData_has_layer(&bm->edata, CD_CREASE)) {
       BM_data_layer_add(bm, &bm->edata, CD_CREASE);
@@ -174,15 +152,9 @@ void BM_mesh_cd_flag_apply(BMesh *bm, const char cd_flag)
 char BM_mesh_cd_flag_from_bmesh(BMesh *bm)
 {
   char cd_flag = 0;
-  if (CustomData_has_layer(&bm->vdata, CD_BWEIGHT)) {
-    cd_flag |= ME_CDFLAG_VERT_BWEIGHT;
-  }
   if (CustomData_has_layer(&bm->vdata, CD_CREASE)) {
     cd_flag |= ME_CDFLAG_VERT_CREASE;
   }
-  if (CustomData_has_layer(&bm->edata, CD_BWEIGHT)) {
-    cd_flag |= ME_CDFLAG_EDGE_BWEIGHT;
-  }
   if (CustomData_has_layer(&bm->edata, CD_CREASE)) {
     cd_flag |= ME_CDFLAG_EDGE_CREASE;
   }
@@ -342,12 +314,6 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar
 
   /* Only copy these values over if the source mesh is flagged to be using them.
    * Even if `bm` has these layers, they may have been added from another mesh, when `!is_new`. */
-  const int cd_vert_bweight_offset = (me->cd_flag & ME_CDFLAG_VERT_BWEIGHT) ?
-                                         CustomData_get_offset(&bm->vdata, CD_BWEIGHT) :
-                                         -1;
-  const int cd_edge_bweight_offset = (me->cd_flag & ME_CDFLAG_EDGE_BWEIGHT) ?
-                                         CustomData_get_offset(&bm->edata, CD_BWEIGHT) :
-                                         -1;
   const int cd_edge_crease_offset = (me->cd_flag & ME_CDFLAG_EDGE_CREASE) ?
                                         CustomData_get_offset(&bm->edata, CD_CREASE) :
                                         -1;
@@ -391,10 +357,6 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar
     /* Copy Custom Data */
     CustomData_to_bmesh_block(&me->vdata, &bm->vdata, i, &v->head.data, true);
 
-    if (cd_vert_bweight_offset != -1) {
-      BM_ELEM_CD_SET_FLOAT(v, cd_vert_bweight_offset, (float)mvert[i].bweight / 255.0f);
-    }
-
     /* Set shape key original index. */
     if (cd_shape_keyindex_offset != -1) {
       BM_ELEM_CD_SET_INT(v, cd_shape_keyindex_offset, i);
@@ -433,9 +395,6 @@ void BM_mesh_bm_from_me(BMesh *bm, const Mesh *me, const struct BMeshFromMeshPar
     /* Copy Custom Data */
     CustomData_to_bmesh_block(&me->edata, &bm->edata, i, &e->head.data, true);
 
-    if (cd_edge_bweight_offset != -1) {
-      BM_ELEM_CD_SET_FLOAT(e, cd_edge_bweight_offset, (float)medge[i].bweight / 255.0f);
-    }
     if (cd_edge_crease_offset != -1) {
       BM_ELEM_CD_SET_FLOAT(e, cd_edge_crease_offset, (float)medge[i].crease / 255.0f);
     }
@@ -990,8 +949,6 @@ void BM_mesh_bm_to_me(Main *bmain, BMesh *bm, Mesh *me, const struct BMeshToMesh
   BMIter iter;
   int i, j;
 
-  const int cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT);
-  const int cd_edge_bweight_offset = CustomData_get_offset(&bm->edata, CD_BWEIGHT);
   const int cd_edge_crease_offset = CustomData_get_offset(&bm->edata, CD_CREASE);
   const int cd_shape_keyindex_offset = CustomData_get_offset(&bm->vdata, CD_SHAPE_KEYINDEX);
 
@@ -1073,10 +1030,6 @@ void BM_mesh_bm_to_me(Main *bmain, BMesh *bm, Mesh *me, const struct BMeshToMesh
     /* Copy over custom-data. */
     CustomData_from_bmesh_block(&bm->vdata, &me->vdata, v->head.data, i);
 
-    if (cd_vert_bweight_offset != -1) {
-      mvert[i].bweight = BM_ELEM_CD_GET_FLOAT_AS_UCHAR(v, cd_vert_bweight_offset);
-    }
-
     i++;
 
     BM_CHECK_ELEMENT(v);
@@ -1103,9 +1056,6 @@ void BM_mesh_bm_to_me(Main *bmain, BMesh *bm, Mesh *me, const struct BMeshToMesh
     if (cd_edge_crease_offset != -1) {
       medge[i].crease = BM_ELEM_CD_GET_FLOAT_AS_UCHAR(e, cd_edge_crease_offset);
     }
-    if (cd_edge_bweight_offset != -1) {
-      medge[i].bweight = BM_ELEM_CD_GET_FLOAT_AS_UCHAR(e, cd_edge_bweight_offset);
-    }
 
     i++;
     BM_CHECK_ELEMENT(e);
@@ -1312,8 +1262,6 @@ void BM_mesh_bm_to_me_for_eval(BMesh *bm, Mesh *me, const CustomData_MeshMasks *
   MLoop *mloop = loops.data();
   unsigned int i, j;
 
-  const int cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT);
-  const int cd_edge_bweight_offset = CustomData_get_offset(&bm->edata, CD_BWEIGHT);
   const int cd_edge_crease_offset = CustomData_get_offset(&bm->edata, CD_CREASE);
 
   bool need_hide_vert = false;
@@ -1339,14 +1287,6 @@ void BM_mesh_bm_to_me_for_eval(BMesh *bm, Mesh *me, const CustomData_MeshMasks *
       need_hide_vert = true;
     }
 
-    if (cd_vert_bweight_offset != -1) {
-      mv->bweight = BM_ELEM_CD_GET_FLOAT_AS_UCHAR(eve, cd_vert_bweight_offset);
-    }
-
-    if (cd_vert_bweight_offset != -1) {
-      mv->bweight = BM_ELEM_CD_GET_FLOAT_AS_UCHAR(eve, cd_vert_bweight_offset);
-    }
-
     CustomData_from_bmesh_block(&bm->vdata, &me->vdata, eve->head.data, i);
   }
   bm->elem_index_dirty &= ~BM_VERT;
@@ -1375,9 +1315,6 @@ void BM_mesh_bm_to_me_for_eval(BMesh *bm, Mesh *me, const CustomData_MeshMasks *
     if (cd_edge_crease_offset != -1) {
       med->crease = BM_ELEM_CD_GET_FLOAT_AS_UCHAR(eed, cd_edge_crease_offset);
     }
-    if (cd_edge_bweight_offset != -1) {
-      med->bweight = BM_ELEM_CD_GET_FLOAT_AS_UCHAR(eed, cd_edge_bweight_offset);
-    }
 
     CustomData_from_bmesh_block(&bm->edata, &me->edata, eed->head.data, i);
   }
diff --git a/source/blender/compositor/nodes/COM_ScaleNode.cc b/source/blender/compositor/nodes/COM_ScaleNode.cc
index 4813e49cd11..1d613a030d7 100644
--- a/source/blender/compositor/nodes/COM_ScaleNode.cc
+++ b/source/blender/compositor/nodes/COM_ScaleNode.cc
@@ -25,7 +25,7 @@ void ScaleNode::convert_to_operations(NodeConverter &converter,
   NodeOutput *output_socket = this->get_output_socket(0);
 
   switch (bnode->custom1) {
-    case CMP_SCALE_RELATIVE: {
+    case CMP_NODE_SCALE_RELATIVE: {
       ScaleRelativeOperation *operation = new ScaleRelativeOperation();
       converter.add_operation(operation);
 
@@ -39,7 +39,7 @@ void ScaleNode::convert_to_operations(NodeConverter &converter,
 
       break;
     }
-    case CMP_SCALE_SCENEPERCENT: {
+    case CMP_NODE_SCALE_RENDER_PERCENT: {
       SetValueOperation *scale_factor_operation = new SetValueOperation();
       scale_factor_operation->set_value(context.get_render_percentage_as_factor());
       converter.add_operation(scale_factor_operation);
@@ -59,13 +59,14 @@ void ScaleNode::convert_to_operations(NodeConverter &converter,
 
       break;
     }
-    case CMP_SCALE_RENDERPERCENT: {
+    case CMP_NODE_SCALE_RENDER_SIZE: {
       const RenderData *rd = context.get_render_data();
       const float render_size_factor = context.get_render_percentage_as_factor();
       ScaleFixedSizeOperation *operation = new ScaleFixedSizeOperation();
       /* framing options */
-      operation->set_is_aspect((bnode->custom2 & CMP_SCALE_RENDERSIZE_FRAME_ASPECT) != 0);
-      operation->set_is_crop((bnode->custom2 & CMP_SCALE_RENDERSIZE_FRAME_CROP) != 0);
+      operation->set_is_aspect(
+          ELEM(bnode->custom2, CMP_NODE_SCALE_RENDER_SIZE_FIT, CMP_NODE_SCALE_RENDER_SIZE_CROP));
+      operation->set_is_crop(bnode->custom2 == CMP_NODE_SCALE_RENDER_SIZE_CROP);
       operation->set_offset(bnode->custom3, bnode->custom4);
       operation->set_new_width(rd->xsch * render_size_factor);
       operation->set_new_height(rd->ysch * render_size_factor);
@@ -79,7 +80,7 @@ void ScaleNode::convert_to_operations(NodeConverter &converter,
 
       break;
     }
-    case CMP_SCALE_ABSOLUTE: {
+    case CMP_NODE_SCALE_ABSOLUTE: {
       /* TODO: what is the use of this one.... perhaps some issues when the ui was updated... */
       ScaleAbsoluteOperation *operation = new ScaleAbsoluteOperation();
       converter.add_operation(operation);
diff --git a/source/blender/compositor/operations/COM_SMAAOperation.cc b/source/blender/compositor/operations/COM_SMAAOperation.cc
index 11e51e81ef0..261426b31e2 100644
--- a/source/blender/compositor/operations/COM_SMAAOperation.cc
+++ b/source/blender/compositor/operations/COM_SMAAOperation.cc
@@ -12,7 +12,7 @@ extern "C" {
 namespace blender::compositor {
 
 /*
- * An implementation of Enhanced Subpixel Morphological Antialiasing (SMAA)
+ * An implementation of Enhanced Sub-pixel Morphological Anti-aliasing (SMAA)
  *
  * The algorithm was proposed by:
  *   Jorge Jimenez, Jose I. Echevarria, Tiago Sousa, Diego Gutierrez
diff --git a/source/blender/compositor/realtime_compositor/intern/compile_state.cc b/source/blender/compositor/realtime_compositor/intern/compile_state.cc
index 97c1e47e86e..5fa2fc9d544 100644
--- a/source/blender/compositor/realtime_compositor/intern/compile_state.cc
+++ b/source/blender/compositor/realtime_compositor/intern/compile_state.cc
@@ -149,6 +149,11 @@ Domain CompileState::compute_shader_node_domain(DNode node)
       continue;
     }
 
+    /* An input that skips realization can't be a domain input. */
+    if (input_descriptor.skip_realization) {
+      continue;
+    }
+
     /* Notice that the lower the domain priority value is, the higher the priority is, hence the
      * less than comparison. */
     if (input_descriptor.domain_priority < current_domain_priority) {
diff --git a/source/blender/compositor/realtime_compositor/intern/operation.cc b/source/blender/compositor/realtime_compositor/intern/operation.cc
index fb02807d729..832196cc5ef 100644
--- a/source/blender/compositor/realtime_compositor/intern/operation.cc
+++ b/source/blender/compositor/realtime_compositor/intern/operation.cc
@@ -66,6 +66,11 @@ Domain Operation::compute_domain()
       continue;
     }
 
+    /* An input that skips realization can't be a domain input. */
+    if (descriptor.skip_realization) {
+      continue;
+    }
+
     /* Notice that the lower the domain priority value is, the higher the priority is, hence the
      * less than comparison. */
     if (descriptor.domain_priority < current_domain_priority) {
diff --git a/source/blender/compositor/realtime_compositor/intern/utilities.cc b/source/blender/compositor/realtime_compositor/intern/utilities.cc
index 2e1baec98a8..1a5823b8441 100644
--- a/source/blender/compositor/realtime_compositor/intern/utilities.cc
+++ b/source/blender/compositor/realtime_compositor/intern/utilities.cc
@@ -116,6 +116,7 @@ InputDescriptor input_descriptor_from_input_socket(const bNodeSocket *socket)
   }
   const SocketDeclarationPtr &socket_declaration = node_declaration->inputs()[socket->index()];
   input_descriptor.domain_priority = socket_declaration->compositor_domain_priority();
+  input_descriptor.skip_realization = socket_declaration->compositor_skip_realization();
   input_descriptor.expects_single_value = socket_declaration->compositor_expects_single_value();
   return input_descriptor;
 }
diff --git a/source/blender/draw/engines/eevee/eevee_lightcache.c b/source/blender/draw/engines/eevee/eevee_lightcache.c
index 7f722ff1764..614ea0b0892 100644
--- a/source/blender/draw/engines/eevee/eevee_lightcache.c
+++ b/source/blender/draw/engines/eevee/eevee_lightcache.c
@@ -849,7 +849,7 @@ static void eevee_lightbake_delete_resources(EEVEE_LightBake *lbake)
     DRW_opengl_context_enable();
   }
 
-  /* XXX Free the resources contained in the viewlayer data
+  /* XXX: Free the resources contained in the view-layer data
    * to be able to free the context before deleting the depsgraph. */
   if (lbake->sldata) {
     EEVEE_view_layer_data_free(lbake->sldata);
diff --git a/source/blender/draw/engines/eevee/eevee_private.h b/source/blender/draw/engines/eevee/eevee_private.h
index 8d47d80987c..8c6d96254ae 100644
--- a/source/blender/draw/engines/eevee/eevee_private.h
+++ b/source/blender/draw/engines/eevee/eevee_private.h
@@ -1015,7 +1015,7 @@ typedef struct EEVEE_PrivateData {
   struct GHash *material_hash;
   float background_alpha; /* TODO: find a better place for this. */
   bool disable_ligthprobes;
-  /* Chosen lightcache: can come from Lookdev or the viewlayer. */
+  /** Chosen light-cache: can come from Lookdev or the view-layer. */
   struct LightCache *light_cache;
   /* For planar probes */
   float planar_texel_size[2];
diff --git a/source/blender/draw/engines/gpencil/gpencil_draw_data.c b/source/blender/draw/engines/gpencil/gpencil_draw_data.c
index 65ddb80ad55..e54ac99a888 100644
--- a/source/blender/draw/engines/gpencil/gpencil_draw_data.c
+++ b/source/blender/draw/engines/gpencil/gpencil_draw_data.c
@@ -460,7 +460,7 @@ GPENCIL_ViewLayerData *GPENCIL_view_layer_data_ensure(void)
   GPENCIL_ViewLayerData **vldata = (GPENCIL_ViewLayerData **)DRW_view_layer_engine_data_ensure(
       &draw_engine_gpencil_type, gpencil_view_layer_data_free);
 
-  /* NOTE(&fclem): Putting this stuff in viewlayer means it is shared by all viewports.
+  /* NOTE(@fclem): Putting this stuff in view-layer means it is shared by all viewports.
    * For now it is ok, but in the future, it could become a problem if we implement
    * the caching system. */
   if (*vldata == NULL) {
diff --git a/source/blender/draw/engines/gpencil/gpencil_engine.c b/source/blender/draw/engines/gpencil/gpencil_engine.c
index 4f520e61936..42c396a0d43 100644
--- a/source/blender/draw/engines/gpencil/gpencil_engine.c
+++ b/source/blender/draw/engines/gpencil/gpencil_engine.c
@@ -799,7 +799,7 @@ static void gpencil_draw_mask(GPENCIL_Data *vedata, GPENCIL_tObject *ob, GPENCIL
     }
 
     GPENCIL_tLayer *mask_layer = gpencil_layer_cache_get(ob, i);
-    /* When filtering by viewlayer, the mask could be null and must be ignored. */
+    /* When filtering by view-layer, the mask could be null and must be ignored. */
     if (mask_layer == NULL) {
       continue;
     }
diff --git a/source/blender/draw/intern/draw_cache_impl_subdivision.cc b/source/blender/draw/intern/draw_cache_impl_subdivision.cc
index 51fbc5a3027..ab935809f96 100644
--- a/source/blender/draw/intern/draw_cache_impl_subdivision.cc
+++ b/source/blender/draw/intern/draw_cache_impl_subdivision.cc
@@ -10,6 +10,7 @@
 #include "BKE_attribute.hh"
 #include "BKE_editmesh.h"
 #include "BKE_mesh.h"
+#include "BKE_mesh_mapping.h"
 #include "BKE_modifier.h"
 #include "BKE_object.h"
 #include "BKE_scene.h"
@@ -2155,7 +2156,17 @@ void DRW_subdivide_loose_geom(DRWSubdivCache *subdiv_cache, MeshBufferCache *cac
   int subd_vert_offset = 0;
 
   /* Subdivide each loose coarse edge. */
+  const Span<MVert> coarse_verts = coarse_mesh->verts();
   const Span<MEdge> coarse_edges = coarse_mesh->edges();
+
+  int *vert_to_edge_buffer;
+  MeshElemMap *vert_to_edge_map;
+  BKE_mesh_vert_edge_map_create(&vert_to_edge_map,
+                                &vert_to_edge_buffer,
+                                coarse_edges.data(),
+                                coarse_mesh->totvert,
+                                coarse_edges.size());
+
   for (int i = 0; i < coarse_loose_edge_len; i++) {
     const int coarse_edge_index = cache->loose_geom.edges[i];
     const MEdge *coarse_edge = &coarse_edges[cache->loose_geom.edges[i]];
@@ -2169,8 +2180,13 @@ void DRW_subdivide_loose_geom(DRWSubdivCache *subdiv_cache, MeshBufferCache *cac
       DRWSubdivLooseVertex &subd_v1 = loose_subd_verts[subd_vert_offset];
       subd_v1.coarse_vertex_index = (i == 0) ? coarse_edge->v1 : -1u;
       const float u1 = i * inv_resolution_1;
-      BKE_subdiv_mesh_interpolate_position_on_edge(
-          coarse_mesh, coarse_edge, is_simple, u1, subd_v1.co);
+      BKE_subdiv_mesh_interpolate_position_on_edge(coarse_verts.data(),
+                                                   coarse_edges.data(),
+                                                   vert_to_edge_map,
+                                                   coarse_edge_index,
+                                                   is_simple,
+                                                   u1,
+                                                   subd_v1.co);
 
       subd_edge.loose_subdiv_v1_index = subd_vert_offset++;
 
@@ -2178,15 +2194,22 @@ void DRW_subdivide_loose_geom(DRWSubdivCache *subdiv_cache, MeshBufferCache *cac
       DRWSubdivLooseVertex &subd_v2 = loose_subd_verts[subd_vert_offset];
       subd_v2.coarse_vertex_index = ((i + 1) == resolution - 1) ? coarse_edge->v2 : -1u;
       const float u2 = (i + 1) * inv_resolution_1;
-      BKE_subdiv_mesh_interpolate_position_on_edge(
-          coarse_mesh, coarse_edge, is_simple, u2, subd_v2.co);
+      BKE_subdiv_mesh_interpolate_position_on_edge(coarse_verts.data(),
+                                                   coarse_edges.data(),
+                                                   vert_to_edge_map,
+                                                   coarse_edge_index,
+                                                   is_simple,
+                                                   u2,
+                                                   subd_v2.co);
 
       subd_edge.loose_subdiv_v2_index = subd_vert_offset++;
     }
   }
 
+  MEM_freeN(vert_to_edge_buffer);
+  MEM_freeN(vert_to_edge_map);
+
   /* Copy the remaining loose_verts. */
-  const Span<MVert> coarse_verts = coarse_mesh->verts();
   for (int i = 0; i < coarse_loose_vert_len; i++) {
     const int coarse_vertex_index = cache->loose_geom.verts[i];
     const MVert &coarse_vertex = coarse_verts[coarse_vertex_index];
diff --git a/source/blender/draw/intern/draw_command.hh b/source/blender/draw/intern/draw_command.hh
index b9117580d91..46a9199a267 100644
--- a/source/blender/draw/intern/draw_command.hh
+++ b/source/blender/draw/intern/draw_command.hh
@@ -531,4 +531,4 @@ class DrawMultiBuf {
 
 /** \} */
 
-};  // namespace blender::draw::command
\ No newline at end of file
+};  // namespace blender::draw::command
diff --git a/source/blender/draw/intern/draw_manager.hh b/source/blender/draw/intern/draw_manager.hh
index aff56b0307b..fbd3d28d3f4 100644
--- a/source/blender/draw/intern/draw_manager.hh
+++ b/source/blender/draw/intern/draw_manager.hh
@@ -98,7 +98,6 @@ class Manager {
   /** Number of object attribute recorded. */
   uint attribute_len_ = 0;
 
-  Object *object = nullptr;
   Object *object_active = nullptr;
 
  public:
diff --git a/source/blender/draw/intern/draw_resource.hh b/source/blender/draw/intern/draw_resource.hh
index 22ee43592a9..2df38e32ed2 100644
--- a/source/blender/draw/intern/draw_resource.hh
+++ b/source/blender/draw/intern/draw_resource.hh
@@ -85,10 +85,11 @@ inline void ObjectInfos::sync(const blender::draw::ObjectRef ref, bool is_active
   if (ref.dupli_object == nullptr) {
     /* TODO(fclem): this is rather costly to do at draw time. Maybe we can
      * put it in ob->runtime and make depsgraph ensure it is up to date. */
-    random = BLI_hash_int_2d(BLI_hash_string(ref.object->id.name + 2), 0) * (1.0f / 0xFFFFFFFF);
+    random = BLI_hash_int_2d(BLI_hash_string(ref.object->id.name + 2), 0) *
+             (1.0f / (float)0xFFFFFFFF);
   }
   else {
-    random = ref.dupli_object->random_id * (1.0f / 0xFFFFFFFF);
+    random = ref.dupli_object->random_id * (1.0f / (float)0xFFFFFFFF);
   }
   /* Default values. Set if needed. */
   random = 0.0f;
diff --git a/source/blender/draw/intern/draw_view.cc b/source/blender/draw/intern/draw_view.cc
index 326e8629e52..cb0e1370c28 100644
--- a/source/blender/draw/intern/draw_view.cc
+++ b/source/blender/draw/intern/draw_view.cc
@@ -260,13 +260,15 @@ void View::update_view_vectors()
   }
 
   /**
-   * If ortho : view_vecs[0] is the near-bottom-left corner of the frustum and
-   *            view_vecs[1] is the vector going from the near-bottom-left corner to
-   *            the far-top-right corner.
-   * If Persp : view_vecs[0].xy and view_vecs[1].xy are respectively the bottom-left corner
-   *            when Z = 1, and top-left corner if Z = 1.
-   *            view_vecs[0].z the near clip distance and view_vecs[1].z is the (signed)
-   *            distance from the near plane to the far clip plane.
+   * - If orthographic:
+   *   `view_vecs[0]` is the near-bottom-left corner of the frustum and
+   *   `view_vecs[1]` is the vector going from the near-bottom-left corner to
+   *   the far-top-right corner.
+   * - If perspective:
+   *   `view_vecs[0].xy` and `view_vecs[1].xy` are respectively the bottom-left corner
+   *   when `Z = 1`, and top-left corner if `Z = 1`.
+   *   `view_vecs[0].z` the near clip distance and `view_vecs[1].z` is the (signed)
+   *   distance from the near plane to the far clip plane.
    */
   copy_v3_v3(data_.viewvecs[0], view_vecs[0]);
 
diff --git a/source/blender/draw/intern/shaders/draw_resource_finalize_comp.glsl b/source/blender/draw/intern/shaders/draw_resource_finalize_comp.glsl
index d834435e54e..511d4e49651 100644
--- a/source/blender/draw/intern/shaders/draw_resource_finalize_comp.glsl
+++ b/source/blender/draw/intern/shaders/draw_resource_finalize_comp.glsl
@@ -61,4 +61,4 @@ void main()
   vec3 size_inv = safe_rcp(size);
   infos_buf[resource_id].orco_add = -loc * size_inv;
   infos_buf[resource_id].orco_mul = size_inv;
-}
\ No newline at end of file
+}
diff --git a/source/blender/draw/intern/shaders/draw_visibility_comp.glsl b/source/blender/draw/intern/shaders/draw_visibility_comp.glsl
index 7ec58c8f919..86add2d1fe2 100644
--- a/source/blender/draw/intern/shaders/draw_visibility_comp.glsl
+++ b/source/blender/draw/intern/shaders/draw_visibility_comp.glsl
@@ -43,4 +43,4 @@ void main()
       mask_visibility_bit();
     }
   }
-}
\ No newline at end of file
+}
diff --git a/source/blender/editors/interface/interface_drag.cc b/source/blender/editors/interface/interface_drag.cc
index 0c7c3a238ec..4bf2dac4151 100644
--- a/source/blender/editors/interface/interface_drag.cc
+++ b/source/blender/editors/interface/interface_drag.cc
@@ -37,7 +37,7 @@ void UI_but_drag_set_asset(uiBut *but,
 {
   wmDragAsset *asset_drag = WM_drag_create_asset_data(asset, metadata, path, import_type);
 
-  /* FIXME: This is temporary evil solution to get scene/viewlayer/etc in the copy callback of the
+  /* FIXME: This is temporary evil solution to get scene/view-layer/etc in the copy callback of the
    * #wmDropBox.
    * TODO: Handle link/append in operator called at the end of the drop process, and NOT in its
    * copy callback.
diff --git a/source/blender/editors/mesh/editmesh_mask_extract.c b/source/blender/editors/mesh/editmesh_mask_extract.c
index 6a080e78086..a4d41400bae 100644
--- a/source/blender/editors/mesh/editmesh_mask_extract.c
+++ b/source/blender/editors/mesh/editmesh_mask_extract.c
@@ -204,7 +204,7 @@ static int geometry_extract_apply(bContext *C,
     local_view_bits = v3d->local_view_uuid;
   }
   Object *new_ob = ED_object_add_type(C, OB_MESH, NULL, ob->loc, ob->rot, false, local_view_bits);
-  BKE_mesh_nomain_to_mesh(new_mesh, new_ob->data, new_ob, &CD_MASK_EVERYTHING, true);
+  BKE_mesh_nomain_to_mesh(new_mesh, new_ob->data, new_ob);
 
   /* Remove the Face Sets as they need to be recreated when entering Sculpt Mode in the new object.
    * TODO(pablodobarro): In the future we can try to preserve them from the original mesh. */
@@ -548,7 +548,7 @@ static int paint_mask_slice_exec(bContext *C, wmOperator *op)
     /* Remove the mask from the new object so it can be sculpted directly after slicing. */
     CustomData_free_layers(&new_ob_mesh->vdata, CD_PAINT_MASK, new_ob_mesh->totvert);
 
-    BKE_mesh_nomain_to_mesh(new_ob_mesh, new_ob->data, new_ob, &CD_MASK_MESH, true);
+    BKE_mesh_nomain_to_mesh(new_ob_mesh, new_ob->data, new_ob);
     BKE_mesh_copy_parameters_for_eval(new_ob->data, mesh);
     WM_event_add_notifier(C, NC_OBJECT | ND_MODIFIER, new_ob);
     BKE_mesh_batch_cache_dirty_tag(new_ob->data, BKE_MESH_BATCH_DIRTY_ALL);
@@ -557,7 +557,7 @@ static int paint_mask_slice_exec(bContext *C, wmOperator *op)
     WM_event_add_notifier(C, NC_GEOM | ND_DATA, new_ob->data);
   }
 
-  BKE_mesh_nomain_to_mesh(new_mesh, ob->data, ob, &CD_MASK_MESH, true);
+  BKE_mesh_nomain_to_mesh(new_mesh, ob->data, ob);
 
   if (ob->mode == OB_MODE_SCULPT) {
     SculptSession *ss = ob->sculpt;
diff --git a/source/blender/editors/mesh/editmesh_path.c b/source/blender/editors/mesh/editmesh_path.c
index 70f550a661e..ad51651faaa 100644
--- a/source/blender/editors/mesh/editmesh_path.c
+++ b/source/blender/editors/mesh/editmesh_path.c
@@ -21,6 +21,7 @@
 #include "BLI_math.h"
 
 #include "BKE_context.h"
+#include "BKE_customdata.h"
 #include "BKE_editmesh.h"
 #include "BKE_layer.h"
 #include "BKE_report.h"
@@ -348,7 +349,9 @@ static void edgetag_ensure_cd_flag(Mesh *me, const char edge_mode)
       BM_mesh_cd_flag_ensure(bm, me, ME_CDFLAG_EDGE_CREASE);
       break;
     case EDGE_MODE_TAG_BEVEL:
-      BM_mesh_cd_flag_ensure(bm, me, ME_CDFLAG_EDGE_BWEIGHT);
+      if (!CustomData_has_layer(&bm->edata, CD_BWEIGHT)) {
+        BM_data_layer_add(bm, &bm->edata, CD_BWEIGHT);
+      }
       break;
 #ifdef WITH_FREESTYLE
     case EDGE_MODE_TAG_FREESTYLE:
diff --git a/source/blender/editors/mesh/mesh_data.cc b/source/blender/editors/mesh/mesh_data.cc
index 4ee518b5662..e362501d86c 100644
--- a/source/blender/editors/mesh/mesh_data.cc
+++ b/source/blender/editors/mesh/mesh_data.cc
@@ -626,6 +626,28 @@ static int mesh_customdata_clear_exec__internal(bContext *C, char htype, int typ
   return OPERATOR_CANCELLED;
 }
 
+static int mesh_customdata_add_exec__internal(bContext *C, char htype, int type)
+{
+  Mesh *mesh = ED_mesh_context(C);
+
+  int tot;
+  CustomData *data = mesh_customdata_get_type(mesh, htype, &tot);
+
+  BLI_assert(CustomData_layertype_is_singleton(type) == true);
+
+  if (mesh->edit_mesh) {
+    BM_data_layer_add(mesh->edit_mesh->bm, data, type);
+  }
+  else {
+    CustomData_add_layer(data, type, CD_SET_DEFAULT, NULL, tot);
+  }
+
+  DEG_id_tag_update(&mesh->id, 0);
+  WM_event_add_notifier(C, NC_GEOM | ND_DATA, mesh);
+
+  return CustomData_has_layer(data, type) ? OPERATOR_FINISHED : OPERATOR_CANCELLED;
+}
+
 /* Clear Mask */
 static bool mesh_customdata_mask_clear_poll(bContext *C)
 {
@@ -848,6 +870,126 @@ void MESH_OT_customdata_custom_splitnormals_clear(wmOperatorType *ot)
   ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
 }
 
+/* Vertex bevel weight. */
+
+static int mesh_customdata_bevel_weight_vertex_state(bContext *C)
+{
+  const Object *object = ED_object_context(C);
+
+  if (object && object->type == OB_MESH) {
+    const Mesh *mesh = static_cast<Mesh *>(object->data);
+    if (!ID_IS_LINKED(mesh)) {
+      const CustomData *data = GET_CD_DATA(mesh, vdata);
+      return CustomData_has_layer(data, CD_BWEIGHT);
+    }
+  }
+  return -1;
+}
+
+static bool mesh_customdata_bevel_weight_vertex_add_poll(bContext *C)
+{
+  return mesh_customdata_bevel_weight_vertex_state(C) == 0;
+}
+
+static int mesh_customdata_bevel_weight_vertex_add_exec(bContext *C, wmOperator *UNUSED(op))
+{
+  return mesh_customdata_add_exec__internal(C, BM_VERT, CD_BWEIGHT);
+}
+
+void MESH_OT_customdata_bevel_weight_vertex_add(wmOperatorType *ot)
+{
+  ot->name = "Add Vertex Bevel Weight";
+  ot->idname = "MESH_OT_customdata_bevel_weight_vertex_add";
+  ot->description = "Add a vertex bevel weight layer";
+
+  ot->exec = mesh_customdata_bevel_weight_vertex_add_exec;
+  ot->poll = mesh_customdata_bevel_weight_vertex_add_poll;
+
+  ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+}
+
+static bool mesh_customdata_bevel_weight_vertex_clear_poll(bContext *C)
+{
+  return (mesh_customdata_bevel_weight_vertex_state(C) == 1);
+}
+
+static int mesh_customdata_bevel_weight_vertex_clear_exec(bContext *C, wmOperator *UNUSED(op))
+{
+  return mesh_customdata_clear_exec__internal(C, BM_VERT, CD_BWEIGHT);
+}
+
+void MESH_OT_customdata_bevel_weight_vertex_clear(wmOperatorType *ot)
+{
+  ot->name = "Clear Vertex Bevel Weight";
+  ot->idname = "MESH_OT_customdata_bevel_weight_vertex_clear";
+  ot->description = "Clear the vertex bevel weight layer";
+
+  ot->exec = mesh_customdata_bevel_weight_vertex_clear_exec;
+  ot->poll = mesh_customdata_bevel_weight_vertex_clear_poll;
+
+  ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+}
+
+/* Edge bevel weight. */
+
+static int mesh_customdata_bevel_weight_edge_state(bContext *C)
+{
+  const Object *ob = ED_object_context(C);
+
+  if (ob && ob->type == OB_MESH) {
+    const Mesh *mesh = static_cast<Mesh *>(ob->data);
+    if (!ID_IS_LINKED(mesh)) {
+      const CustomData *data = GET_CD_DATA(mesh, edata);
+      return CustomData_has_layer(data, CD_BWEIGHT);
+    }
+  }
+  return -1;
+}
+
+static bool mesh_customdata_bevel_weight_edge_add_poll(bContext *C)
+{
+  return mesh_customdata_bevel_weight_edge_state(C) == 0;
+}
+
+static int mesh_customdata_bevel_weight_edge_add_exec(bContext *C, wmOperator *UNUSED(op))
+{
+  return mesh_customdata_add_exec__internal(C, BM_EDGE, CD_BWEIGHT);
+}
+
+void MESH_OT_customdata_bevel_weight_edge_add(wmOperatorType *ot)
+{
+  ot->name = "Add Edge Bevel Weight";
+  ot->idname = "MESH_OT_customdata_bevel_weight_edge_add";
+  ot->description = "Add an edge bevel weight layer";
+
+  ot->exec = mesh_customdata_bevel_weight_edge_add_exec;
+  ot->poll = mesh_customdata_bevel_weight_edge_add_poll;
+
+  ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+}
+
+static bool mesh_customdata_bevel_weight_edge_clear_poll(bContext *C)
+{
+  return mesh_customdata_bevel_weight_edge_state(C) == 1;
+}
+
+static int mesh_customdata_bevel_weight_edge_clear_exec(bContext *C, wmOperator *UNUSED(op))
+{
+  return mesh_customdata_clear_exec__internal(C, BM_EDGE, CD_BWEIGHT);
+}
+
+void MESH_OT_customdata_bevel_weight_edge_clear(wmOperatorType *ot)
+{
+  ot->name = "Clear Edge Bevel Weight";
+  ot->idname = "MESH_OT_customdata_bevel_weight_edge_clear";
+  ot->description = "Clear the edge bevel weight layer";
+
+  ot->exec = mesh_customdata_bevel_weight_edge_clear_exec;
+  ot->poll = mesh_customdata_bevel_weight_edge_clear_poll;
+
+  ot->flag = OPTYPE_REGISTER | OPTYPE_UNDO;
+}
+
 /************************** Add Geometry Layers *************************/
 
 void ED_mesh_update(Mesh *mesh, bContext *C, bool calc_edges, bool calc_edges_loose)
diff --git a/source/blender/editors/mesh/mesh_intern.h b/source/blender/editors/mesh/mesh_intern.h
index 4cf6f3d0eaa..75f63ed5d6f 100644
--- a/source/blender/editors/mesh/mesh_intern.h
+++ b/source/blender/editors/mesh/mesh_intern.h
@@ -315,6 +315,10 @@ void MESH_OT_customdata_skin_add(struct wmOperatorType *ot);
 void MESH_OT_customdata_skin_clear(struct wmOperatorType *ot);
 void MESH_OT_customdata_custom_splitnormals_add(struct wmOperatorType *ot);
 void MESH_OT_customdata_custom_splitnormals_clear(struct wmOperatorType *ot);
+void MESH_OT_customdata_bevel_weight_vertex_add(struct wmOperatorType *ot);
+void MESH_OT_customdata_bevel_weight_vertex_clear(struct wmOperatorType *ot);
+void MESH_OT_customdata_bevel_weight_edge_add(struct wmOperatorType *ot);
+void MESH_OT_customdata_bevel_weight_edge_clear(struct wmOperatorType *ot);
 
 #ifdef __cplusplus
 }
diff --git a/source/blender/editors/mesh/mesh_ops.c b/source/blender/editors/mesh/mesh_ops.c
index b9e78740e3c..01c92a59fc9 100644
--- a/source/blender/editors/mesh/mesh_ops.c
+++ b/source/blender/editors/mesh/mesh_ops.c
@@ -139,6 +139,10 @@ void ED_operatortypes_mesh(void)
   WM_operatortype_append(MESH_OT_customdata_skin_clear);
   WM_operatortype_append(MESH_OT_customdata_custom_splitnormals_add);
   WM_operatortype_append(MESH_OT_customdata_custom_splitnormals_clear);
+  WM_operatortype_append(MESH_OT_customdata_bevel_weight_vertex_add);
+  WM_operatortype_append(MESH_OT_customdata_bevel_weight_vertex_clear);
+  WM_operatortype_append(MESH_OT_customdata_bevel_weight_edge_add);
+  WM_operatortype_append(MESH_OT_customdata_bevel_weight_edge_clear);
 
   WM_operatortype_append(MESH_OT_edgering_select);
   WM_operatortype_append(MESH_OT_loopcut);
diff --git a/source/blender/editors/mesh/meshtools.cc b/source/blender/editors/mesh/meshtools.cc
index 9d1ea499e42..108fa210075 100644
--- a/source/blender/editors/mesh/meshtools.cc
+++ b/source/blender/editors/mesh/meshtools.cc
@@ -253,7 +253,7 @@ static void join_mesh_single(Depsgraph *depsgraph,
     CustomData_merge(&me->pdata, pdata, CD_MASK_MESH.pmask, CD_SET_DEFAULT, totpoly);
     CustomData_copy_data_named(&me->pdata, pdata, 0, *polyofs, me->totpoly);
 
-    /* Apply matmap. In case we dont have material indices yet, create them if more than one
+    /* Apply matmap. In case we don't have material indices yet, create them if more than one
      * material is the result of joining. */
     int *material_indices = static_cast<int *>(
         CustomData_get_layer_named(pdata, CD_PROP_INT32, "material_index"));
diff --git a/source/blender/editors/object/object_add.cc b/source/blender/editors/object/object_add.cc
index 272e6bbc70d..ee2bb551c40 100644
--- a/source/blender/editors/object/object_add.cc
+++ b/source/blender/editors/object/object_add.cc
@@ -3151,7 +3151,7 @@ static int object_convert_exec(bContext *C, wmOperator *op)
       BKE_mesh_edges_set_draw_render(me_eval);
       BKE_object_material_from_eval_data(bmain, newob, &me_eval->id);
       Mesh *new_mesh = (Mesh *)newob->data;
-      BKE_mesh_nomain_to_mesh(me_eval, new_mesh, newob, &CD_MASK_MESH, true);
+      BKE_mesh_nomain_to_mesh(me_eval, new_mesh, newob);
 
       if (do_merge_customdata) {
         BKE_mesh_merge_customdata_for_apply_modifier(new_mesh);
diff --git a/source/blender/editors/object/object_modifier.cc b/source/blender/editors/object/object_modifier.cc
index 97f88ce433c..61caa56cf7c 100644
--- a/source/blender/editors/object/object_modifier.cc
+++ b/source/blender/editors/object/object_modifier.cc
@@ -764,7 +764,7 @@ static bool modifier_apply_obdata(
 
       Main *bmain = DEG_get_bmain(depsgraph);
       BKE_object_material_from_eval_data(bmain, ob, &mesh_applied->id);
-      BKE_mesh_nomain_to_mesh(mesh_applied, me, ob, &CD_MASK_MESH, true);
+      BKE_mesh_nomain_to_mesh(mesh_applied, me, ob);
 
       /* Anonymous attributes shouldn't be available on the applied geometry. */
       me->attributes_for_write().remove_anonymous();
diff --git a/source/blender/editors/object/object_remesh.cc b/source/blender/editors/object/object_remesh.cc
index 09489c50e9d..a6b51048209 100644
--- a/source/blender/editors/object/object_remesh.cc
+++ b/source/blender/editors/object/object_remesh.cc
@@ -179,7 +179,7 @@ static int voxel_remesh_exec(bContext *C, wmOperator *op)
     BKE_remesh_reproject_vertex_paint(new_mesh, mesh);
   }
 
-  BKE_mesh_nomain_to_mesh(new_mesh, mesh, ob, &CD_MASK_MESH, true);
+  BKE_mesh_nomain_to_mesh(new_mesh, mesh, ob);
 
   if (smooth_normals) {
     BKE_mesh_smooth_flag_set(static_cast<Mesh *>(ob->data), true);
@@ -905,7 +905,7 @@ static void quadriflow_start_job(void *customdata, short *stop, short *do_update
     BKE_mesh_remesh_reproject_paint_mask(new_mesh, mesh);
   }
 
-  BKE_mesh_nomain_to_mesh(new_mesh, mesh, ob, &CD_MASK_MESH, true);
+  BKE_mesh_nomain_to_mesh(new_mesh, mesh, ob);
 
   if (qj->smooth_normals) {
     BKE_mesh_smooth_flag_set(static_cast<Mesh *>(ob->data), true);
diff --git a/source/blender/editors/object/object_vgroup.cc b/source/blender/editors/object/object_vgroup.cc
index d2cb7ad4b43..1d1263494c7 100644
--- a/source/blender/editors/object/object_vgroup.cc
+++ b/source/blender/editors/object/object_vgroup.cc
@@ -277,7 +277,7 @@ void ED_vgroup_parray_mirror_sync(Object *ob,
   }
 
   int flip_map_len;
-  const int *flip_map = BKE_object_defgroup_flip_map(ob, &flip_map_len, true);
+  const int *flip_map = BKE_object_defgroup_flip_map(ob, true, &flip_map_len);
 
   for (int i_src = 0; i_src < dvert_tot; i_src++) {
     if (dvert_array[i_src] != nullptr) {
@@ -506,7 +506,7 @@ static void mesh_defvert_mirror_update_internal(Object *ob,
   if (def_nr == -1) {
     /* All vgroups, add groups where needed. */
     int flip_map_len;
-    int *flip_map = BKE_object_defgroup_flip_map(ob, &flip_map_len, true);
+    int *flip_map = BKE_object_defgroup_flip_map_unlocked(ob, true, &flip_map_len);
     BKE_defvert_sync_mapped(dvert_dst, dvert_src, flip_map, flip_map_len, true);
     MEM_freeN(flip_map);
   }
@@ -2392,8 +2392,8 @@ void ED_vgroup_mirror(Object *ob,
   }
 
   if (flip_vgroups) {
-    flip_map = all_vgroups ? BKE_object_defgroup_flip_map(ob, &flip_map_len, false) :
-                             BKE_object_defgroup_flip_map_single(ob, &flip_map_len, false, def_nr);
+    flip_map = all_vgroups ? BKE_object_defgroup_flip_map(ob, false, &flip_map_len) :
+                             BKE_object_defgroup_flip_map_single(ob, false, def_nr, &flip_map_len);
 
     BLI_assert(flip_map != nullptr);
 
diff --git a/source/blender/editors/render/render_preview.cc b/source/blender/editors/render/render_preview.cc
index 4c4a4e052ba..c97d5f3cbc8 100644
--- a/source/blender/editors/render/render_preview.cc
+++ b/source/blender/editors/render/render_preview.cc
@@ -1305,41 +1305,33 @@ static void shader_preview_free(void *customdata)
 
 static ImBuf *icon_preview_imbuf_from_brush(Brush *brush)
 {
-  static const int flags = IB_rect | IB_multilayer | IB_metadata;
+  if (!brush->icon_imbuf && (brush->flag & BRUSH_CUSTOM_ICON) && brush->icon_filepath[0]) {
+    const int flags = IB_rect | IB_multilayer | IB_metadata;
 
-  char filepath[FILE_MAX];
-  const char *folder;
+    /* First use the path directly to try and load the file. */
+    char filepath[FILE_MAX];
 
-  if (!(brush->icon_imbuf)) {
-    if (brush->flag & BRUSH_CUSTOM_ICON) {
+    BLI_strncpy(filepath, brush->icon_filepath, sizeof(brush->icon_filepath));
+    BLI_path_abs(filepath, ID_BLEND_PATH_FROM_GLOBAL(&brush->id));
 
-      if (brush->icon_filepath[0]) {
-        /* First use the path directly to try and load the file. */
+    /* Use default color-spaces for brushes. */
+    brush->icon_imbuf = IMB_loadiffname(filepath, flags, nullptr);
 
-        BLI_strncpy(filepath, brush->icon_filepath, sizeof(brush->icon_filepath));
-        BLI_path_abs(filepath, ID_BLEND_PATH_FROM_GLOBAL(&brush->id));
+    /* Otherwise lets try to find it in other directories. */
+    if (!(brush->icon_imbuf)) {
+      const char *brushicons_dir = BKE_appdir_folder_id(BLENDER_DATAFILES, "brushicons");
+      /* Expected to be found, but don't crash if it's not. */
+      if (brushicons_dir) {
+        BLI_join_dirfile(filepath, sizeof(filepath), brushicons_dir, brush->icon_filepath);
 
-        /* Use default color-spaces for brushes. */
+        /* Use default color spaces. */
         brush->icon_imbuf = IMB_loadiffname(filepath, flags, nullptr);
-
-        /* otherwise lets try to find it in other directories */
-        if (!(brush->icon_imbuf)) {
-          folder = BKE_appdir_folder_id(BLENDER_DATAFILES, "brushicons");
-
-          BLI_make_file_string(
-              BKE_main_blendfile_path_from_global(), filepath, folder, brush->icon_filepath);
-
-          if (filepath[0]) {
-            /* Use default color spaces. */
-            brush->icon_imbuf = IMB_loadiffname(filepath, flags, nullptr);
-          }
-        }
-
-        if (brush->icon_imbuf) {
-          BKE_icon_changed(BKE_icon_id_ensure(&brush->id));
-        }
       }
     }
+
+    if (brush->icon_imbuf) {
+      BKE_icon_changed(BKE_icon_id_ensure(&brush->id));
+    }
   }
 
   if (!(brush->icon_imbuf)) {
diff --git a/source/blender/editors/sculpt_paint/curves_sculpt_density.cc b/source/blender/editors/sculpt_paint/curves_sculpt_density.cc
index c33ee5e0727..a37eb4bb560 100644
--- a/source/blender/editors/sculpt_paint/curves_sculpt_density.cc
+++ b/source/blender/editors/sculpt_paint/curves_sculpt_density.cc
@@ -137,11 +137,10 @@ struct DensityAddOperationExecutor {
     /* Find UV map. */
     VArraySpan<float2> surface_uv_map;
     if (curves_id_orig_->surface_uv_map != nullptr) {
-      surface_uv_map = surface_orig_->attributes()
-                           .lookup<float2>(curves_id_orig_->surface_uv_map, ATTR_DOMAIN_CORNER);
-      surface_uv_map_eval_ = surface_eval_->attributes()
-                                 .lookup<float2>(curves_id_orig_->surface_uv_map,
-                                                 ATTR_DOMAIN_CORNER);
+      surface_uv_map = surface_orig_->attributes().lookup<float2>(curves_id_orig_->surface_uv_map,
+                                                                  ATTR_DOMAIN_CORNER);
+      surface_uv_map_eval_ = surface_eval_->attributes().lookup<float2>(
+          curves_id_orig_->surface_uv_map, ATTR_DOMAIN_CORNER);
     }
     if (surface_uv_map.is_empty()) {
       report_missing_uv_map_on_original_surface(stroke_extension.reports);
diff --git a/source/blender/editors/sculpt_paint/paint_mask.c b/source/blender/editors/sculpt_paint/paint_mask.c
index 332a0830081..0ea45f83336 100644
--- a/source/blender/editors/sculpt_paint/paint_mask.c
+++ b/source/blender/editors/sculpt_paint/paint_mask.c
@@ -1315,8 +1315,7 @@ static void sculpt_gesture_apply_trim(SculptGestureContext *sgcontext)
                                             }),
                                             sculpt_mesh);
   BM_mesh_free(bm);
-  BKE_mesh_nomain_to_mesh(
-      result, sgcontext->vc.obact->data, sgcontext->vc.obact, &CD_MASK_MESH, true);
+  BKE_mesh_nomain_to_mesh(result, sgcontext->vc.obact->data, sgcontext->vc.obact);
 }
 
 static void sculpt_gesture_trim_begin(bContext *C, SculptGestureContext *sgcontext)
diff --git a/source/blender/editors/space_node/link_drag_search.cc b/source/blender/editors/space_node/link_drag_search.cc
index 21d5d8d7d26..a4be0a65230 100644
--- a/source/blender/editors/space_node/link_drag_search.cc
+++ b/source/blender/editors/space_node/link_drag_search.cc
@@ -227,7 +227,7 @@ static void link_drag_search_exec_fn(bContext *C, void *arg1, void *arg2)
   ED_node_tree_propagate_change(C, &bmain, snode.edittree);
 
   /* Start translation operator with the new node. */
-  wmOperatorType *ot = WM_operatortype_find("TRANSFORM_OT_translate", true);
+  wmOperatorType *ot = WM_operatortype_find("NODE_OT_translate_attach", true);
   BLI_assert(ot);
   PointerRNA ptr;
   WM_operator_properties_create_ptr(&ptr, ot);
diff --git a/source/blender/editors/space_node/node_relationships.cc b/source/blender/editors/space_node/node_relationships.cc
index 40f5d20d06d..7dbaa8ccd6d 100644
--- a/source/blender/editors/space_node/node_relationships.cc
+++ b/source/blender/editors/space_node/node_relationships.cc
@@ -1727,35 +1727,34 @@ static int node_attach_invoke(bContext *C, wmOperator *UNUSED(op), const wmEvent
   SpaceNode &snode = *CTX_wm_space_node(C);
   bNodeTree &ntree = *snode.edittree;
   bNode *frame = node_find_frame_to_attach(region, ntree, event->mval);
-  if (frame == nullptr) {
-    return OPERATOR_CANCELLED;
-  }
 
-  LISTBASE_FOREACH_BACKWARD (bNode *, node, &ntree.nodes) {
-    if (node->flag & NODE_SELECT) {
-      if (node->parent == nullptr) {
-        /* disallow moving a parent into its child */
-        if (nodeAttachNodeCheck(frame, node) == false) {
-          /* attach all unparented nodes */
-          nodeAttachNode(node, frame);
-        }
-      }
-      else {
-        /* attach nodes which share parent with the frame */
-        bNode *parent;
-        for (parent = frame->parent; parent; parent = parent->parent) {
-          if (parent == node->parent) {
-            break;
-          }
-        }
-
-        if (parent) {
+  if (frame) {
+    LISTBASE_FOREACH_BACKWARD (bNode *, node, &ntree.nodes) {
+      if (node->flag & NODE_SELECT) {
+        if (node->parent == nullptr) {
           /* disallow moving a parent into its child */
           if (nodeAttachNodeCheck(frame, node) == false) {
-            nodeDetachNode(node);
+            /* attach all unparented nodes */
             nodeAttachNode(node, frame);
           }
         }
+        else {
+          /* attach nodes which share parent with the frame */
+          bNode *parent;
+          for (parent = frame->parent; parent; parent = parent->parent) {
+            if (parent == node->parent) {
+              break;
+            }
+          }
+
+          if (parent) {
+            /* disallow moving a parent into its child */
+            if (nodeAttachNodeCheck(frame, node) == false) {
+              nodeDetachNode(node);
+              nodeAttachNode(node, frame);
+            }
+          }
+        }
       }
     }
   }
diff --git a/source/blender/editors/space_node/node_select.cc b/source/blender/editors/space_node/node_select.cc
index 82aaa2c3cc6..1f1ce9c0c2b 100644
--- a/source/blender/editors/space_node/node_select.cc
+++ b/source/blender/editors/space_node/node_select.cc
@@ -14,7 +14,6 @@
 #include "BLI_lasso_2d.h"
 #include "BLI_listbase.h"
 #include "BLI_rect.h"
-#include "BLI_set.hh"
 #include "BLI_string.h"
 #include "BLI_string_search.h"
 #include "BLI_string_utf8.h"
@@ -645,29 +644,28 @@ static bool node_mouse_select(bContext *C,
     }
   }
 
-  if (!(changed || found)) {
-    return false;
-  }
+  /* update node order */
+  if (changed || found) {
+    bool active_texture_changed = false;
+    bool viewer_node_changed = false;
+    if ((node != nullptr) && (node_was_selected == false || params->select_passthrough == false)) {
+      viewer_node_changed = (node->flag & NODE_DO_OUTPUT) == 0 && node->type == GEO_NODE_VIEWER;
+      ED_node_set_active(&bmain, &snode, snode.edittree, node, &active_texture_changed);
+    }
+    else if (node != nullptr && node->type == GEO_NODE_VIEWER) {
+      ED_spreadsheet_context_paths_set_geometry_node(&bmain, &snode, node);
+    }
+    ED_node_set_active_viewer_key(&snode);
+    node_sort(*snode.edittree);
+    if ((active_texture_changed && has_workbench_in_texture_color(wm, scene, ob)) ||
+        viewer_node_changed) {
+      DEG_id_tag_update(&snode.edittree->id, ID_RECALC_COPY_ON_WRITE);
+    }
 
-  bool active_texture_changed = false;
-  bool viewer_node_changed = false;
-  if ((node != nullptr) && (node_was_selected == false || params->select_passthrough == false)) {
-    viewer_node_changed = (node->flag & NODE_DO_OUTPUT) == 0 && node->type == GEO_NODE_VIEWER;
-    ED_node_set_active(&bmain, &snode, snode.edittree, node, &active_texture_changed);
-  }
-  else if (node != nullptr && node->type == GEO_NODE_VIEWER) {
-    ED_spreadsheet_context_paths_set_geometry_node(&bmain, &snode, node);
-  }
-  ED_node_set_active_viewer_key(&snode);
-  node_sort(*snode.edittree);
-  if ((active_texture_changed && has_workbench_in_texture_color(wm, scene, ob)) ||
-      viewer_node_changed) {
-    DEG_id_tag_update(&snode.edittree->id, ID_RECALC_COPY_ON_WRITE);
+    WM_event_add_notifier(C, NC_NODE | NA_SELECTED, nullptr);
   }
 
-  WM_event_add_notifier(C, NC_NODE | NA_SELECTED, nullptr);
-
-  return true;
+  return changed || found;
 }
 
 static int node_select_exec(bContext *C, wmOperator *op)
diff --git a/source/blender/editors/space_outliner/outliner_draw.cc b/source/blender/editors/space_outliner/outliner_draw.cc
index d8c94d8ee6c..4259d3572be 100644
--- a/source/blender/editors/space_outliner/outliner_draw.cc
+++ b/source/blender/editors/space_outliner/outliner_draw.cc
@@ -285,7 +285,7 @@ static void outliner_object_set_flag_recursive_fn(bContext *C,
       }
       else {
         Base *base_iter = BKE_view_layer_base_find(view_layer, ob_iter);
-        /* Child can be in a collection excluded from viewlayer. */
+        /* Child can be in a collection excluded from view-layer. */
         if (base_iter == nullptr) {
           continue;
         }
diff --git a/source/blender/editors/space_view3d/view3d_buttons.c b/source/blender/editors/space_view3d/view3d_buttons.c
index 5a5747bdf84..fe7e3a797c9 100644
--- a/source/blender/editors/space_view3d/view3d_buttons.c
+++ b/source/blender/editors/space_view3d/view3d_buttons.c
@@ -995,7 +995,9 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
       if (apply_vcos || median->bv_weight || median->v_crease || median->skin[0] ||
           median->skin[1]) {
         if (median->bv_weight) {
-          BM_mesh_cd_flag_ensure(bm, me, ME_CDFLAG_VERT_BWEIGHT);
+          if (!CustomData_has_layer(&bm->vdata, CD_BWEIGHT)) {
+            BM_data_layer_add(bm, &bm->vdata, CD_BWEIGHT);
+          }
           cd_vert_bweight_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT);
           BLI_assert(cd_vert_bweight_offset != -1);
 
@@ -1061,7 +1063,9 @@ static void v3d_editvertex_buts(uiLayout *layout, View3D *v3d, Object *ob, float
 
       if (median->be_weight || median->e_crease) {
         if (median->be_weight) {
-          BM_mesh_cd_flag_ensure(bm, me, ME_CDFLAG_EDGE_BWEIGHT);
+          if (!CustomData_has_layer(&bm->edata, CD_BWEIGHT)) {
+            BM_data_layer_add(bm, &bm->edata, CD_BWEIGHT);
+          }
           cd_edge_bweight_offset = CustomData_get_offset(&bm->edata, CD_BWEIGHT);
           BLI_assert(cd_edge_bweight_offset != -1);
 
diff --git a/source/blender/editors/transform/transform_convert_mesh_edge.c b/source/blender/editors/transform/transform_convert_mesh_edge.c
index becf3c7ce5a..b1627e62f8c 100644
--- a/source/blender/editors/transform/transform_convert_mesh_edge.c
+++ b/source/blender/editors/transform/transform_convert_mesh_edge.c
@@ -67,7 +67,9 @@ static void createTransEdge(bContext *UNUSED(C), TransInfo *t)
 
     /* create data we need */
     if (t->mode == TFM_BWEIGHT) {
-      BM_mesh_cd_flag_ensure(em->bm, BKE_mesh_from_object(tc->obedit), ME_CDFLAG_EDGE_BWEIGHT);
+      if (!CustomData_has_layer(&em->bm->edata, CD_BWEIGHT)) {
+        BM_data_layer_add(em->bm, &em->bm->edata, CD_BWEIGHT);
+      }
       cd_edge_float_offset = CustomData_get_offset(&em->bm->edata, CD_BWEIGHT);
     }
     else { /* if (t->mode == TFM_EDGE_CREASE) { */
diff --git a/source/blender/editors/transform/transform_convert_mesh_vert_cdata.c b/source/blender/editors/transform/transform_convert_mesh_vert_cdata.c
index f05688f3325..39705f87a0d 100644
--- a/source/blender/editors/transform/transform_convert_mesh_vert_cdata.c
+++ b/source/blender/editors/transform/transform_convert_mesh_vert_cdata.c
@@ -84,7 +84,9 @@ static void createTransMeshVertCData(bContext *UNUSED(C), TransInfo *t)
 
     int cd_offset = -1;
     if (t->mode == TFM_BWEIGHT) {
-      BM_mesh_cd_flag_ensure(bm, me, ME_CDFLAG_VERT_BWEIGHT);
+      if (!CustomData_has_layer(&bm->vdata, CD_BWEIGHT)) {
+        BM_data_layer_add(bm, &bm->vdata, CD_BWEIGHT);
+      }
       cd_offset = CustomData_get_offset(&bm->vdata, CD_BWEIGHT);
     }
     else {
diff --git a/source/blender/geometry/intern/mesh_merge_by_distance.cc b/source/blender/geometry/intern/mesh_merge_by_distance.cc
index 831241aa274..17318c277aa 100644
--- a/source/blender/geometry/intern/mesh_merge_by_distance.cc
+++ b/source/blender/geometry/intern/mesh_merge_by_distance.cc
@@ -1233,7 +1233,6 @@ static void customdata_weld(
   float no[3] = {0.0f, 0.0f, 0.0f};
 #endif
   int crease = 0;
-  int bweight = 0;
   short flag = 0;
 
   /* interpolates a layer at a time */
@@ -1267,7 +1266,6 @@ static void customdata_weld(
           no[1] += mv_src_no[1];
           no[2] += mv_src_no[2];
 #endif
-          bweight += mv_src->bweight;
           flag |= mv_src->flag;
         }
       }
@@ -1275,7 +1273,6 @@ static void customdata_weld(
         for (j = 0; j < count; j++) {
           MEdge *me_src = &((MEdge *)src_data)[src_indices[j]];
           crease += me_src->crease;
-          bweight += me_src->bweight;
           flag |= me_src->flag;
         }
       }
@@ -1312,8 +1309,6 @@ static void customdata_weld(
     if (type == CD_MVERT) {
       MVert *mv = &((MVert *)layer_dst->data)[dest_index];
       mul_v3_fl(co, fac);
-      bweight *= fac;
-      CLAMP_MAX(bweight, 255);
 
       copy_v3_v3(mv->co, co);
 #ifdef USE_WELD_NORMALS
@@ -1325,17 +1320,13 @@ static void customdata_weld(
 #endif
 
       mv->flag = (char)flag;
-      mv->bweight = (char)bweight;
     }
     else if (type == CD_MEDGE) {
       MEdge *me = &((MEdge *)layer_dst->data)[dest_index];
       crease *= fac;
-      bweight *= fac;
       CLAMP_MAX(crease, 255);
-      CLAMP_MAX(bweight, 255);
 
       me->crease = (char)crease;
-      me->bweight = (char)bweight;
       me->flag = flag;
     }
     else if (CustomData_layer_has_interp(dest, dest_i)) {
diff --git a/source/blender/gpu/CMakeLists.txt b/source/blender/gpu/CMakeLists.txt
index 47d4feb7ec9..8b38c22ae28 100644
--- a/source/blender/gpu/CMakeLists.txt
+++ b/source/blender/gpu/CMakeLists.txt
@@ -326,6 +326,7 @@ set(GLSL_SRC
 
   shaders/compositor/compositor_alpha_crop.glsl
   shaders/compositor/compositor_bilateral_blur.glsl
+  shaders/compositor/compositor_blur.glsl
   shaders/compositor/compositor_bokeh_image.glsl
   shaders/compositor/compositor_box_mask.glsl
   shaders/compositor/compositor_convert.glsl
@@ -345,8 +346,11 @@ set(GLSL_SRC
   shaders/compositor/compositor_screen_lens_distortion.glsl
   shaders/compositor/compositor_set_alpha.glsl
   shaders/compositor/compositor_split_viewer.glsl
+  shaders/compositor/compositor_symmetric_blur.glsl
+  shaders/compositor/compositor_symmetric_separable_blur.glsl
 
   shaders/compositor/library/gpu_shader_compositor_alpha_over.glsl
+  shaders/compositor/library/gpu_shader_compositor_blur_common.glsl
   shaders/compositor/library/gpu_shader_compositor_bright_contrast.glsl
   shaders/compositor/library/gpu_shader_compositor_channel_matte.glsl
   shaders/compositor/library/gpu_shader_compositor_chroma_matte.glsl
@@ -601,6 +605,7 @@ set(SRC_SHADER_CREATE_INFOS
 
   shaders/compositor/infos/compositor_alpha_crop_info.hh
   shaders/compositor/infos/compositor_bilateral_blur_info.hh
+  shaders/compositor/infos/compositor_blur_info.hh
   shaders/compositor/infos/compositor_bokeh_image_info.hh
   shaders/compositor/infos/compositor_box_mask_info.hh
   shaders/compositor/infos/compositor_convert_info.hh
@@ -620,6 +625,8 @@ set(SRC_SHADER_CREATE_INFOS
   shaders/compositor/infos/compositor_screen_lens_distortion_info.hh
   shaders/compositor/infos/compositor_set_alpha_info.hh
   shaders/compositor/infos/compositor_split_viewer_info.hh
+  shaders/compositor/infos/compositor_symmetric_blur_info.hh
+  shaders/compositor/infos/compositor_symmetric_separable_blur_info.hh
 )
 
 set(SRC_SHADER_CREATE_INFOS_MTL
diff --git a/source/blender/gpu/metal/kernels/gpu_shader_fullscreen_blit_info.hh b/source/blender/gpu/metal/kernels/gpu_shader_fullscreen_blit_info.hh
index 6af67ad44d2..469e488c176 100644
--- a/source/blender/gpu/metal/kernels/gpu_shader_fullscreen_blit_info.hh
+++ b/source/blender/gpu/metal/kernels/gpu_shader_fullscreen_blit_info.hh
@@ -20,4 +20,4 @@ GPU_SHADER_CREATE_INFO(fullscreen_blit)
     .sampler(0, ImageType::FLOAT_2D, "imageTexture", Frequency::PASS)
     .vertex_source("gpu_shader_fullscreen_blit_vert.glsl")
     .fragment_source("gpu_shader_fullscreen_blit_frag.glsl")
-    .do_static_compilation(true);
\ No newline at end of file
+    .do_static_compilation(true);
diff --git a/source/blender/gpu/metal/mtl_index_buffer.hh b/source/blender/gpu/metal/mtl_index_buffer.hh
index fde26b16927..702aa7f27d6 100644
--- a/source/blender/gpu/metal/mtl_index_buffer.hh
+++ b/source/blender/gpu/metal/mtl_index_buffer.hh
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 /** \file
  * \ingroup gpu
diff --git a/source/blender/gpu/metal/mtl_index_buffer.mm b/source/blender/gpu/metal/mtl_index_buffer.mm
index 99795d7bbd9..2195ab7538d 100644
--- a/source/blender/gpu/metal/mtl_index_buffer.mm
+++ b/source/blender/gpu/metal/mtl_index_buffer.mm
@@ -1,7 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 
 /** \file
  * \ingroup gpu
  */
+
 #include "mtl_index_buffer.hh"
 #include "mtl_context.hh"
 #include "mtl_debug.hh"
diff --git a/source/blender/gpu/metal/mtl_primitive.hh b/source/blender/gpu/metal/mtl_primitive.hh
index 5aa7a533b95..b32854a04bf 100644
--- a/source/blender/gpu/metal/mtl_primitive.hh
+++ b/source/blender/gpu/metal/mtl_primitive.hh
@@ -97,4 +97,4 @@ static inline bool mtl_vertex_count_fits_primitive_type(uint32_t vertex_count,
   return false;
 }
 
-}  // namespace blender::gpu
\ No newline at end of file
+}  // namespace blender::gpu
diff --git a/source/blender/gpu/shaders/common/gpu_shader_common_curves.glsl b/source/blender/gpu/shaders/common/gpu_shader_common_curves.glsl
index db8e114ec7a..e68c173c055 100644
--- a/source/blender/gpu/shaders/common/gpu_shader_common_curves.glsl
+++ b/source/blender/gpu/shaders/common/gpu_shader_common_curves.glsl
@@ -26,9 +26,29 @@ vec3 extrapolate_if_needed(vec3 parameters, vec3 values, vec3 start_slopes, vec3
   return values + parameters * slopes;
 }
 
-/* Curve maps are stored in sampler objects that are evaluated in the [0, 1] range, so normalize
- * parameters accordingly. */
-#define NORMALIZE_PARAMETER(parameter, minimum, range) ((parameter - minimum) * range)
+/* Curve maps are stored in texture samplers that are evaluated in the [0, 1] range, so normalize
+ * the parameters accordingly. Additionally, ensure that the parameters evaluate the sampler at the
+ * center of the pixels, because samplers are evaluated using linear interpolation. */
+float normalize_parameter(float parameter, float minimum, float range_divider)
+{
+  float normalized_parameter = (parameter - minimum) * range_divider;
+
+  /* Curve maps have a fixed width of 257. We offset by the equivalent of half a pixel and scale
+   * down such that the normalized parameter 1.0 corresponds to the center of the last pixel. */
+  float sampler_offset = 0.5 / 257.0;
+  float sampler_scale = 1.0 - (1.0 / 257.0);
+  return normalized_parameter * sampler_scale + sampler_offset;
+}
+
+/* Same as normalize_parameter but vectorized. */
+vec3 normalize_parameters(vec3 parameters, vec3 minimums, vec3 range_dividers)
+{
+  vec3 normalized_parameters = (parameters - minimums) * range_dividers;
+
+  float sampler_offset = 0.5 / 257.0;
+  float sampler_scale = 1.0 - (1.0 / 257.0);
+  return normalized_parameters * sampler_scale + sampler_offset;
+}
 
 void curves_combined_rgb(float factor,
                          vec4 color,
@@ -46,7 +66,7 @@ void curves_combined_rgb(float factor,
 
   /* First, evaluate alpha curve map at all channels. The alpha curve is the Combined curve in the
    * UI. */
-  vec3 parameters = NORMALIZE_PARAMETER(balanced.rgb, range_minimums.aaa, range_dividers.aaa);
+  vec3 parameters = normalize_parameters(balanced.rgb, range_minimums.aaa, range_dividers.aaa);
   result.r = texture(curve_map, vec2(parameters.x, layer)).a;
   result.g = texture(curve_map, vec2(parameters.y, layer)).a;
   result.b = texture(curve_map, vec2(parameters.z, layer)).a;
@@ -55,13 +75,14 @@ void curves_combined_rgb(float factor,
   result.rgb = extrapolate_if_needed(parameters, result.rgb, start_slopes.aaa, end_slopes.aaa);
 
   /* Then, evaluate each channel on its curve map. */
-  parameters = NORMALIZE_PARAMETER(result.rgb, range_minimums.rgb, range_dividers.rgb);
+  parameters = normalize_parameters(result.rgb, range_minimums.rgb, range_dividers.rgb);
   result.r = texture(curve_map, vec2(parameters.r, layer)).r;
   result.g = texture(curve_map, vec2(parameters.g, layer)).g;
   result.b = texture(curve_map, vec2(parameters.b, layer)).b;
 
   /* Then, extrapolate again if needed. */
   result.rgb = extrapolate_if_needed(parameters, result.rgb, start_slopes.rgb, end_slopes.rgb);
+
   result.a = color.a;
 
   result = mix(color, result, factor);
@@ -83,13 +104,14 @@ void curves_combined_only(float factor,
 
   /* Evaluate alpha curve map at all channels. The alpha curve is the Combined curve in the
    * UI. */
-  vec3 parameters = NORMALIZE_PARAMETER(balanced.rgb, range_minimum, range_divider);
+  vec3 parameters = normalize_parameters(balanced.rgb, vec3(range_minimum), vec3(range_divider));
   result.r = texture(curve_map, vec2(parameters.x, layer)).a;
   result.g = texture(curve_map, vec2(parameters.y, layer)).a;
   result.b = texture(curve_map, vec2(parameters.z, layer)).a;
 
   /* Then, extrapolate if needed. */
   result.rgb = extrapolate_if_needed(parameters, result.rgb, vec3(start_slope), vec3(end_slope));
+
   result.a = color.a;
 
   result = mix(color, result, factor);
@@ -147,8 +169,8 @@ void curves_film_like(float factor,
 
   /* Evaluate alpha curve map at the maximum and minimum channels. The alpha curve is the Combined
    * curve in the UI. */
-  float min_parameter = NORMALIZE_PARAMETER(minimum, range_minimum, range_divider);
-  float max_parameter = NORMALIZE_PARAMETER(maximum, range_minimum, range_divider);
+  float min_parameter = normalize_parameter(minimum, range_minimum, range_divider);
+  float max_parameter = normalize_parameter(maximum, range_minimum, range_divider);
   float new_min = texture(curve_map, vec2(min_parameter, layer)).a;
   float new_max = texture(curve_map, vec2(max_parameter, layer)).a;
 
@@ -165,6 +187,7 @@ void curves_film_like(float factor,
   vec3 median_or_min = mix(vec3(new_median), vec3(new_min), channel_is_min);
   bvec3 channel_is_max = equal(balanced.rgb, vec3(maximum));
   result.rgb = mix(median_or_min, vec3(new_max), channel_is_max);
+
   result.a = color.a;
 
   result = mix(color, result, clamp(factor, 0.0, 1.0));
@@ -180,7 +203,7 @@ void curves_vector(vec3 vector,
                    out vec3 result)
 {
   /* Evaluate each component on its curve map. */
-  vec3 parameters = NORMALIZE_PARAMETER(vector, range_minimums, range_dividers);
+  vec3 parameters = normalize_parameters(vector, range_minimums, range_dividers);
   result.x = texture(curve_map, vec2(parameters.x, layer)).x;
   result.y = texture(curve_map, vec2(parameters.y, layer)).y;
   result.z = texture(curve_map, vec2(parameters.z, layer)).z;
@@ -214,7 +237,7 @@ void curves_float(float value,
                   out float result)
 {
   /* Evaluate the normalized value on the first curve map. */
-  float parameter = NORMALIZE_PARAMETER(value, range_minimum, range_divider);
+  float parameter = normalize_parameter(value, range_minimum, range_divider);
   result = texture(curve_map, vec2(parameter, layer)).x;
 
   /* Then, extrapolate if needed. */
diff --git a/source/blender/gpu/shaders/compositor/compositor_blur.glsl b/source/blender/gpu/shaders/compositor/compositor_blur.glsl
new file mode 100644
index 00000000000..4f981c84f59
--- /dev/null
+++ b/source/blender/gpu/shaders/compositor/compositor_blur.glsl
@@ -0,0 +1,55 @@
+#pragma BLENDER_REQUIRE(gpu_shader_common_math_utils.glsl)
+#pragma BLENDER_REQUIRE(gpu_shader_compositor_texture_utilities.glsl)
+
+vec4 load_input(ivec2 texel)
+{
+  vec4 color;
+  if (extend_bounds) {
+    /* If bounds are extended, then we treat the input as padded by a radius amount of pixels. So
+     * we load the input with an offset by the radius amount and fallback to a transparent color if
+     * it is out of bounds. */
+    color = texture_load(input_tx, texel - radius, vec4(0.0));
+  }
+  else {
+    color = texture_load(input_tx, texel);
+  }
+
+  return color;
+}
+
+/* Given the texel in the range [-radius, radius] in both axis, load the appropriate weight from
+ * the weights texture, where the texel (0, 0) is considered the center of weights texture. */
+vec4 load_weight(ivec2 texel)
+{
+  /* Add the radius to transform the texel into the range [0, radius * 2], then divide by the upper
+   * bound plus one to transform the texel into the normalized range [0, 1] needed to sample the
+   * weights sampler. Finally, also add 0.5 to sample at the center of the pixels. */
+  return texture(weights_tx, (texel + vec2(radius + 0.5)) / (radius * 2 + 1));
+}
+
+void main()
+{
+  ivec2 texel = ivec2(gl_GlobalInvocationID.xy);
+
+  /* The mask input is treated as a boolean. If it is zero, then no blurring happens for this
+   * pixel. Otherwise, the pixel is blurred normally and the mask value is irrelevant. */
+  float mask = texture_load(mask_tx, texel).x;
+  if (mask == 0.0) {
+    imageStore(output_img, texel, texture_load(input_tx, texel));
+    return;
+  }
+
+  /* Go over the window of the given radius and accumulate the colors multiplied by their
+   * respective weights as well as the weights themselves. */
+  vec4 accumulated_color = vec4(0.0);
+  vec4 accumulated_weight = vec4(0.0);
+  for (int y = -radius; y <= radius; y++) {
+    for (int x = -radius; x <= radius; x++) {
+      vec4 weight = load_weight(ivec2(x, y));
+      accumulated_color += load_input(texel + ivec2(x, y)) * weight;
+      accumulated_weight += weight;
+    }
+  }
+
+  imageStore(output_img, texel, safe_divide(accumulated_color, accumulated_weight));
+}
diff --git a/source/blender/gpu/shaders/compositor/compositor_symmetric_blur.glsl b/source/blender/gpu/shaders/compositor/compositor_symmetric_blur.glsl
new file mode 100644
index 00000000000..df08991a35c
--- /dev/null
+++ b/source/blender/gpu/shaders/compositor/compositor_symmetric_blur.glsl
@@ -0,0 +1,77 @@
+#pragma BLENDER_REQUIRE(gpu_shader_compositor_blur_common.glsl)
+#pragma BLENDER_REQUIRE(gpu_shader_compositor_texture_utilities.glsl)
+
+vec4 load_input(ivec2 texel)
+{
+  vec4 color;
+  if (extend_bounds) {
+    /* If bounds are extended, then we treat the input as padded by a radius amount of pixels. So
+     * we load the input with an offset by the radius amount and fallback to a transparent color if
+     * it is out of bounds. Notice that we subtract 1 because the weights texture have an extra
+     * center weight, see the SymmetricBlurWeights for more information. */
+    ivec2 blur_size = texture_size(weights_tx) - 1;
+    color = texture_load(input_tx, texel - blur_size, vec4(0.0));
+  }
+  else {
+    color = texture_load(input_tx, texel);
+  }
+
+  if (gamma_correct) {
+    color = gamma_correct_blur_input(color);
+  }
+
+  return color;
+}
+
+void main()
+{
+  ivec2 texel = ivec2(gl_GlobalInvocationID.xy);
+
+  vec4 accumulated_color = vec4(0.0);
+
+  /* First, compute the contribution of the center pixel. */
+  vec4 center_color = load_input(texel);
+  accumulated_color += center_color * texture_load(weights_tx, ivec2(0)).x;
+
+  ivec2 weights_size = texture_size(weights_tx);
+
+  /* Then, compute the contributions of the pixels along the x axis of the filter, noting that the
+   * weights texture only stores the weights for the positive half, but since the filter is
+   * symmetric, the same weight is used for the negative half and we add both of their
+   * contributions. */
+  for (int x = 1; x < weights_size.x; x++) {
+    float weight = texture_load(weights_tx, ivec2(x, 0)).x;
+    accumulated_color += load_input(texel + ivec2(x, 0)) * weight;
+    accumulated_color += load_input(texel + ivec2(-x, 0)) * weight;
+  }
+
+  /* Then, compute the contributions of the pixels along the y axis of the filter, noting that the
+   * weights texture only stores the weights for the positive half, but since the filter is
+   * symmetric, the same weight is used for the negative half and we add both of their
+   * contributions. */
+  for (int y = 1; y < weights_size.y; y++) {
+    float weight = texture_load(weights_tx, ivec2(0, y)).x;
+    accumulated_color += load_input(texel + ivec2(0, y)) * weight;
+    accumulated_color += load_input(texel + ivec2(0, -y)) * weight;
+  }
+
+  /* Finally, compute the contributions of the pixels in the four quadrants of the filter, noting
+   * that the weights texture only stores the weights for the upper right quadrant, but since the
+   * filter is symmetric, the same weight is used for the rest of the quadrants and we add all four
+   * of their contributions. */
+  for (int y = 1; y < weights_size.y; y++) {
+    for (int x = 1; x < weights_size.x; x++) {
+      float weight = texture_load(weights_tx, ivec2(x, y)).x;
+      accumulated_color += load_input(texel + ivec2(x, y)) * weight;
+      accumulated_color += load_input(texel + ivec2(-x, y)) * weight;
+      accumulated_color += load_input(texel + ivec2(x, -y)) * weight;
+      accumulated_color += load_input(texel + ivec2(-x, -y)) * weight;
+    }
+  }
+
+  if (gamma_correct) {
+    accumulated_color = gamma_uncorrect_blur_output(accumulated_color);
+  }
+
+  imageStore(output_img, texel, accumulated_color);
+}
diff --git a/source/blender/gpu/shaders/compositor/compositor_symmetric_separable_blur.glsl b/source/blender/gpu/shaders/compositor/compositor_symmetric_separable_blur.glsl
new file mode 100644
index 00000000000..ab0c7baa787
--- /dev/null
+++ b/source/blender/gpu/shaders/compositor/compositor_symmetric_separable_blur.glsl
@@ -0,0 +1,53 @@
+#pragma BLENDER_REQUIRE(gpu_shader_compositor_blur_common.glsl)
+#pragma BLENDER_REQUIRE(gpu_shader_compositor_texture_utilities.glsl)
+
+vec4 load_input(ivec2 texel)
+{
+  vec4 color;
+  if (extend_bounds) {
+    /* If bounds are extended, then we treat the input as padded by a radius amount of pixels. So
+     * we load the input with an offset by the radius amount and fallback to a transparent color if
+     * it is out of bounds. Notice that we subtract 1 because the weights texture have an extra
+     * center weight, see the SymmetricSeparableBlurWeights for more information. */
+    int blur_size = texture_size(weights_tx) - 1;
+    color = texture_load(input_tx, texel - ivec2(blur_size, 0), vec4(0.0));
+  }
+  else {
+    color = texture_load(input_tx, texel);
+  }
+
+  if (gamma_correct_input) {
+    color = gamma_correct_blur_input(color);
+  }
+
+  return color;
+}
+
+void main()
+{
+  ivec2 texel = ivec2(gl_GlobalInvocationID.xy);
+
+  vec4 accumulated_color = vec4(0.0);
+
+  /* First, compute the contribution of the center pixel. */
+  vec4 center_color = load_input(texel);
+  accumulated_color += center_color * texture_load(weights_tx, 0).x;
+
+  /* Then, compute the contributions of the pixel to the right and left, noting that the
+   * weights texture only stores the weights for the positive half, but since the filter is
+   * symmetric, the same weight is used for the negative half and we add both of their
+   * contributions. */
+  for (int i = 1; i < texture_size(weights_tx); i++) {
+    float weight = texture_load(weights_tx, i).x;
+    accumulated_color += load_input(texel + ivec2(i, 0)) * weight;
+    accumulated_color += load_input(texel + ivec2(-i, 0)) * weight;
+  }
+
+  if (gamma_uncorrect_output) {
+    accumulated_color = gamma_uncorrect_blur_output(accumulated_color);
+  }
+
+  /* Write the color using the transposed texel. See the execute_separable_blur_horizontal_pass
+   * method for more information on the rational behind this. */
+  imageStore(output_img, texel.yx, accumulated_color);
+}
diff --git a/source/blender/gpu/shaders/compositor/infos/compositor_blur_info.hh b/source/blender/gpu/shaders/compositor/infos/compositor_blur_info.hh
new file mode 100644
index 00000000000..36b772aa486
--- /dev/null
+++ b/source/blender/gpu/shaders/compositor/infos/compositor_blur_info.hh
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "gpu_shader_create_info.hh"
+
+GPU_SHADER_CREATE_INFO(compositor_blur)
+    .local_group_size(16, 16)
+    .push_constant(Type::INT, "radius")
+    .push_constant(Type::BOOL, "extend_bounds")
+    .sampler(0, ImageType::FLOAT_2D, "input_tx")
+    .sampler(1, ImageType::FLOAT_2D, "weights_tx")
+    .sampler(2, ImageType::FLOAT_2D, "mask_tx")
+    .image(0, GPU_RGBA16F, Qualifier::WRITE, ImageType::FLOAT_2D, "output_img")
+    .compute_source("compositor_blur.glsl")
+    .do_static_compilation(true);
diff --git a/source/blender/gpu/shaders/compositor/infos/compositor_symmetric_blur_info.hh b/source/blender/gpu/shaders/compositor/infos/compositor_symmetric_blur_info.hh
new file mode 100644
index 00000000000..8ba2b4e04ef
--- /dev/null
+++ b/source/blender/gpu/shaders/compositor/infos/compositor_symmetric_blur_info.hh
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "gpu_shader_create_info.hh"
+
+GPU_SHADER_CREATE_INFO(compositor_symmetric_blur)
+    .local_group_size(16, 16)
+    .push_constant(Type::BOOL, "extend_bounds")
+    .push_constant(Type::BOOL, "gamma_correct")
+    .sampler(0, ImageType::FLOAT_2D, "input_tx")
+    .sampler(1, ImageType::FLOAT_2D, "weights_tx")
+    .image(0, GPU_RGBA16F, Qualifier::WRITE, ImageType::FLOAT_2D, "output_img")
+    .compute_source("compositor_symmetric_blur.glsl")
+    .do_static_compilation(true);
diff --git a/source/blender/gpu/shaders/compositor/infos/compositor_symmetric_separable_blur_info.hh b/source/blender/gpu/shaders/compositor/infos/compositor_symmetric_separable_blur_info.hh
new file mode 100644
index 00000000000..57247dba4b8
--- /dev/null
+++ b/source/blender/gpu/shaders/compositor/infos/compositor_symmetric_separable_blur_info.hh
@@ -0,0 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "gpu_shader_create_info.hh"
+
+GPU_SHADER_CREATE_INFO(compositor_symmetric_separable_blur)
+    .local_group_size(16, 16)
+    .push_constant(Type::BOOL, "extend_bounds")
+    .push_constant(Type::BOOL, "gamma_correct_input")
+    .push_constant(Type::BOOL, "gamma_uncorrect_output")
+    .sampler(0, ImageType::FLOAT_2D, "input_tx")
+    .sampler(1, ImageType::FLOAT_1D, "weights_tx")
+    .image(0, GPU_RGBA16F, Qualifier::WRITE, ImageType::FLOAT_2D, "output_img")
+    .compute_source("compositor_symmetric_separable_blur.glsl")
+    .do_static_compilation(true);
diff --git a/source/blender/gpu/shaders/compositor/library/gpu_shader_compositor_blur_common.glsl b/source/blender/gpu/shaders/compositor/library/gpu_shader_compositor_blur_common.glsl
new file mode 100644
index 00000000000..e404c03bbb0
--- /dev/null
+++ b/source/blender/gpu/shaders/compositor/library/gpu_shader_compositor_blur_common.glsl
@@ -0,0 +1,32 @@
+/* Preprocess the input of the blur filter by squaring it in its alpha straight form, assuming the
+ * given color is alpha premultiplied. */
+vec4 gamma_correct_blur_input(vec4 color)
+{
+  /* Unpremultiply alpha. */
+  color.rgb /= color.a > 0.0 ? color.a : 1.0;
+
+  /* Square color channel if it is positive, otherwise zero it. */
+  color.rgb *= mix(color.rgb, vec3(0.0), lessThan(color.rgb, vec3(0.0)));
+
+  /* Premultiply alpha to undo previous alpha unpremultiplication. */
+  color.rgb *= color.a > 0.0 ? color.a : 1.0;
+
+  return color;
+}
+
+/* Postprocess the output of the blur filter by taking its square root it in its alpha straight
+ * form, assuming the given color is alpha premultiplied. This essential undoes the processing done
+ * by the gamma_correct_blur_input function. */
+vec4 gamma_uncorrect_blur_output(vec4 color)
+{
+  /* Unpremultiply alpha. */
+  color.rgb /= color.a > 0.0 ? color.a : 1.0;
+
+  /* Take the square root of the color channel if it is positive, otherwise zero it. */
+  color.rgb = mix(sqrt(color.rgb), vec3(0.0), lessThan(color.rgb, vec3(0.0)));
+
+  /* Premultiply alpha to undo previous alpha unpremultiplication. */
+  color.rgb *= color.a > 0.0 ? color.a : 1.0;
+
+  return color;
+}
diff --git a/source/blender/io/alembic/intern/abc_reader_mesh.cc b/source/blender/io/alembic/intern/abc_reader_mesh.cc
index 65d99e3f057..c07aaa37988 100644
--- a/source/blender/io/alembic/intern/abc_reader_mesh.cc
+++ b/source/blender/io/alembic/intern/abc_reader_mesh.cc
@@ -135,8 +135,6 @@ static void read_mverts_interp(MVert *mverts,
 
     interp_v3_v3v3(tmp, floor_pos.getValue(), ceil_pos.getValue(), static_cast<float>(weight));
     copy_zup_from_yup(mvert.co, tmp);
-
-    mvert.bweight = 0;
   }
 }
 
@@ -163,8 +161,6 @@ void read_mverts(Mesh &mesh, const P3fArraySamplePtr positions, const N3fArraySa
     Imath::V3f pos_in = (*positions)[i];
 
     copy_zup_from_yup(mvert.co, pos_in.getValue());
-
-    mvert.bweight = 0;
   }
   if (normals) {
     float(*vert_normals)[3] = BKE_mesh_vertex_normals_for_write(&mesh);
@@ -619,11 +615,7 @@ void AbcMeshReader::readObjectData(Main *bmain, const Alembic::Abc::ISampleSelec
 
   Mesh *read_mesh = this->read_mesh(mesh, sample_sel, MOD_MESHSEQ_READ_ALL, "", 0.0f, nullptr);
   if (read_mesh != mesh) {
-    /* XXX FIXME: after 2.80; mesh->flag isn't copied by #BKE_mesh_nomain_to_mesh(). */
-    /* read_mesh can be freed by BKE_mesh_nomain_to_mesh(), so get the flag before that happens. */
-    uint16_t autosmooth = (read_mesh->flag & ME_AUTOSMOOTH);
-    BKE_mesh_nomain_to_mesh(read_mesh, mesh, m_object, &CD_MASK_EVERYTHING, true);
-    mesh->flag |= autosmooth;
+    BKE_mesh_nomain_to_mesh(read_mesh, mesh, m_object);
   }
 
   if (m_settings->validate_meshes) {
@@ -1003,7 +995,7 @@ void AbcSubDReader::readObjectData(Main *bmain, const Alembic::Abc::ISampleSelec
 
   Mesh *read_mesh = this->read_mesh(mesh, sample_sel, MOD_MESHSEQ_READ_ALL, "", 0.0f, nullptr);
   if (read_mesh != mesh) {
-    BKE_mesh_nomain_to_mesh(read_mesh, mesh, m_object, &CD_MASK_EVERYTHING, true);
+    BKE_mesh_nomain_to_mesh(read_mesh, mesh, m_object);
   }
 
   ISubDSchema::Sample sample;
diff --git a/source/blender/io/alembic/intern/abc_reader_points.cc b/source/blender/io/alembic/intern/abc_reader_points.cc
index ff189bc92dc..54ae71ad7a6 100644
--- a/source/blender/io/alembic/intern/abc_reader_points.cc
+++ b/source/blender/io/alembic/intern/abc_reader_points.cc
@@ -69,7 +69,7 @@ void AbcPointsReader::readObjectData(Main *bmain, const Alembic::Abc::ISampleSel
   Mesh *read_mesh = this->read_mesh(mesh, sample_sel, 0, "", 0.0f, nullptr);
 
   if (read_mesh != mesh) {
-    BKE_mesh_nomain_to_mesh(read_mesh, mesh, m_object, &CD_MASK_MESH, true);
+    BKE_mesh_nomain_to_mesh(read_mesh, mesh, m_object);
   }
 
   if (m_settings->validate_meshes) {
diff --git a/source/blender/io/collada/MeshImporter.cpp b/source/blender/io/collada/MeshImporter.cpp
index e7a4f7b6b51..b22346d0281 100644
--- a/source/blender/io/collada/MeshImporter.cpp
+++ b/source/blender/io/collada/MeshImporter.cpp
@@ -587,7 +587,6 @@ void MeshImporter::read_lines(COLLADAFW::Mesh *mesh, Mesh *me)
         unsigned int *indices = mp->getPositionIndices().getData();
 
         for (int j = 0; j < edge_count; j++, med++) {
-          med->bweight = 0;
           med->crease = 0;
           med->flag |= ME_LOOSEEDGE;
           med->v1 = indices[2 * j];
diff --git a/source/blender/io/usd/intern/usd_reader_mesh.cc b/source/blender/io/usd/intern/usd_reader_mesh.cc
index 0b96cd8ce90..7cb4c65f166 100644
--- a/source/blender/io/usd/intern/usd_reader_mesh.cc
+++ b/source/blender/io/usd/intern/usd_reader_mesh.cc
@@ -248,11 +248,7 @@ void USDMeshReader::read_object_data(Main *bmain, const double motionSampleTime)
 
   is_initial_load_ = false;
   if (read_mesh != mesh) {
-    /* FIXME: after 2.80; `mesh->flag` isn't copied by #BKE_mesh_nomain_to_mesh() */
-    /* read_mesh can be freed by BKE_mesh_nomain_to_mesh(), so get the flag before that happens. */
-    uint16_t autosmooth = (read_mesh->flag & ME_AUTOSMOOTH);
-    BKE_mesh_nomain_to_mesh(read_mesh, mesh, object_, &CD_MASK_MESH, true);
-    mesh->flag |= autosmooth;
+    BKE_mesh_nomain_to_mesh(read_mesh, mesh, object_);
   }
 
   readFaceSetsSample(bmain, mesh, motionSampleTime);
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 b1a2c7834f4..ef05534928a 100644
--- a/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc
+++ b/source/blender/io/wavefront_obj/importer/obj_import_mesh.cc
@@ -69,11 +69,7 @@ Object *MeshFromGeometry::create_mesh(Main *bmain,
   }
   transform_object(obj, import_params);
 
-  /* FIXME: after 2.80; `mesh->flag` isn't copied by #BKE_mesh_nomain_to_mesh() */
-  const uint16_t autosmooth = (mesh->flag & ME_AUTOSMOOTH);
-  Mesh *dst = static_cast<Mesh *>(obj->data);
-  BKE_mesh_nomain_to_mesh(mesh, dst, obj, &CD_MASK_EVERYTHING, true);
-  dst->flag |= autosmooth;
+  BKE_mesh_nomain_to_mesh(mesh, static_cast<Mesh *>(obj->data), obj);
 
   /* NOTE: vertex groups have to be created after final mesh is assigned to the object. */
   create_vertex_groups(obj);
diff --git a/source/blender/makesdna/DNA_gpencil_types.h b/source/blender/makesdna/DNA_gpencil_types.h
index a83262d7639..6a2f25f3975 100644
--- a/source/blender/makesdna/DNA_gpencil_types.h
+++ b/source/blender/makesdna/DNA_gpencil_types.h
@@ -579,7 +579,7 @@ typedef enum eGPDlayer_Flag {
   GP_LAYER_USE_MASK = (1 << 13), /* TODO: DEPRECATED */
   /* Ruler Layer */
   GP_LAYER_IS_RULER = (1 << 14),
-  /* Disable masks in viewlayer render */
+  /* Disable masks in view-layer render */
   GP_LAYER_DISABLE_MASKS_IN_VIEWLAYER = (1 << 15),
 } eGPDlayer_Flag;
 
diff --git a/source/blender/makesdna/DNA_mesh_types.h b/source/blender/makesdna/DNA_mesh_types.h
index 00a9e36612c..d335b36950c 100644
--- a/source/blender/makesdna/DNA_mesh_types.h
+++ b/source/blender/makesdna/DNA_mesh_types.h
@@ -440,8 +440,10 @@ enum {
 
 /** #Mesh.cd_flag */
 enum {
+#ifdef DNA_DEPRECATED_ALLOW
   ME_CDFLAG_VERT_BWEIGHT = 1 << 0,
   ME_CDFLAG_EDGE_BWEIGHT = 1 << 1,
+#endif
   ME_CDFLAG_EDGE_CREASE = 1 << 2,
   ME_CDFLAG_VERT_CREASE = 1 << 3,
 };
diff --git a/source/blender/makesdna/DNA_meshdata_types.h b/source/blender/makesdna/DNA_meshdata_types.h
index e0333f3ef03..e621343b818 100644
--- a/source/blender/makesdna/DNA_meshdata_types.h
+++ b/source/blender/makesdna/DNA_meshdata_types.h
@@ -25,7 +25,11 @@ extern "C" {
  */
 typedef struct MVert {
   float co[3];
-  char flag, bweight;
+  char flag;
+  /**
+   * Deprecated bevel weight storage, now located in #CD_BWEIGHT, except for file read and write.
+   */
+  char bweight DNA_DEPRECATED;
   char _pad[2];
 } MVert;
 
@@ -47,7 +51,11 @@ enum {
 typedef struct MEdge {
   /** Un-ordered vertex indices (cannot match). */
   unsigned int v1, v2;
-  char crease, bweight;
+  char crease;
+  /**
+   * Deprecated bevel weight storage, now located in #CD_BWEIGHT, except for file read and write.
+   */
+  char bweight DNA_DEPRECATED;
   short flag;
 } MEdge;
 
diff --git a/source/blender/makesdna/DNA_node_types.h b/source/blender/makesdna/DNA_node_types.h
index 28bbd3a3e4e..b19210968d9 100644
--- a/source/blender/makesdna/DNA_node_types.h
+++ b/source/blender/makesdna/DNA_node_types.h
@@ -2029,6 +2029,21 @@ typedef enum CMPNodeFlipMode {
   CMP_NODE_FLIP_X_Y = 2,
 } CMPNodeFlipMode;
 
+/* Scale Node. Stored in custom1. */
+typedef enum CMPNodeScaleMethod {
+  CMP_NODE_SCALE_RELATIVE = 0,
+  CMP_NODE_SCALE_ABSOLUTE = 1,
+  CMP_NODE_SCALE_RENDER_PERCENT = 2,
+  CMP_NODE_SCALE_RENDER_SIZE = 3,
+} CMPNodeScaleMethod;
+
+/* Scale Node. Stored in custom2. */
+typedef enum CMPNodeScaleRenderSizeMethod {
+  CMP_NODE_SCALE_RENDER_SIZE_STRETCH = 0,
+  CMP_NODE_SCALE_RENDER_SIZE_FIT = 1,
+  CMP_NODE_SCALE_RENDER_SIZE_CROP = 2,
+} CMPNodeScaleRenderSizeMethod;
+
 /* Filter Node. Stored in custom1. */
 typedef enum CMPNodeFilterMethod {
   CMP_NODE_FILTER_SOFT = 0,
diff --git a/source/blender/makesrna/intern/rna_mesh.c b/source/blender/makesrna/intern/rna_mesh.c
index c36e53a49cd..28ceb0d1d9d 100644
--- a/source/blender/makesrna/intern/rna_mesh.c
+++ b/source/blender/makesrna/intern/rna_mesh.c
@@ -108,13 +108,11 @@ static CustomData *rna_mesh_vdata(const PointerRNA *ptr)
   Mesh *me = rna_mesh(ptr);
   return rna_mesh_vdata_helper(me);
 }
-#  if 0
 static CustomData *rna_mesh_edata(PointerRNA *ptr)
 {
   Mesh *me = rna_mesh(ptr);
   return rna_mesh_edata_helper(me);
 }
-#  endif
 static CustomData *rna_mesh_pdata(const PointerRNA *ptr)
 {
   Mesh *me = rna_mesh(ptr);
@@ -231,6 +229,16 @@ static bool rna_Mesh_has_custom_normals_get(PointerRNA *ptr)
   return BKE_mesh_has_custom_loop_normals(me);
 }
 
+static bool rna_Mesh_has_edge_bevel_weight_get(PointerRNA *ptr)
+{
+  return CustomData_has_layer(rna_mesh_edata(ptr), CD_BWEIGHT);
+}
+
+static bool rna_Mesh_has_vertex_bevel_weight_get(PointerRNA *ptr)
+{
+  return CustomData_has_layer(rna_mesh_vdata(ptr), CD_BWEIGHT);
+}
+
 /** \} */
 
 /* -------------------------------------------------------------------- */
@@ -430,26 +438,36 @@ static void rna_MeshVertex_hide_set(PointerRNA *ptr, bool value)
 
 static float rna_MeshVertex_bevel_weight_get(PointerRNA *ptr)
 {
-  MVert *mvert = (MVert *)ptr->data;
-  return mvert->bweight / 255.0f;
+  const Mesh *mesh = rna_mesh(ptr);
+  const int index = rna_MeshVertex_index_get(ptr);
+  const float *values = (const float *)CustomData_get_layer(&mesh->vdata, CD_BWEIGHT);
+  return values == NULL ? 0.0f : values[index];
 }
 
 static void rna_MeshVertex_bevel_weight_set(PointerRNA *ptr, float value)
 {
-  MVert *mvert = (MVert *)ptr->data;
-  mvert->bweight = round_fl_to_uchar_clamp(value * 255.0f);
+  Mesh *mesh = rna_mesh(ptr);
+  const int index = rna_MeshVertex_index_get(ptr);
+  float *values = (float *)CustomData_add_layer(
+      &mesh->vdata, CD_BWEIGHT, CD_SET_DEFAULT, NULL, mesh->totvert);
+  values[index] = clamp_f(value, 0.0f, 1.0f);
 }
 
 static float rna_MEdge_bevel_weight_get(PointerRNA *ptr)
 {
-  MEdge *medge = (MEdge *)ptr->data;
-  return medge->bweight / 255.0f;
+  const Mesh *mesh = rna_mesh(ptr);
+  const int index = rna_MeshEdge_index_get(ptr);
+  const float *values = (const float *)CustomData_get_layer(&mesh->edata, CD_BWEIGHT);
+  return values == NULL ? 0.0f : values[index];
 }
 
 static void rna_MEdge_bevel_weight_set(PointerRNA *ptr, float value)
 {
-  MEdge *medge = (MEdge *)ptr->data;
-  medge->bweight = round_fl_to_uchar_clamp(value * 255.0f);
+  Mesh *mesh = rna_mesh(ptr);
+  const int index = rna_MeshEdge_index_get(ptr);
+  float *values = (float *)CustomData_add_layer(
+      &mesh->edata, CD_BWEIGHT, CD_SET_DEFAULT, NULL, mesh->totedge);
+  values[index] = clamp_f(value, 0.0f, 1.0f);
 }
 
 static float rna_MEdge_crease_get(PointerRNA *ptr)
@@ -3854,6 +3872,18 @@ static void rna_def_mesh(BlenderRNA *brna)
   RNA_def_property_boolean_funcs(prop, "rna_Mesh_has_custom_normals_get", NULL);
   RNA_define_verify_sdna(true);
 
+  prop = RNA_def_property(srna, "has_bevel_weight_edge", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+  RNA_def_property_ui_text(
+      prop, "Has Edge Bevel Weight", "True if the mesh has an edge bevel weight layer");
+  RNA_def_property_boolean_funcs(prop, "rna_Mesh_has_edge_bevel_weight_get", NULL);
+
+  prop = RNA_def_property(srna, "has_bevel_weight_vertex", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+  RNA_def_property_ui_text(
+      prop, "Has Vertex Bevel Weight", "True if the mesh has an vertex bevel weight layer");
+  RNA_def_property_boolean_funcs(prop, "rna_Mesh_has_vertex_bevel_weight_get", NULL);
+
   prop = RNA_def_property(srna, "texco_mesh", PROP_POINTER, PROP_NONE);
   RNA_def_property_pointer_sdna(prop, NULL, "texcomesh");
   RNA_def_property_flag(prop, PROP_EDITABLE);
@@ -3907,13 +3937,6 @@ static void rna_def_mesh(BlenderRNA *brna)
   RNA_def_property_update(prop, NC_SPACE | ND_SPACE_VIEW3D, "rna_Mesh_update_vertmask");
 
   /* customdata flags */
-  prop = RNA_def_property(srna, "use_customdata_vertex_bevel", PROP_BOOLEAN, PROP_NONE);
-  RNA_def_property_boolean_sdna(prop, NULL, "cd_flag", ME_CDFLAG_VERT_BWEIGHT);
-  RNA_def_property_ui_text(prop, "Store Vertex Bevel Weight", "");
-
-  prop = RNA_def_property(srna, "use_customdata_edge_bevel", PROP_BOOLEAN, PROP_NONE);
-  RNA_def_property_boolean_sdna(prop, NULL, "cd_flag", ME_CDFLAG_EDGE_BWEIGHT);
-  RNA_def_property_ui_text(prop, "Store Edge Bevel Weight", "");
 
   prop = RNA_def_property(srna, "use_customdata_vertex_crease", PROP_BOOLEAN, PROP_NONE);
   RNA_def_property_boolean_sdna(prop, NULL, "cd_flag", ME_CDFLAG_VERT_CREASE);
diff --git a/source/blender/makesrna/intern/rna_mesh_api.c b/source/blender/makesrna/intern/rna_mesh_api.c
index 7551f9d7096..6b1df3fc4d4 100644
--- a/source/blender/makesrna/intern/rna_mesh_api.c
+++ b/source/blender/makesrna/intern/rna_mesh_api.c
@@ -22,6 +22,7 @@
 
 #  include "DNA_mesh_types.h"
 
+#  include "BKE_anim_data.h"
 #  include "BKE_mesh.h"
 #  include "BKE_mesh_mapping.h"
 #  include "BKE_mesh_runtime.h"
@@ -192,6 +193,7 @@ static void rna_Mesh_count_selected_items(Mesh *mesh, int r_count[3])
 static void rna_Mesh_clear_geometry(Mesh *mesh)
 {
   BKE_mesh_clear_geometry(mesh);
+  BKE_animdata_free(&mesh->id, false);
 
   DEG_id_tag_update(&mesh->id, ID_RECALC_GEOMETRY_ALL_MODES);
   WM_main_add_notifier(NC_GEOM | ND_DATA, mesh);
diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index 0be1dd3117c..caeee35a80a 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -7190,18 +7190,18 @@ static void def_cmp_scale(StructRNA *srna)
   PropertyRNA *prop;
 
   static const EnumPropertyItem space_items[] = {
-      {CMP_SCALE_RELATIVE, "RELATIVE", 0, "Relative", ""},
-      {CMP_SCALE_ABSOLUTE, "ABSOLUTE", 0, "Absolute", ""},
-      {CMP_SCALE_SCENEPERCENT, "SCENE_SIZE", 0, "Scene Size", ""},
-      {CMP_SCALE_RENDERPERCENT, "RENDER_SIZE", 0, "Render Size", ""},
+      {CMP_NODE_SCALE_RELATIVE, "RELATIVE", 0, "Relative", ""},
+      {CMP_NODE_SCALE_ABSOLUTE, "ABSOLUTE", 0, "Absolute", ""},
+      {CMP_NODE_SCALE_RENDER_PERCENT, "SCENE_SIZE", 0, "Scene Size", ""},
+      {CMP_NODE_SCALE_RENDER_SIZE, "RENDER_SIZE", 0, "Render Size", ""},
       {0, NULL, 0, NULL, NULL},
   };
 
   /* matching bgpic_camera_frame_items[] */
   static const EnumPropertyItem space_frame_items[] = {
-      {0, "STRETCH", 0, "Stretch", ""},
-      {CMP_SCALE_RENDERSIZE_FRAME_ASPECT, "FIT", 0, "Fit", ""},
-      {CMP_SCALE_RENDERSIZE_FRAME_ASPECT | CMP_SCALE_RENDERSIZE_FRAME_CROP, "CROP", 0, "Crop", ""},
+      {CMP_NODE_SCALE_RENDER_SIZE_STRETCH, "STRETCH", 0, "Stretch", ""},
+      {CMP_NODE_SCALE_RENDER_SIZE_FIT, "FIT", 0, "Fit", ""},
+      {CMP_NODE_SCALE_RENDER_SIZE_CROP, "CROP", 0, "Crop", ""},
       {0, NULL, 0, NULL, NULL},
   };
 
diff --git a/source/blender/modifiers/intern/MOD_array.c b/source/blender/modifiers/intern/MOD_array.c
index bcf1bd36539..7feff30968f 100644
--- a/source/blender/modifiers/intern/MOD_array.c
+++ b/source/blender/modifiers/intern/MOD_array.c
@@ -294,7 +294,7 @@ static void mesh_merge_transform(Mesh *result,
   for (i = 0; i < cap_nverts; i++, mv++) {
     mul_m4_v3(cap_offset, mv->co);
     /* Reset MVert flags for caps */
-    mv->flag = mv->bweight = 0;
+    mv->flag = 0;
   }
 
   /* We have to correct normals too, if we do not tag them as dirty later! */
@@ -560,8 +560,8 @@ static Mesh *arrayModifier_doArray(ArrayModifierData *amd,
   CustomData_copy_data(&mesh->ldata, &result->ldata, 0, 0, chunk_nloops);
   CustomData_copy_data(&mesh->pdata, &result->pdata, 0, 0, chunk_npolys);
 
-  /* Subsurf for eg won't have mesh data in the custom data arrays.
-   * now add mvert/medge/mpoly layers. */
+  /* Subdivision-surface for eg won't have mesh data in the custom-data arrays.
+   * Now add #MVert/#MEdge/#MPoly layers. */
   if (!CustomData_has_layer(&mesh->vdata, CD_MVERT)) {
     memcpy(result_verts, src_verts, sizeof(MVert) * mesh->totvert);
   }
diff --git a/source/blender/modifiers/intern/MOD_bevel.c b/source/blender/modifiers/intern/MOD_bevel.c
index ee9a2856ab0..668843188ab 100644
--- a/source/blender/modifiers/intern/MOD_bevel.c
+++ b/source/blender/modifiers/intern/MOD_bevel.c
@@ -74,6 +74,10 @@ static void requiredDataMask(Object *UNUSED(ob),
   if (bmd->defgrp_name[0] != '\0') {
     r_cddata_masks->vmask |= CD_MASK_MDEFORMVERT;
   }
+  if (bmd->lim_flags & MOD_BEVEL_WEIGHT) {
+    r_cddata_masks->vmask |= CD_MASK_BWEIGHT;
+    r_cddata_masks->emask |= CD_MASK_BWEIGHT;
+  }
 }
 
 /*
diff --git a/source/blender/modifiers/intern/MOD_solidify_extrude.c b/source/blender/modifiers/intern/MOD_solidify_extrude.c
index 343aa3920d9..1456254c31f 100644
--- a/source/blender/modifiers/intern/MOD_solidify_extrude.c
+++ b/source/blender/modifiers/intern/MOD_solidify_extrude.c
@@ -340,11 +340,6 @@ Mesh *MOD_solidify_extrude_modifyMesh(ModifierData *md, const ModifierEvalContex
   MPoly *mpoly = BKE_mesh_polys_for_write(result);
   MLoop *mloop = BKE_mesh_loops_for_write(result);
 
-  if (do_bevel_convex) {
-    /* Make sure bweight is enabled. */
-    result->cd_flag |= ME_CDFLAG_EDGE_BWEIGHT;
-  }
-
   if (do_shell) {
     CustomData_copy_data(&mesh->vdata, &result->vdata, 0, 0, (int)verts_num);
     CustomData_copy_data(&mesh->vdata, &result->vdata, 0, (int)verts_num, (int)verts_num);
@@ -392,6 +387,12 @@ Mesh *MOD_solidify_extrude_modifyMesh(ModifierData *md, const ModifierEvalContex
     CustomData_copy_data(&mesh->pdata, &result->pdata, 0, 0, (int)polys_num);
   }
 
+  float *result_edge_bweight = NULL;
+  if (do_bevel_convex) {
+    result_edge_bweight = CustomData_add_layer(
+        &result->edata, CD_BWEIGHT, CD_SET_DEFAULT, NULL, result->totedge);
+  }
+
   /* initializes: (i_end, do_shell_align, mv). */
 #define INIT_VERT_ARRAY_OFFSETS(test) \
   if (((ofs_new >= ofs_orig) == do_flip) == test) { \
@@ -671,20 +672,18 @@ Mesh *MOD_solidify_extrude_modifyMesh(ModifierData *md, const ModifierEvalContex
       for (uint i = 0; i < edges_num; i++) {
         if (edge_users[i] == INVALID_PAIR) {
           float angle = edge_angs[i];
-          medge[i].bweight = (char)clamp_i(
-              (int)medge[i].bweight + (int)((angle < M_PI ? clamp_f(bevel_convex, 0.0f, 1.0f) :
-                                                            clamp_f(bevel_convex, -1.0f, 0.0f)) *
-                                            255),
-              0,
-              255);
+          result_edge_bweight[i] = clamp_f(result_edge_bweight[i] +
+                                               (angle < M_PI ? clamp_f(bevel_convex, 0.0f, 1.0f) :
+                                                               clamp_f(bevel_convex, -1.0f, 0.0f)),
+                                           0.0f,
+                                           1.0f);
           if (do_shell) {
-            medge[i + edges_num].bweight = (char)clamp_i(
-                (int)medge[i + edges_num].bweight +
-                    (int)((angle > M_PI ? clamp_f(bevel_convex, 0.0f, 1.0f) :
-                                          clamp_f(bevel_convex, -1.0f, 0.0f)) *
-                          255),
+            result_edge_bweight[i + edges_num] = clamp_f(
+                result_edge_bweight[i + edges_num] + (angle > M_PI ?
+                                                          clamp_f(bevel_convex, 0.0f, 1.0f) :
+                                                          clamp_f(bevel_convex, -1.0f, 0.0f)),
                 0,
-                255);
+                1.0f);
           }
         }
       }
@@ -900,20 +899,17 @@ Mesh *MOD_solidify_extrude_modifyMesh(ModifierData *md, const ModifierEvalContex
       for (i = 0; i < edges_num; i++) {
         if (edge_users[i] == INVALID_PAIR) {
           float angle = edge_angs[i];
-          medge[i].bweight = (char)clamp_i(
-              (int)medge[i].bweight + (int)((angle < M_PI ? clamp_f(bevel_convex, 0, 1) :
-                                                            clamp_f(bevel_convex, -1, 0)) *
-                                            255),
-              0,
-              255);
+          result_edge_bweight[i] = clamp_f(result_edge_bweight[i] +
+                                               (angle < M_PI ? clamp_f(bevel_convex, 0.0f, 1.0f) :
+                                                               clamp_f(bevel_convex, -1.0f, 0.0f)),
+                                           0.0f,
+                                           1.0f);
           if (do_shell) {
-            medge[i + edges_num].bweight = (char)clamp_i(
-                (int)medge[i + edges_num].bweight +
-                    (int)((angle > M_PI ? clamp_f(bevel_convex, 0, 1) :
-                                          clamp_f(bevel_convex, -1, 0)) *
-                          255),
-                0,
-                255);
+            result_edge_bweight[i + edges_num] = clamp_f(
+                result_edge_bweight[i + edges_num] +
+                    (angle > M_PI ? clamp_f(bevel_convex, 0, 1) : clamp_f(bevel_convex, -1, 0)),
+                0.0f,
+                1.0f);
           }
         }
       }
diff --git a/source/blender/modifiers/intern/MOD_solidify_nonmanifold.c b/source/blender/modifiers/intern/MOD_solidify_nonmanifold.c
index e73df0d1c12..d3aff5c58c5 100644
--- a/source/blender/modifiers/intern/MOD_solidify_nonmanifold.c
+++ b/source/blender/modifiers/intern/MOD_solidify_nonmanifold.c
@@ -189,6 +189,10 @@ Mesh *MOD_solidify_nonmanifold_modifyMesh(ModifierData *md,
   const MPoly *orig_mpoly = BKE_mesh_polys(mesh);
   const MLoop *orig_mloop = BKE_mesh_loops(mesh);
 
+  /* These might be null. */
+  const float *orig_vert_bweight = CustomData_get_layer(&mesh->vdata, CD_BWEIGHT);
+  const float *orig_edge_bweight = CustomData_get_layer(&mesh->edata, CD_BWEIGHT);
+
   uint new_verts_num = 0;
   uint new_edges_num = 0;
   uint new_loops_num = 0;
@@ -1965,9 +1969,10 @@ Mesh *MOD_solidify_nonmanifold_modifyMesh(ModifierData *md,
   int *origindex_edge = CustomData_get_layer(&result->edata, CD_ORIGINDEX);
   int *origindex_poly = CustomData_get_layer(&result->pdata, CD_ORIGINDEX);
 
-  if (bevel_convex != 0.0f || (result->cd_flag & ME_CDFLAG_VERT_BWEIGHT) != 0) {
-    /* make sure bweight is enabled */
-    result->cd_flag |= ME_CDFLAG_EDGE_BWEIGHT;
+  float *result_edge_bweight = CustomData_get_layer(&result->edata, CD_BWEIGHT);
+  if (bevel_convex != 0.0f || orig_vert_bweight != NULL) {
+    result_edge_bweight = CustomData_add_layer(
+        &result->edata, CD_BWEIGHT, CD_SET_DEFAULT, NULL, result->totedge);
   }
 
   /* Checks that result has dvert data. */
@@ -2038,17 +2043,18 @@ Mesh *MOD_solidify_nonmanifold_modifyMesh(ModifierData *md,
             medge[insert].v2 = v2;
             medge[insert].flag = orig_medge[(*l)->old_edge].flag | ME_EDGEDRAW | ME_EDGERENDER;
             medge[insert].crease = orig_medge[(*l)->old_edge].crease;
-            medge[insert].bweight = orig_medge[(*l)->old_edge].bweight;
+            if (result_edge_bweight) {
+              result_edge_bweight[insert] = orig_edge_bweight[(*l)->old_edge];
+            }
             if (bevel_convex != 0.0f && (*l)->faces[1] != NULL) {
-              medge[insert].bweight = (char)clamp_i(
-                  (int)medge[insert].bweight + (int)(((*l)->angle > M_PI + FLT_EPSILON ?
-                                                          clamp_f(bevel_convex, 0.0f, 1.0f) :
-                                                          ((*l)->angle < M_PI - FLT_EPSILON ?
-                                                               clamp_f(bevel_convex, -1.0f, 0.0f) :
-                                                               0)) *
-                                                     255),
-                  0,
-                  255);
+              result_edge_bweight[insert] = clamp_f(
+                  result_edge_bweight[insert] +
+                      ((*l)->angle > M_PI + FLT_EPSILON ?
+                           clamp_f(bevel_convex, 0.0f, 1.0f) :
+                           ((*l)->angle < M_PI - FLT_EPSILON ? clamp_f(bevel_convex, -1.0f, 0.0f) :
+                                                               0)),
+                  0.0f,
+                  1.0f);
             }
             (*l)->new_edge = insert;
           }
@@ -2113,13 +2119,14 @@ Mesh *MOD_solidify_nonmanifold_modifyMesh(ModifierData *md,
         EdgeGroup *last_g = NULL;
         EdgeGroup *first_g = NULL;
         char mv_crease = vertex_crease ? (char)(vertex_crease[i] * 255.0f) : 0;
+        float mv_bweight = orig_vert_bweight ? orig_vert_bweight[i] : 0.0f;
         /* Data calculation cache. */
         char max_crease;
         char last_max_crease = 0;
         char first_max_crease = 0;
-        char max_bweight;
-        char last_max_bweight = 0;
-        char first_max_bweight = 0;
+        float max_bweight;
+        float last_max_bweight = 0.0f;
+        float first_max_bweight = 0.0f;
         short flag;
         short last_flag = 0;
         short first_flag = 0;
@@ -2142,20 +2149,24 @@ Mesh *MOD_solidify_nonmanifold_modifyMesh(ModifierData *md,
                   max_crease = ed->crease;
                 }
                 if (g->edges[k]->new_edge != MOD_SOLIDIFY_EMPTY_TAG) {
-                  char bweight = medge[g->edges[k]->new_edge].bweight;
-                  if (bweight > max_bweight) {
-                    max_bweight = bweight;
+                  if (result_edge_bweight) {
+                    float bweight = result_edge_bweight[g->edges[k]->new_edge];
+                    if (bweight > max_bweight) {
+                      max_bweight = bweight;
+                    }
                   }
                 }
                 flag |= ed->flag;
               }
             }
 
-            const char bweight_open_edge = min_cc(
-                orig_medge[g->edges[0]->old_edge].bweight,
-                orig_medge[g->edges[g->edges_len - 1]->old_edge].bweight);
+            const float bweight_open_edge =
+                orig_edge_bweight ?
+                    min_ff(orig_edge_bweight[g->edges[0]->old_edge],
+                           orig_edge_bweight[g->edges[g->edges_len - 1]->old_edge]) :
+                    0.0f;
             if (bweight_open_edge > 0) {
-              max_bweight = min_cc(bweight_open_edge, max_bweight);
+              max_bweight = min_ff(bweight_open_edge, max_bweight);
             }
             else {
               if (bevel_convex < 0.0f) {
@@ -2183,8 +2194,11 @@ Mesh *MOD_solidify_nonmanifold_modifyMesh(ModifierData *md,
               medge[edge_index].flag = ME_EDGEDRAW | ME_EDGERENDER |
                                        ((last_flag | flag) & (ME_SEAM | ME_SHARP));
               medge[edge_index].crease = max_cc(mv_crease, min_cc(last_max_crease, max_crease));
-              medge[edge_index++].bweight = max_cc(mv->bweight,
-                                                   min_cc(last_max_bweight, max_bweight));
+              if (result_edge_bweight) {
+                result_edge_bweight[edge_index] = max_ff(mv_bweight,
+                                                         min_ff(last_max_bweight, max_bweight));
+              }
+              edge_index++;
             }
             last_g = g;
             last_max_crease = max_crease;
@@ -2212,8 +2226,11 @@ Mesh *MOD_solidify_nonmanifold_modifyMesh(ModifierData *md,
                                        ((last_flag | first_flag) & (ME_SEAM | ME_SHARP));
               medge[edge_index].crease = max_cc(mv_crease,
                                                 min_cc(last_max_crease, first_max_crease));
-              medge[edge_index++].bweight = max_cc(mv->bweight,
-                                                   min_cc(last_max_bweight, first_max_bweight));
+              if (result_edge_bweight) {
+                result_edge_bweight[edge_index] = max_ff(
+                    mv_bweight, min_ff(last_max_bweight, first_max_bweight));
+              }
+              edge_index++;
 
               /* Loop data. */
               int *loops = MEM_malloc_arrayN(j, sizeof(*loops), "loops in solidify");
diff --git a/source/blender/nodes/NOD_node_declaration.hh b/source/blender/nodes/NOD_node_declaration.hh
index d8b8c354230..42755b2e8dd 100644
--- a/source/blender/nodes/NOD_node_declaration.hh
+++ b/source/blender/nodes/NOD_node_declaration.hh
@@ -92,6 +92,10 @@ class SocketDeclaration {
    * realtime_compositor::InputDescriptor for more information. */
   int compositor_domain_priority_ = 0;
 
+  /** This input shouldn't be realized on the operation domain of the node. See
+   * realtime_compositor::InputDescriptor for more information. */
+  bool compositor_skip_realization_ = false;
+
   /** This input expects a single value and can't operate on non-single values. See
    * realtime_compositor::InputDescriptor for more information. */
   bool compositor_expects_single_value_ = false;
@@ -133,6 +137,7 @@ class SocketDeclaration {
   const OutputFieldDependency &output_field_dependency() const;
 
   int compositor_domain_priority() const;
+  bool compositor_skip_realization() const;
   bool compositor_expects_single_value() const;
 
  protected:
@@ -257,6 +262,14 @@ class SocketDeclarationBuilder : public BaseSocketDeclarationBuilder {
     return *(Self *)this;
   }
 
+  /** This input shouldn't be realized on the operation domain of the node. See
+   * realtime_compositor::InputDescriptor for more information. */
+  Self &compositor_skip_realization(bool value = true)
+  {
+    decl_->compositor_skip_realization_ = value;
+    return *(Self *)this;
+  }
+
   /** This input expects a single value and can't operate on non-single values. See
    * realtime_compositor::InputDescriptor for more information. */
   Self &compositor_expects_single_value(bool value = true)
@@ -460,6 +473,11 @@ inline int SocketDeclaration::compositor_domain_priority() const
   return compositor_domain_priority_;
 }
 
+inline bool SocketDeclaration::compositor_skip_realization() const
+{
+  return compositor_skip_realization_;
+}
+
 inline bool SocketDeclaration::compositor_expects_single_value() const
 {
   return compositor_expects_single_value_;
diff --git a/source/blender/nodes/composite/nodes/node_composite_blur.cc b/source/blender/nodes/composite/nodes/node_composite_blur.cc
index cb1d93fe10b..630f18361e3 100644
--- a/source/blender/nodes/composite/nodes/node_composite_blur.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_blur.cc
@@ -5,12 +5,27 @@
  * \ingroup cmpnodes
  */
 
+#include <cstdint>
+
+#include "BLI_array.hh"
+#include "BLI_assert.h"
+#include "BLI_index_range.hh"
+#include "BLI_math_base.hh"
+#include "BLI_math_vec_types.hh"
+#include "BLI_math_vector.hh"
+
 #include "RNA_access.h"
 
 #include "UI_interface.h"
 #include "UI_resources.h"
 
+#include "RE_pipeline.h"
+
+#include "GPU_state.h"
+#include "GPU_texture.h"
+
 #include "COM_node_operation.hh"
+#include "COM_utilities.hh"
 
 #include "node_composite_util.hh"
 
@@ -18,6 +33,8 @@
 
 namespace blender::nodes::node_composite_blur_cc {
 
+NODE_STORAGE_FUNCS(NodeBlurData)
+
 static void cmp_node_blur_declare(NodeDeclarationBuilder &b)
 {
   b.add_input<decl::Color>(N_("Image")).default_value({1.0f, 1.0f, 1.0f, 1.0f});
@@ -75,13 +92,395 @@ static void node_composit_buts_blur(uiLayout *layout, bContext *UNUSED(C), Point
 
 using namespace blender::realtime_compositor;
 
+/* A helper class that computes and caches a 1D GPU texture containing the weights of the separable
+ * filter of the given type and radius. The filter is assumed to be symmetric, because the filter
+ * functions are all even functions. Consequently, only the positive half of the filter is computed
+ * and the shader takes that into consideration. */
+class SymmetricSeparableBlurWeights {
+ private:
+  float radius_ = 1.0f;
+  int type_ = R_FILTER_GAUSS;
+  GPUTexture *texture_ = nullptr;
+
+ public:
+  ~SymmetricSeparableBlurWeights()
+  {
+    if (texture_) {
+      GPU_texture_free(texture_);
+    }
+  }
+
+  /* Check if a texture containing the weights was already computed for the given filter type and
+   * radius. If such texture exists, do nothing, otherwise, free the already computed texture and
+   * recompute it with the given filter type and radius. */
+  void update(float radius, int type)
+  {
+    if (texture_ && type == type_ && radius == radius_) {
+      return;
+    }
+
+    if (texture_) {
+      GPU_texture_free(texture_);
+    }
+
+    /* The size of filter is double the radius plus 1, but since the filter is symmetric, we only
+     * compute half of it and no doubling happens. We add 1 to make sure the filter size is always
+     * odd and there is a center weight. */
+    const int size = math::ceil(radius) + 1;
+    Array<float> weights(size);
+
+    float sum = 0.0f;
+
+    /* First, compute the center weight. */
+    const float center_weight = RE_filter_value(type, 0.0f);
+    weights[0] = center_weight;
+    sum += center_weight;
+
+    /* Second, compute the other weights in the positive direction, making sure to add double the
+     * weight to the sum of weights because the filter is symmetric and we only loop over half of
+     * it. Skip the center weight already computed by dropping the front index. */
+    const float scale = radius > 0.0f ? 1.0f / radius : 0.0f;
+    for (const int i : weights.index_range().drop_front(1)) {
+      const float weight = RE_filter_value(type, i * scale);
+      weights[i] = weight;
+      sum += weight * 2.0f;
+    }
+
+    /* Finally, normalize the weights. */
+    for (const int i : weights.index_range()) {
+      weights[i] /= sum;
+    }
+
+    texture_ = GPU_texture_create_1d("Weights", size, 1, GPU_R16F, weights.data());
+
+    type_ = type;
+    radius_ = radius;
+  }
+
+  void bind_as_texture(GPUShader *shader, const char *texture_name)
+  {
+    const int texture_image_unit = GPU_shader_get_texture_binding(shader, texture_name);
+    GPU_texture_bind(texture_, texture_image_unit);
+  }
+
+  void unbind_as_texture()
+  {
+    GPU_texture_unbind(texture_);
+  }
+};
+
+/* A helper class that computes and caches a 2D GPU texture containing the weights of the filter of
+ * the given type and radius. The filter is assumed to be symmetric, because the filter functions
+ * are evaluated on the normalized distance to the center. Consequently, only the upper right
+ * quadrant are computed and the shader takes that into consideration. */
+class SymmetricBlurWeights {
+ private:
+  int type_ = R_FILTER_GAUSS;
+  float2 radius_ = float2(1.0f);
+  GPUTexture *texture_ = nullptr;
+
+ public:
+  ~SymmetricBlurWeights()
+  {
+    if (texture_) {
+      GPU_texture_free(texture_);
+    }
+  }
+
+  /* Check if a texture containing the weights was already computed for the given filter type and
+   * radius. If such texture exists, do nothing, otherwise, free the already computed texture and
+   * recompute it with the given filter type and radius. */
+  void update(float2 radius, int type)
+  {
+    if (texture_ && type == type_ && radius == radius_) {
+      return;
+    }
+
+    if (texture_) {
+      GPU_texture_free(texture_);
+    }
+
+    /* The full size of filter is double the radius plus 1, but since the filter is symmetric, we
+     * only compute a single quadrant of it and so no doubling happens. We add 1 to make sure the
+     * filter size is always odd and there is a center weight. */
+    const float2 scale = math::safe_divide(float2(1.0f), radius);
+    const int2 size = int2(math::ceil(radius)) + int2(1);
+    Array<float> weights(size.x * size.y);
+
+    float sum = 0.0f;
+
+    /* First, compute the center weight. */
+    const float center_weight = RE_filter_value(type, 0.0f);
+    weights[0] = center_weight;
+    sum += center_weight;
+
+    /* Then, compute the weights along the positive x axis, making sure to add double the weight to
+     * the sum of weights because the filter is symmetric and we only loop over the positive half
+     * of the x axis. Skip the center weight already computed by dropping the front index. */
+    for (const int x : IndexRange(size.x).drop_front(1)) {
+      const float weight = RE_filter_value(type, x * scale.x);
+      weights[x] = weight;
+      sum += weight * 2.0f;
+    }
+
+    /* Then, compute the weights along the positive y axis, making sure to add double the weight to
+     * the sum of weights because the filter is symmetric and we only loop over the positive half
+     * of the y axis. Skip the center weight already computed by dropping the front index. */
+    for (const int y : IndexRange(size.y).drop_front(1)) {
+      const float weight = RE_filter_value(type, y * scale.y);
+      weights[size.x * y] = weight;
+      sum += weight * 2.0f;
+    }
+
+    /* Then, compute the other weights in the upper right quadrant, making sure to add quadruple
+     * the weight to the sum of weights because the filter is symmetric and we only loop over one
+     * quadrant of it. Skip the weights along the y and x axis already computed by dropping the
+     * front index. */
+    for (const int y : IndexRange(size.y).drop_front(1)) {
+      for (const int x : IndexRange(size.x).drop_front(1)) {
+        const float weight = RE_filter_value(type, math::length(float2(x, y) * scale));
+        weights[size.x * y + x] = weight;
+        sum += weight * 4.0f;
+      }
+    }
+
+    /* Finally, normalize the weights. */
+    for (const int y : IndexRange(size.y)) {
+      for (const int x : IndexRange(size.x)) {
+        weights[size.x * y + x] /= sum;
+      }
+    }
+
+    texture_ = GPU_texture_create_2d("Weights", size.x, size.y, 1, GPU_R16F, weights.data());
+
+    type_ = type;
+    radius_ = radius;
+  }
+
+  void bind_as_texture(GPUShader *shader, const char *texture_name)
+  {
+    const int texture_image_unit = GPU_shader_get_texture_binding(shader, texture_name);
+    GPU_texture_bind(texture_, texture_image_unit);
+  }
+
+  void unbind_as_texture()
+  {
+    GPU_texture_unbind(texture_);
+  }
+};
+
 class BlurOperation : public NodeOperation {
+ private:
+  /* Cached symmetric blur weights. */
+  SymmetricBlurWeights blur_weights_;
+  /* Cached symmetric blur weights for the separable horizontal pass. */
+  SymmetricSeparableBlurWeights blur_horizontal_weights_;
+  /* Cached symmetric blur weights for the separable vertical pass. */
+  SymmetricSeparableBlurWeights blur_vertical_weights_;
+
  public:
   using NodeOperation::NodeOperation;
 
   void execute() override
   {
-    get_input("Image").pass_through(get_result("Image"));
+    if (is_identity()) {
+      get_input("Image").pass_through(get_result("Image"));
+      return;
+    }
+
+    if (use_separable_filter()) {
+      GPUTexture *horizontal_pass_result = execute_separable_blur_horizontal_pass();
+      execute_separable_blur_vertical_pass(horizontal_pass_result);
+    }
+    else {
+      execute_blur();
+    }
+  }
+
+  void execute_blur()
+  {
+    GPUShader *shader = shader_manager().get("compositor_symmetric_blur");
+    GPU_shader_bind(shader);
+
+    GPU_shader_uniform_1b(shader, "extend_bounds", get_extend_bounds());
+    GPU_shader_uniform_1b(shader, "gamma_correct", node_storage(bnode()).gamma);
+
+    const Result &input_image = get_input("Image");
+    input_image.bind_as_texture(shader, "input_tx");
+
+    blur_weights_.update(compute_blur_radius(), node_storage(bnode()).filtertype);
+    blur_weights_.bind_as_texture(shader, "weights_tx");
+
+    Domain domain = compute_domain();
+    if (get_extend_bounds()) {
+      /* Add a radius amount of pixels in both sides of the image, hence the multiply by 2. */
+      domain.size += int2(math::ceil(compute_blur_radius())) * 2;
+    }
+
+    Result &output_image = get_result("Image");
+    output_image.allocate_texture(domain);
+    output_image.bind_as_image(shader, "output_img");
+
+    compute_dispatch_threads_at_least(shader, domain.size);
+
+    GPU_shader_unbind();
+    output_image.unbind_as_image();
+    input_image.unbind_as_texture();
+    blur_weights_.unbind_as_texture();
+  }
+
+  GPUTexture *execute_separable_blur_horizontal_pass()
+  {
+    GPUShader *shader = shader_manager().get("compositor_symmetric_separable_blur");
+    GPU_shader_bind(shader);
+
+    GPU_shader_uniform_1b(shader, "extend_bounds", get_extend_bounds());
+    GPU_shader_uniform_1b(shader, "gamma_correct_input", node_storage(bnode()).gamma);
+    GPU_shader_uniform_1b(shader, "gamma_uncorrect_output", false);
+
+    const Result &input_image = get_input("Image");
+    input_image.bind_as_texture(shader, "input_tx");
+
+    blur_horizontal_weights_.update(compute_blur_radius().x, node_storage(bnode()).filtertype);
+    blur_horizontal_weights_.bind_as_texture(shader, "weights_tx");
+
+    Domain domain = compute_domain();
+    if (get_extend_bounds()) {
+      domain.size.x += static_cast<int>(math::ceil(compute_blur_radius().x)) * 2;
+    }
+
+    /* We allocate an output image of a transposed size, that is, with a height equivalent to the
+     * width of the input and vice versa. This is done as a performance optimization. The shader
+     * will blur the image horizontally and write it to the intermediate output transposed. Then
+     * the vertical pass will execute the same horizontal blur shader, but since its input is
+     * transposed, it will effectively do a vertical blur and write to the output transposed,
+     * effectively undoing the transposition in the horizontal pass. This is done to improve
+     * spatial cache locality in the shader and to avoid having two separate shaders for each blur
+     * pass. */
+    const int2 transposed_domain = int2(domain.size.y, domain.size.x);
+
+    GPUTexture *horizontal_pass_result = texture_pool().acquire_color(transposed_domain);
+    const int image_unit = GPU_shader_get_texture_binding(shader, "output_img");
+    GPU_texture_image_bind(horizontal_pass_result, image_unit);
+
+    compute_dispatch_threads_at_least(shader, domain.size);
+
+    GPU_shader_unbind();
+    input_image.unbind_as_texture();
+    blur_horizontal_weights_.unbind_as_texture();
+    GPU_texture_image_unbind(horizontal_pass_result);
+
+    return horizontal_pass_result;
+  }
+
+  void execute_separable_blur_vertical_pass(GPUTexture *horizontal_pass_result)
+  {
+    GPUShader *shader = shader_manager().get("compositor_symmetric_separable_blur");
+    GPU_shader_bind(shader);
+
+    GPU_shader_uniform_1b(shader, "extend_bounds", get_extend_bounds());
+    GPU_shader_uniform_1b(shader, "gamma_correct_input", false);
+    GPU_shader_uniform_1b(shader, "gamma_uncorrect_output", node_storage(bnode()).gamma);
+
+    GPU_memory_barrier(GPU_BARRIER_TEXTURE_FETCH);
+    const int texture_image_unit = GPU_shader_get_texture_binding(shader, "input_tx");
+    GPU_texture_bind(horizontal_pass_result, texture_image_unit);
+
+    blur_vertical_weights_.update(compute_blur_radius().y, node_storage(bnode()).filtertype);
+    blur_vertical_weights_.bind_as_texture(shader, "weights_tx");
+
+    Domain domain = compute_domain();
+    if (get_extend_bounds()) {
+      /* Add a radius amount of pixels in both sides of the image, hence the multiply by 2. */
+      domain.size += int2(math::ceil(compute_blur_radius())) * 2;
+    }
+
+    Result &output_image = get_result("Image");
+    output_image.allocate_texture(domain);
+    output_image.bind_as_image(shader, "output_img");
+
+    /* Notice that the domain is transposed, see the note on the horizontal pass method for more
+     * information on the reasoning behind this. */
+    compute_dispatch_threads_at_least(shader, int2(domain.size.y, domain.size.x));
+
+    GPU_shader_unbind();
+    output_image.unbind_as_image();
+    blur_vertical_weights_.unbind_as_texture();
+    GPU_texture_unbind(horizontal_pass_result);
+  }
+
+  float2 compute_blur_radius()
+  {
+    const float size = math::clamp(get_input("Size").get_float_value_default(1.0f), 0.0f, 1.0f);
+
+    if (!node_storage(bnode()).relative) {
+      return float2(node_storage(bnode()).sizex, node_storage(bnode()).sizey) * size;
+    }
+
+    int2 image_size = get_input("Image").domain().size;
+    switch (node_storage(bnode()).aspect) {
+      case CMP_NODE_BLUR_ASPECT_Y:
+        image_size.y = image_size.x;
+        break;
+      case CMP_NODE_BLUR_ASPECT_X:
+        image_size.x = image_size.y;
+        break;
+      default:
+        BLI_assert(node_storage(bnode()).aspect == CMP_NODE_BLUR_ASPECT_NONE);
+        break;
+    }
+
+    return float2(image_size) * get_size_factor() * size;
+  }
+
+  /* Returns true if the operation does nothing and the input can be passed through. */
+  bool is_identity()
+  {
+    const Result &input = get_input("Image");
+    /* Single value inputs can't be blurred and are returned as is. */
+    if (input.is_single_value()) {
+      return true;
+    }
+
+    /* Zero blur radius. The operation does nothing and the input can be passed through. */
+    if (compute_blur_radius() == float2(0.0)) {
+      return true;
+    }
+
+    return false;
+  }
+
+  /* The blur node can operate with different filter types, evaluated on the normalized distance to
+   * the center of the filter. Some of those filters are separable and can be computed as such. If
+   * the bokeh member is disabled in the node, then the filter is always computed as separable even
+   * if it is not in fact separable, in which case, the used filter is a cheaper approximation to
+   * the actual filter. If the bokeh member is enabled, then the filter is computed as separable if
+   * it is in fact separable and as a normal 2D filter otherwise. */
+  bool use_separable_filter()
+  {
+    if (!node_storage(bnode()).bokeh) {
+      return true;
+    }
+
+    /* Both Box and Gaussian filters are separable. The rest is not. */
+    switch (node_storage(bnode()).filtertype) {
+      case R_FILTER_BOX:
+      case R_FILTER_GAUSS:
+      case R_FILTER_FAST_GAUSS:
+        return true;
+      default:
+        return false;
+    }
+  }
+
+  float2 get_size_factor()
+  {
+    return float2(node_storage(bnode()).percentx, node_storage(bnode()).percenty) / 100.0f;
+  }
+
+  bool get_extend_bounds()
+  {
+    return bnode().custom1 & CMP_NODEFLAG_BLUR_EXTEND_BOUNDS;
   }
 };
 
diff --git a/source/blender/nodes/composite/nodes/node_composite_bokehblur.cc b/source/blender/nodes/composite/nodes/node_composite_bokehblur.cc
index 538f00af12d..182169405de 100644
--- a/source/blender/nodes/composite/nodes/node_composite_bokehblur.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_bokehblur.cc
@@ -5,10 +5,16 @@
  * \ingroup cmpnodes
  */
 
+#include "BLI_math_base.hh"
+#include "BLI_math_vec_types.hh"
+
 #include "UI_interface.h"
 #include "UI_resources.h"
 
+#include "GPU_texture.h"
+
 #include "COM_node_operation.hh"
+#include "COM_utilities.hh"
 
 #include "node_composite_util.hh"
 
@@ -18,10 +24,22 @@ namespace blender::nodes::node_composite_bokehblur_cc {
 
 static void cmp_node_bokehblur_declare(NodeDeclarationBuilder &b)
 {
-  b.add_input<decl::Color>(N_("Image")).default_value({0.8f, 0.8f, 0.8f, 1.0f});
-  b.add_input<decl::Color>(N_("Bokeh")).default_value({1.0f, 1.0f, 1.0f, 1.0f});
-  b.add_input<decl::Float>(N_("Size")).default_value(1.0f).min(0.0f).max(10.0f);
-  b.add_input<decl::Float>(N_("Bounding box")).default_value(1.0f).min(0.0f).max(1.0f);
+  b.add_input<decl::Color>(N_("Image"))
+      .default_value({0.8f, 0.8f, 0.8f, 1.0f})
+      .compositor_domain_priority(0);
+  b.add_input<decl::Color>(N_("Bokeh"))
+      .default_value({1.0f, 1.0f, 1.0f, 1.0f})
+      .compositor_skip_realization();
+  b.add_input<decl::Float>(N_("Size"))
+      .default_value(1.0f)
+      .min(0.0f)
+      .max(10.0f)
+      .compositor_domain_priority(1);
+  b.add_input<decl::Float>(N_("Bounding box"))
+      .default_value(1.0f)
+      .min(0.0f)
+      .max(1.0f)
+      .compositor_domain_priority(2);
   b.add_output<decl::Color>(N_("Image"));
 }
 
@@ -47,7 +65,82 @@ class BokehBlurOperation : public NodeOperation {
 
   void execute() override
   {
-    get_input("Image").pass_through(get_result("Image"));
+    if (is_identity()) {
+      get_input("Image").pass_through(get_result("Image"));
+      return;
+    }
+
+    GPUShader *shader = shader_manager().get("compositor_blur");
+    GPU_shader_bind(shader);
+
+    GPU_shader_uniform_1i(shader, "radius", compute_blur_radius());
+    GPU_shader_uniform_1b(shader, "extend_bounds", get_extend_bounds());
+
+    const Result &input_image = get_input("Image");
+    input_image.bind_as_texture(shader, "input_tx");
+
+    const Result &input_weights = get_input("Bokeh");
+    input_weights.bind_as_texture(shader, "weights_tx");
+
+    const Result &input_mask = get_input("Bounding box");
+    input_mask.bind_as_texture(shader, "mask_tx");
+
+    Domain domain = compute_domain();
+    if (get_extend_bounds()) {
+      /* Add a radius amount of pixels in both sides of the image, hence the multiply by 2. */
+      domain.size += int2(compute_blur_radius() * 2);
+    }
+
+    Result &output_image = get_result("Image");
+    output_image.allocate_texture(domain);
+    output_image.bind_as_image(shader, "output_img");
+
+    compute_dispatch_threads_at_least(shader, domain.size);
+
+    GPU_shader_unbind();
+    output_image.unbind_as_image();
+    input_image.unbind_as_texture();
+    input_weights.unbind_as_texture();
+    input_mask.unbind_as_texture();
+  }
+
+  int compute_blur_radius()
+  {
+    const int2 image_size = get_input("Image").domain().size;
+    const int max_size = math::max(image_size.x, image_size.y);
+
+    /* The [0, 10] range of the size is arbitrary and is merely in place to avoid very long
+     * computations of the bokeh blur. */
+    const float size = math::clamp(get_input("Size").get_float_value_default(1.0f), 0.0f, 10.0f);
+
+    /* The 100 divisor is arbitrary and was chosen using visual judgement. */
+    return size * (max_size / 100.0f);
+  }
+
+  bool is_identity()
+  {
+    const Result &input = get_input("Image");
+    if (input.is_single_value()) {
+      return true;
+    }
+
+    if (compute_blur_radius() == 0) {
+      return true;
+    }
+
+    /* This input is, in fact, a boolean mask. If it is zero, no blurring will take place.
+     * Otherwise, the blurring will take place ignoring the value of the input entirely. */
+    const Result &bounding_box = get_input("Bounding box");
+    if (bounding_box.is_single_value() && bounding_box.get_float_value() == 0.0) {
+      return true;
+    }
+
+    return false;
+  }
+
+  bool get_extend_bounds()
+  {
+    return bnode().custom1 & CMP_NODEFLAG_BLUR_EXTEND_BOUNDS;
   }
 };
 
diff --git a/source/blender/nodes/composite/nodes/node_composite_pixelate.cc b/source/blender/nodes/composite/nodes/node_composite_pixelate.cc
index 4567464a547..c4e42f8247d 100644
--- a/source/blender/nodes/composite/nodes/node_composite_pixelate.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_pixelate.cc
@@ -5,6 +5,9 @@
  * \ingroup cmpnodes
  */
 
+#include "BLI_math_vec_types.hh"
+#include "BLI_math_vector.hh"
+
 #include "COM_node_operation.hh"
 
 #include "node_composite_util.hh"
@@ -27,8 +30,34 @@ class PixelateOperation : public NodeOperation {
 
   void execute() override
   {
+    /* It might seems strange that the input is passed through without any processing, but note
+     * that the actual processing happens inside the domain realization input processor of the
+     * input. Indeed, the pixelate node merely realizes its input on a smaller-sized domain that
+     * matches its apparent size, that is, its size after the domain transformation. The pixelate
+     * node has no effect if the input is scaled-up. See the compute_domain method for more
+     * information. */
     get_input("Color").pass_through(get_result("Color"));
   }
+
+  /* Compute a smaller-sized domain that matches the apparent size of the input while having a unit
+   * scale transformation, see the execute method for more information. */
+  Domain compute_domain() override
+  {
+    Domain domain = get_input("Color").domain();
+
+    /* Get the scaling component of the domain transformation, but make sure it doesn't exceed 1,
+     * because pixelation should only happen if the input is scaled down. */
+    const float2 scale = math::min(float2(1.0f), domain.transformation.scale_2d());
+
+    /* Multiply the size of the domain by its scale to match its apparent size, but make sure it is
+     * at least 1 pixel in both axis. */
+    domain.size = math::max(int2(float2(domain.size) * scale), int2(1));
+
+    /* Reset the scale of the transformation by transforming it with the inverse of the scale. */
+    domain.transformation *= float3x3::from_scale(math::safe_divide(float2(1.0f), scale));
+
+    return domain;
+  }
 };
 
 static NodeOperation *get_compositor_operation(Context &context, DNode node)
diff --git a/source/blender/nodes/composite/nodes/node_composite_scale.cc b/source/blender/nodes/composite/nodes/node_composite_scale.cc
index 8b43ae8c9ca..eb2d7162c69 100644
--- a/source/blender/nodes/composite/nodes/node_composite_scale.cc
+++ b/source/blender/nodes/composite/nodes/node_composite_scale.cc
@@ -5,6 +5,11 @@
  * \ingroup cmpnodes
  */
 
+#include "BLI_assert.h"
+#include "BLI_float3x3.hh"
+#include "BLI_math_base.hh"
+#include "BLI_math_vec_types.hh"
+
 #include "RNA_access.h"
 
 #include "UI_interface.h"
@@ -20,16 +25,26 @@ namespace blender::nodes::node_composite_scale_cc {
 
 static void cmp_node_scale_declare(NodeDeclarationBuilder &b)
 {
-  b.add_input<decl::Color>(N_("Image")).default_value({1.0f, 1.0f, 1.0f, 1.0f});
-  b.add_input<decl::Float>(N_("X")).default_value(1.0f).min(0.0001f).max(CMP_SCALE_MAX);
-  b.add_input<decl::Float>(N_("Y")).default_value(1.0f).min(0.0001f).max(CMP_SCALE_MAX);
+  b.add_input<decl::Color>(N_("Image"))
+      .default_value({1.0f, 1.0f, 1.0f, 1.0f})
+      .compositor_domain_priority(0);
+  b.add_input<decl::Float>(N_("X"))
+      .default_value(1.0f)
+      .min(0.0001f)
+      .max(CMP_SCALE_MAX)
+      .compositor_expects_single_value();
+  b.add_input<decl::Float>(N_("Y"))
+      .default_value(1.0f)
+      .min(0.0001f)
+      .max(CMP_SCALE_MAX)
+      .compositor_expects_single_value();
   b.add_output<decl::Color>(N_("Image"));
 }
 
 static void node_composite_update_scale(bNodeTree *ntree, bNode *node)
 {
   bNodeSocket *sock;
-  bool use_xy_scale = ELEM(node->custom1, CMP_SCALE_RELATIVE, CMP_SCALE_ABSOLUTE);
+  bool use_xy_scale = ELEM(node->custom1, CMP_NODE_SCALE_RELATIVE, CMP_NODE_SCALE_ABSOLUTE);
 
   /* Only show X/Y scale factor inputs for modes using them! */
   for (sock = (bNodeSocket *)node->inputs.first; sock; sock = sock->next) {
@@ -43,7 +58,7 @@ static void node_composit_buts_scale(uiLayout *layout, bContext *UNUSED(C), Poin
 {
   uiItemR(layout, ptr, "space", UI_ITEM_R_SPLIT_EMPTY_NAME, "", ICON_NONE);
 
-  if (RNA_enum_get(ptr, "space") == CMP_SCALE_RENDERPERCENT) {
+  if (RNA_enum_get(ptr, "space") == CMP_NODE_SCALE_RENDER_SIZE) {
     uiLayout *row;
     uiItemR(layout,
             ptr,
@@ -65,7 +80,129 @@ class ScaleOperation : public NodeOperation {
 
   void execute() override
   {
-    get_input("Image").pass_through(get_result("Image"));
+    Result &input = get_input("Image");
+    Result &result = get_result("Image");
+    input.pass_through(result);
+
+    const float3x3 transformation = float3x3::from_translation_rotation_scale(
+        get_translation(), 0.0f, get_scale());
+
+    result.transform(transformation);
+    result.get_realization_options().interpolation = Interpolation::Bilinear;
+  }
+
+  float2 get_scale()
+  {
+    switch (get_scale_method()) {
+      case CMP_NODE_SCALE_RELATIVE:
+        return get_scale_relative();
+      case CMP_NODE_SCALE_ABSOLUTE:
+        return get_scale_absolute();
+      case CMP_NODE_SCALE_RENDER_PERCENT:
+        return get_scale_render_percent();
+      case CMP_NODE_SCALE_RENDER_SIZE:
+        return get_scale_render_size();
+      default:
+        BLI_assert_unreachable();
+        return float2(1.0f);
+    }
+  }
+
+  /* Scale by the input factors. */
+  float2 get_scale_relative()
+  {
+    return float2(get_input("X").get_float_value_default(1.0f),
+                  get_input("Y").get_float_value_default(1.0f));
+  }
+
+  /* Scale such that the new size matches the input absolute size. */
+  float2 get_scale_absolute()
+  {
+    const float2 input_size = float2(get_input("Image").domain().size);
+    const float2 absolute_size = float2(get_input("X").get_float_value_default(1.0f),
+                                        get_input("Y").get_float_value_default(1.0f));
+    return absolute_size / input_size;
+  }
+
+  /* Scale by the render resolution percentage. */
+  float2 get_scale_render_percent()
+  {
+    return float2(context().get_scene()->r.size / 100.0f);
+  }
+
+  float2 get_scale_render_size()
+  {
+    switch (get_scale_render_size_method()) {
+      case CMP_NODE_SCALE_RENDER_SIZE_STRETCH:
+        return get_scale_render_size_stretch();
+      case CMP_NODE_SCALE_RENDER_SIZE_FIT:
+        return get_scale_render_size_fit();
+      case CMP_NODE_SCALE_RENDER_SIZE_CROP:
+        return get_scale_render_size_crop();
+      default:
+        BLI_assert_unreachable();
+        return float2(1.0f);
+    }
+  }
+
+  /* Scale such that the new size matches the render size. Since the input is freely scaled, it is
+   * potentially stretched, hence the name. */
+  float2 get_scale_render_size_stretch()
+  {
+    const float2 input_size = float2(get_input("Image").domain().size);
+    const float2 render_size = float2(context().get_output_size());
+    return render_size / input_size;
+  }
+
+  /* Scale such that the dimension with the smaller scaling factor matches that of the render size
+   * while maintaining the input's aspect ratio. Since the other dimension is guaranteed not to
+   * exceed the render size region due to its larger scaling factor, the image is said to be fit
+   * inside that region, hence the name. */
+  float2 get_scale_render_size_fit()
+  {
+    const float2 input_size = float2(get_input("Image").domain().size);
+    const float2 render_size = float2(context().get_output_size());
+    const float2 scale = render_size / input_size;
+    return float2(math::min(scale.x, scale.y));
+  }
+
+  /* Scale such that the dimension with the larger scaling factor matches that of the render size
+   * while maintaining the input's aspect ratio. Since the other dimension is guaranteed to exceed
+   * the render size region due to its lower scaling factor, the image will be cropped inside that
+   * region, hence the name. */
+  float2 get_scale_render_size_crop()
+  {
+    const float2 input_size = float2(get_input("Image").domain().size);
+    const float2 render_size = float2(context().get_output_size());
+    const float2 scale = render_size / input_size;
+    return float2(math::max(scale.x, scale.y));
+  }
+
+  float2 get_translation()
+  {
+    /* Only the render size option supports offset translation. */
+    if (get_scale_method() != CMP_NODE_SCALE_RENDER_SIZE) {
+      return float2(0.0f);
+    }
+
+    /* Translate by the offset factor relative to the new size. */
+    const float2 input_size = float2(get_input("Image").domain().size);
+    return get_offset() * input_size * get_scale();
+  }
+
+  CMPNodeScaleMethod get_scale_method()
+  {
+    return (CMPNodeScaleMethod)bnode().custom1;
+  }
+
+  CMPNodeScaleRenderSizeMethod get_scale_render_size_method()
+  {
+    return (CMPNodeScaleRenderSizeMethod)bnode().custom2;
+  }
+
+  float2 get_offset()
+  {
+    return float2(bnode().custom3, bnode().custom4);
   }
 };
 
diff --git a/source/blender/python/intern/bpy_app.c b/source/blender/python/intern/bpy_app.c
index 939473ceaa0..a0129157b95 100644
--- a/source/blender/python/intern/bpy_app.c
+++ b/source/blender/python/intern/bpy_app.c
@@ -79,8 +79,6 @@ static PyStructSequence_Field app_info_fields[] = {
     {"version_string", "The Blender version formatted as a string"},
     {"version_cycle", "The release status of this build alpha/beta/rc/release"},
     {"version_char", "Deprecated, always an empty string"},
-    {"binary_path",
-     "The location of Blender's executable, useful for utilities that open new instances"},
     {"background",
      "Boolean, True when blender is running without a user interface (started with -b)"},
     {"factory_startup", "Boolean, True when blender is running with --factory-startup)"},
@@ -151,7 +149,6 @@ static PyObject *make_app_info(void)
 
   SetStrItem(STRINGIFY(BLENDER_VERSION_CYCLE));
   SetStrItem("");
-  SetStrItem(BKE_appdir_program_path());
   SetObjItem(PyBool_FromLong(G.background));
   SetObjItem(PyBool_FromLong(G.factory_startup));
 
@@ -345,6 +342,33 @@ static PyObject *bpy_app_autoexec_fail_message_get(PyObject *UNUSED(self), void
   return PyC_UnicodeFromByte(G.autoexec_fail);
 }
 
+PyDoc_STRVAR(bpy_app_binary_path_doc,
+             "The location of Blender's executable, useful for utilities that open new instances. "
+             "Read-only unless Blender is built as a Python module - in this case the value is "
+             "an empty string which script authors may point to a Blender binary.");
+static PyObject *bpy_app_binary_path_get(PyObject *UNUSED(self), void *UNUSED(closure))
+{
+  return PyC_UnicodeFromByte(BKE_appdir_program_path());
+}
+
+static int bpy_app_binary_path_set(PyObject *UNUSED(self), PyObject *value, void *UNUSED(closure))
+{
+#ifndef WITH_PYTHON_MODULE
+  PyErr_SetString(PyExc_AttributeError,
+                  "bpy.app.binary_path is only writable when built as a Python module");
+  return -1;
+#endif
+  PyObject *value_coerce = NULL;
+  const char *filepath = PyC_UnicodeAsByte(value, &value_coerce);
+  if (filepath == NULL) {
+    PyErr_Format(PyExc_ValueError, "expected a string or bytes, got %s", Py_TYPE(value)->tp_name);
+    return -1;
+  }
+  BKE_appdir_program_path_init(filepath);
+  Py_XDECREF(value_coerce);
+  return 0;
+}
+
 static PyGetSetDef bpy_app_getsets[] = {
     {"debug", bpy_app_debug_get, bpy_app_debug_set, bpy_app_debug_doc, (void *)G_DEBUG},
     {"debug_ffmpeg",
@@ -450,7 +474,14 @@ static PyGetSetDef bpy_app_getsets[] = {
      (void *)G_FLAG_SCRIPT_AUTOEXEC_FAIL_QUIET},
     {"autoexec_fail_message", bpy_app_autoexec_fail_message_get, NULL, NULL, NULL},
 
-    /* End-of-list marker. */
+    /* Support script authors setting the Blender binary path to use, otherwise this value
+     * is not known when built as a Python module. */
+    {"binary_path",
+     bpy_app_binary_path_get,
+     bpy_app_binary_path_set,
+     bpy_app_binary_path_doc,
+     NULL},
+
     {NULL, NULL, NULL, NULL, NULL},
 };
 
diff --git a/source/blender/render/intern/initrender.cc b/source/blender/render/intern/initrender.cc
index cc05aa8621e..1ea93cbf6c8 100644
--- a/source/blender/render/intern/initrender.cc
+++ b/source/blender/render/intern/initrender.cc
@@ -124,7 +124,8 @@ float RE_filter_value(int type, float x)
       }
       return 1.0f - x;
 
-    case R_FILTER_GAUSS: {
+    case R_FILTER_GAUSS:
+    case R_FILTER_FAST_GAUSS: {
       const float two_gaussfac2 = 2.0f * gaussfac * gaussfac;
       x *= 3.0f * gaussfac;
       return 1.0f / sqrtf((float)M_PI * two_gaussfac2) * expf(-x * x / two_gaussfac2);
diff --git a/source/blender/render/intern/render_result.cc b/source/blender/render/intern/render_result.cc
index 86ee9ad779a..50eb7e9f2d2 100644
--- a/source/blender/render/intern/render_result.cc
+++ b/source/blender/render/intern/render_result.cc
@@ -929,7 +929,11 @@ int render_result_exr_file_read_path(RenderResult *rr,
   return 1;
 }
 
-static void render_result_exr_file_cache_path(Scene *sce, const char *root, char *r_path)
+#define FILE_CACHE_MAX (FILE_MAXFILE + FILE_MAXFILE + MAX_ID_NAME + 100)
+
+static void render_result_exr_file_cache_path(Scene *sce,
+                                              const char *root,
+                                              char r_path[FILE_CACHE_MAX])
 {
   char filename_full[FILE_MAX + MAX_ID_NAME + 100], filename[FILE_MAXFILE], dirname[FILE_MAXDIR];
   char path_digest[16] = {0};
@@ -959,13 +963,17 @@ static void render_result_exr_file_cache_path(Scene *sce, const char *root, char
                filename,
                sce->id.name + 2,
                path_hexdigest);
-  BLI_make_file_string(dirname, r_path, root, filename_full);
+
+  BLI_join_dirfile(r_path, FILE_CACHE_MAX, root, filename_full);
+  if (BLI_path_is_rel(r_path)) {
+    BLI_path_abs(r_path, dirname);
+  }
 }
 
 void render_result_exr_file_cache_write(Render *re)
 {
   RenderResult *rr = re->result;
-  char str[FILE_MAXFILE + FILE_MAXFILE + MAX_ID_NAME + 100];
+  char str[FILE_CACHE_MAX];
   char *root = U.render_cachedir;
 
   render_result_passes_allocated_ensure(rr);
@@ -979,7 +987,7 @@ void render_result_exr_file_cache_write(Render *re)
 bool render_result_exr_file_cache_read(Render *re)
 {
   /* File path to cache. */
-  char filepath[FILE_MAXFILE + MAX_ID_NAME + MAX_ID_NAME + 100] = "";
+  char filepath[FILE_CACHE_MAX] = "";
   char *root = U.render_cachedir;
   render_result_exr_file_cache_path(re->scene, root, filepath);
 
diff --git a/source/blender/windowmanager/intern/wm_files.c b/source/blender/windowmanager/intern/wm_files.c
index 13c1579d24b..186edfe68d6 100644
--- a/source/blender/windowmanager/intern/wm_files.c
+++ b/source/blender/windowmanager/intern/wm_files.c
@@ -1899,7 +1899,7 @@ static bool wm_file_write(bContext *C,
 /** \name Auto-Save API
  * \{ */
 
-static void wm_autosave_location(char *filepath)
+static void wm_autosave_location(char filepath[FILE_MAX])
 {
   const int pid = abs(getpid());
   char path[1024];
@@ -1918,23 +1918,22 @@ static void wm_autosave_location(char *filepath)
     BLI_snprintf(path, sizeof(path), "%d_autosave.blend", pid);
   }
 
+  const char *tempdir_base = BKE_tempdir_base();
 #ifdef WIN32
-  /* XXX Need to investigate how to handle default location of '/tmp/'
-   * This is a relative directory on Windows, and it may be
-   * found. Example:
-   * Blender installed on D:\ drive, D:\ drive has D:\tmp\
-   * Now, BLI_exists() will find '/tmp/' exists, but
-   * BLI_make_file_string will create string that has it most likely on C:\
-   * through BLI_windows_get_default_root_dir().
-   * If there is no C:\tmp autosave fails. */
-  if (!BLI_exists(BKE_tempdir_base())) {
+  /* XXX Need to investigate how to handle default location of `/tmp/`
+   * This is a relative directory on Windows, and it may be found. Example:
+   * Blender installed on `D:\` drive, `D:\` drive has `D:\tmp\` Now, `BLI_exists()`
+   * will find `/tmp/` exists, but  #BLI_windows_get_default_root_dir will expand this to `C:\`.
+   * If there is no `C:\tmp` autosave fails. */
+  if (!BLI_exists(tempdir_base)) {
     const char *savedir = BKE_appdir_folder_id_create(BLENDER_USER_AUTOSAVE, NULL);
-    BLI_make_file_string("/", filepath, savedir, path);
-    return;
+    if (savedir) {
+      tempdir_base = savedir;
+    }
   }
 #endif
 
-  BLI_join_dirfile(filepath, FILE_MAX, BKE_tempdir_base(), path);
+  BLI_join_dirfile(filepath, FILE_MAX, tempdir_base, path);
 }
 
 static void wm_autosave_write(Main *bmain, wmWindowManager *wm)
diff --git a/source/blender/windowmanager/intern/wm_init_exit.c b/source/blender/windowmanager/intern/wm_init_exit.c
index 8163b39b3dd..283b87f1a2f 100644
--- a/source/blender/windowmanager/intern/wm_init_exit.c
+++ b/source/blender/windowmanager/intern/wm_init_exit.c
@@ -634,13 +634,15 @@ void WM_exit_ex(bContext *C, const bool do_python)
   BKE_sound_exit();
 
   BKE_appdir_exit();
-  CLG_exit();
 
   BKE_blender_atexit();
 
   wm_autosave_delete();
 
   BKE_tempdir_session_purge();
+
+  /* Keep last (or near last) so logging can be used right up until everything is shut-down. */
+  CLG_exit();
 }
 
 void WM_exit(bContext *C)
diff --git a/source/creator/CMakeLists.txt b/source/creator/CMakeLists.txt
index 0e9c3a853aa..f8cbb9bc07c 100644
--- a/source/creator/CMakeLists.txt
+++ b/source/creator/CMakeLists.txt
@@ -26,9 +26,8 @@ if(HAVE_FEENABLEEXCEPT)
 endif()
 
 if(WITH_TBB)
-  # Force TBB libraries to be in front of MKL (part of OpenImageDenoise), so
-  # that it is initialized before MKL and static library initialization order
-  # issues are avoided.
+  # Force TBB libraries to be in front of MKL (part of `OpenImageDenoise`), so
+  # that it is initialized before MKL and static library initialization order issues are avoided.
   #
   # This isn't fully robust but seems to work.
   list(INSERT LIB 0 ${TBB_LIBRARIES})
@@ -58,7 +57,7 @@ endif()
 if(WITH_TBB)
   blender_include_dirs(${TBB_INCLUDE_DIRS})
   if(WIN32)
-    # For pragma that links tbbmalloc_proxy.lib
+    # For `pragma` that links `tbbmalloc_proxy.lib`.
     link_directories(${LIBDIR}/tbb/lib)
   endif()
 endif()
@@ -108,7 +107,7 @@ if(WITH_OPENCOLORIO)
   add_definitions(-DWITH_OCIO)
 endif()
 
-# Setup the exe sources and buildinfo
+# Setup the EXE sources and `buildinfo`.
 set(SRC
   creator.c
   creator_args.c
@@ -117,7 +116,7 @@ set(SRC
   creator_intern.h
 )
 
-# MSVC 2010 gives linking errors with the manifest
+# MSVC 2010 gives linking errors with the manifest.
 if(WIN32 AND NOT UNIX)
   add_definitions(
     -DBLEN_VER_RC_STR="${BLENDER_VERSION}"
@@ -173,19 +172,20 @@ if(WITH_BUILDINFO)
   unset(BUILD_SYSTEM)
 
   # --------------------------------------------------------------------------
-  # write header for values that change each build
-  # note, generated file is in build dir's source/creator
-  #       except when used as an include path.
+  # Write header for values that change each build
+  #
+  # NOTE: generated file is in build directory `source/creator`
+  # except when used as an include path.
 
   add_definitions(-DWITH_BUILDINFO_HEADER)
 
-  # include the output directory, where the buildinfo.h file is generated
+  # Include the output directory, where the `buildinfo.h` file is generated.
   include_directories(${CMAKE_CURRENT_BINARY_DIR})
 
 
-  # XXX, ${buildinfo_h_fake} is used here,
+  # XXX: `${buildinfo_h_fake}` is used here,
   # because we rely on that file being detected as missing
-  # every build so that the real header "buildinfo.h" is updated.
+  # every build so that the real header `buildinfo.h` is updated.
   #
   # Keep this until we find a better way to resolve!
 
@@ -193,14 +193,18 @@ if(WITH_BUILDINFO)
   set(buildinfo_h_fake "${CMAKE_CURRENT_BINARY_DIR}/buildinfo.h_fake")
 
   if(EXISTS ${buildinfo_h_fake})
-    message(FATAL_ERROR "File \"${buildinfo_h_fake}\" found, this should never be created, remove!")
+    message(
+      FATAL_ERROR
+      "File \"${buildinfo_h_fake}\" found, this should never be created, remove!"
+    )
   endif()
 
-  # From the cmake documentation "If the output of the custom command is not actually created as a
+  # From the CMAKE documentation "If the output of the custom command is not actually created as a
   # file on disk it should be marked with the SYMBOLIC source file property."
   #
-  # Not doing this leads to build warnings for the not generated file on windows when using msbuild
-  SET_SOURCE_FILES_PROPERTIES(${buildinfo_h_fake} PROPERTIES SYMBOLIC TRUE)
+  # Not doing this leads to build warnings for the not generated file on
+  # MS-Windows when using `msbuild`.
+  set_source_files_properties(${buildinfo_h_fake} PROPERTIES SYMBOLIC TRUE)
 
   # a custom target that is always built
   add_custom_target(
@@ -208,19 +212,21 @@ if(WITH_BUILDINFO)
     DEPENDS ${buildinfo_h_fake}
   )
 
-  # creates buildinfo.h using cmake script
+  # Creates `buildinfo.h` using CMAKE script.
   add_custom_command(
     OUTPUT
       ${buildinfo_h_fake}  # ensure we always run
       ${buildinfo_h_real}
-    COMMAND ${CMAKE_COMMAND}
-    -DSOURCE_DIR=${CMAKE_SOURCE_DIR}
-    # overrides only used when non-empty strings
-    -DBUILD_DATE=${BUILDINFO_OVERRIDE_DATE}
-    -DBUILD_TIME=${BUILDINFO_OVERRIDE_TIME}
-    -P ${CMAKE_SOURCE_DIR}/build_files/cmake/buildinfo.cmake)
-
-  # buildinfo.h is a generated file
+    COMMAND
+      ${CMAKE_COMMAND}
+      -DSOURCE_DIR=${CMAKE_SOURCE_DIR}
+      # Overrides only used when non-empty strings.
+      -DBUILD_DATE=${BUILDINFO_OVERRIDE_DATE}
+      -DBUILD_TIME=${BUILDINFO_OVERRIDE_TIME}
+      -P ${CMAKE_SOURCE_DIR}/build_files/cmake/buildinfo.cmake
+    )
+
+  # `buildinfo.h` is a generated file.
   set_source_files_properties(
     ${buildinfo_h_real}
     PROPERTIES GENERATED TRUE
@@ -229,7 +235,7 @@ if(WITH_BUILDINFO)
   unset(buildinfo_h_real)
   unset(buildinfo_h_fake)
 
-  # add deps below, after adding blender
+  # Add dependencies below, after adding Blender
   # -------------- done with header values.
 
   list(APPEND SRC
@@ -247,26 +253,35 @@ add_cc_flags_custom_test(blender)
 if(WITH_PYTHON_MODULE)
   add_definitions(-DWITH_PYTHON_MODULE)
 
-  # creates ./bin/bpy.so which can be imported as a python module.
+  # Creates `./bpy/__init__.so` which can be imported as a Python module.
   #
-  # note that 'SHARED' works on Linux and Windows,
-  # but not OSX which _must_ be 'MODULE'
+  # Note that 'SHARED' works on Linux and Windows, but not MACOS which _must_ be 'MODULE'.
   add_library(blender MODULE ${SRC})
+
+
+  get_property(GENERATOR_IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
+  if(GENERATOR_IS_MULTI_CONFIG)
+    set(BPY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin/$<CONFIG>/bpy)
+  else()
+    set(BPY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin/bpy)
+  endif()
+
   set_target_properties(
     blender
     PROPERTIES
       PREFIX ""
-      OUTPUT_NAME bpy
-      LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin
-      RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin  # only needed on windows
+      OUTPUT_NAME __init__
+      LIBRARY_OUTPUT_DIRECTORY ${BPY_OUTPUT_DIRECTORY}
+      RUNTIME_OUTPUT_DIRECTORY ${BPY_OUTPUT_DIRECTORY}
   )
+  unset(BPY_OUTPUT_DIRECTORY)
 
   if(APPLE)
     set_target_properties(blender PROPERTIES MACOSX_BUNDLE TRUE)
   endif()
 
   if(WIN32)
-    # python modules use this
+    # Python modules use this.
     set_target_properties(
       blender
       PROPERTIES
@@ -288,31 +303,33 @@ else()
 endif()
 
 if(WITH_BUILDINFO)
-  # explicitly say that the executable depends on the buildinfo
+  # Explicitly say that the executable depends on the `buildinfo`.
   add_dependencies(blender buildinfo)
 endif()
 
 
 set(BLENDER_TEXT_FILES
   ${CMAKE_SOURCE_DIR}/release/text/copyright.txt
-  # generate this file
-  # ${CMAKE_SOURCE_DIR}/release/text/readme.html
+  # Generate this file:
+  # `${CMAKE_SOURCE_DIR}/release/text/readme.html`
 )
 
 
 # -----------------------------------------------------------------------------
-# Platform specific target destinations for version dir, libs, bpy, text files.
+# Platform specific target destinations
+#
+# Setup version directory, libraries, `bpy` & text files.
 
 if(UNIX AND NOT APPLE)
   if(WITH_PYTHON_MODULE)
     if(WITH_INSTALL_PORTABLE)
-      set(TARGETDIR_BPY .)
-      set(TARGETDIR_VER ${BLENDER_VERSION})
-      set(TARGETDIR_LIB lib)
+      set(TARGETDIR_BPY bpy)
+      set(TARGETDIR_VER bpy/${BLENDER_VERSION})
+      set(TARGETDIR_LIB bpy/lib)
     else()
-      set(TARGETDIR_BPY ${PYTHON_SITE_PACKAGES})
-      set(TARGETDIR_VER ${PYTHON_SITE_PACKAGES}/${BLENDER_VERSION})
-      set(TARGETDIR_LIB ${PYTHON_SITE_PACKAGES}/lib)
+      set(TARGETDIR_BPY ${PYTHON_SITE_PACKAGES}/bpy)
+      set(TARGETDIR_VER ${PYTHON_SITE_PACKAGES}/bpy/${BLENDER_VERSION})
+      set(TARGETDIR_LIB ${PYTHON_SITE_PACKAGES}/bpy/lib)
     endif()
   else()
     if(WITH_INSTALL_PORTABLE)
@@ -326,21 +343,28 @@ if(UNIX AND NOT APPLE)
   endif()
 
 elseif(WIN32)
-  set(TARGETDIR_VER ${BLENDER_VERSION})
-  set(TARGETDIR_TEXT .)
-  set(TARGETDIR_LIB .)
-
+  if(WITH_PYTHON_MODULE)
+    set(TARGETDIR_BPY $<TARGET_FILE_DIR:blender>)
+    set(TARGETDIR_VER $<TARGET_FILE_DIR:blender>/${BLENDER_VERSION})
+    # Important the DLL's are next to `__init__.pyd` otherwise it won't load.
+    set(TARGETDIR_LIB $<TARGET_FILE_DIR:blender>)
+  else()
+    set(TARGETDIR_VER ${BLENDER_VERSION})
+    set(TARGETDIR_TEXT .)
+    set(TARGETDIR_LIB .)
+  endif()
 elseif(APPLE)
   if(WITH_PYTHON_MODULE)
     if(WITH_INSTALL_PORTABLE)
-      set(TARGETDIR_VER $<TARGET_FILE_DIR:blender>/../Resources/${BLENDER_VERSION})
-      set(TARGETDIR_LIB lib)
+      set(TARGETDIR_BPY bpy)
+      set(TARGETDIR_VER bpy/${BLENDER_VERSION})
+      set(TARGETDIR_LIB bpy/lib)
     else()
       # Paths defined in terms of site-packages since the site-packages
       # directory can be a symlink (brew for example).
-      set(TARGETDIR_BPY ${PYTHON_LIBPATH}/site-packages)
-      set(TARGETDIR_VER ${TARGETDIR_BPY}/../Resources/${BLENDER_VERSION})
-      set(TARGETDIR_LIB ${TARGETDIR_BPY}/lib)
+      set(TARGETDIR_BPY ${PYTHON_LIBPATH}/site-packages/bpy)
+      set(TARGETDIR_VER ${PYTHON_LIBPATH}/site-packages/bpy/${BLENDER_VERSION})
+      set(TARGETDIR_LIB ${PYTHON_LIBPATH}/site-packages/bpy/lib)
     endif()
   else()
     set(TARGETDIR_VER Blender.app/Contents/Resources/${BLENDER_VERSION})
@@ -348,7 +372,7 @@ elseif(APPLE)
     set(TARGETDIR_TEXT Blender.app/Contents/Resources/text)
   endif()
 
-  # Skip relinking on cpack / install
+  # Skip re-linking on CPACK / install.
   set_target_properties(blender PROPERTIES BUILD_WITH_INSTALL_RPATH true)
 endif()
 
@@ -371,14 +395,14 @@ if(WITH_PYTHON)
      "${BLENDER_VERSION_CYCLE}" STREQUAL "rc")
     set(ADDON_EXCLUDE_CONDITIONAL "addons_contrib/*")
   else()
-    set(ADDON_EXCLUDE_CONDITIONAL "_addons_contrib/*")  # dummy, won't do anything
+    set(ADDON_EXCLUDE_CONDITIONAL "_addons_contrib/*")  # Dummy, won't do anything.
   endif()
 
   # do not install freestyle dir if disabled
   if(NOT WITH_FREESTYLE)
     set(FREESTYLE_EXCLUDE_CONDITIONAL "freestyle/*")
   else()
-    set(FREESTYLE_EXCLUDE_CONDITIONAL "_freestyle/*")  # dummy, won't do anything
+    set(FREESTYLE_EXCLUDE_CONDITIONAL "_freestyle/*")  # Dummy, won't do anything.
   endif()
 
   install(
@@ -398,8 +422,7 @@ endif()
 
 # fonts
 install(
-  DIRECTORY
-    ${CMAKE_SOURCE_DIR}/release/datafiles/fonts
+  DIRECTORY ${CMAKE_SOURCE_DIR}/release/datafiles/fonts
   DESTINATION ${TARGETDIR_VER}/datafiles
 )
 
@@ -413,14 +436,14 @@ if(WITH_INTERNATIONAL)
     msgfmt_simple(${_po_file} _all_mo_files)
   endforeach()
 
-  # Create a custom target which will compile all po to mo
+  # Create a custom target which will compile all `*.po` to `*.mo`.
   add_custom_target(
     locales
     DEPENDS ${_all_mo_files}
   )
   add_dependencies(blender locales)
 
-  # Generate INSTALL rules
+  # Generate INSTALL rules.
   install(
     FILES ${_locale_dir}/languages
     DESTINATION ${_locale_target_dir}
@@ -445,7 +468,7 @@ if(WITH_INTERNATIONAL)
   unset(_locale_dir)
 endif()
 
-# color management
+# Color management.
 if(WITH_OPENCOLORIO)
   install(
     DIRECTORY ${CMAKE_SOURCE_DIR}/release/datafiles/colormanagement
@@ -453,13 +476,14 @@ if(WITH_OPENCOLORIO)
   )
 endif()
 
-# helpful tip when using make
+# Helpful tip when using make.
 if("${CMAKE_GENERATOR}" MATCHES ".*Makefiles.*")
-  # message after building.
+  # Message to display after building.
   add_custom_command(
     TARGET blender POST_BUILD MAIN_DEPENDENCY blender
-    COMMAND ${CMAKE_COMMAND} -E
-            echo 'now run: \"make install\" to copy runtime files and scripts to ${TARGETDIR_VER}'
+    COMMAND
+      ${CMAKE_COMMAND} -E
+      echo 'now run: \"make install\" to copy runtime files and scripts to ${TARGETDIR_VER}'
   )
 endif()
 
@@ -473,9 +497,10 @@ if(UNIX AND NOT APPLE)
     if(WITH_DOC_MANPAGE)
       add_custom_target(
         blender_man_page ALL
-        COMMAND ${CMAKE_SOURCE_DIR}/doc/manpage/blender.1.py
-                --blender ${EXECUTABLE_OUTPUT_PATH}/blender
-                --output ${CMAKE_CURRENT_BINARY_DIR}/blender.1
+        COMMAND
+          ${CMAKE_SOURCE_DIR}/doc/manpage/blender.1.py
+          --blender ${EXECUTABLE_OUTPUT_PATH}/blender
+          --output ${CMAKE_CURRENT_BINARY_DIR}/blender.1
       )
       add_dependencies(blender_man_page blender)
     endif()
@@ -488,7 +513,7 @@ if(UNIX AND NOT APPLE)
     )
   endif()
 
-  # there are a few differences between portable and system install
+  # There are a few differences between portable and system install.
   if(WITH_PYTHON_MODULE)
     if(WITH_INSTALL_PORTABLE)
       install(
@@ -561,14 +586,14 @@ if(UNIX AND NOT APPLE)
       DESTINATION bin
     )
     if(WITH_DOC_MANPAGE)
-      # manpage only with 'blender' binary
+      # Manual page (only with `blender` binary).
       install(
         FILES ${CMAKE_CURRENT_BINARY_DIR}/blender.1
         DESTINATION share/man/man1
       )
     endif()
 
-    # misc files
+    # Misc files.
     install(
       FILES ${CMAKE_SOURCE_DIR}/release/freedesktop/blender.desktop
       DESTINATION share/applications
@@ -597,11 +622,9 @@ if(UNIX AND NOT APPLE)
         DESTINATION ${TARGETDIR_VER}/python/bin
       )
 
-      # on some platforms (like openSUSE) Python is linked
-      # to be used from lib64 folder.
-      # determine this from Python's libraries path
-      #
-      # ugh, its possible 'lib64' is just a symlink to 'lib' which causes incorrect use of 'lib64'
+      # On some platforms (like openSUSE) Python is linked to be used from `lib64` directory.
+      # determine this from Python's libraries path.
+      # Ugh, its possible `lib64` is just a symlink to 'lib' which causes incorrect use of `lib64`.
       get_filename_component(_pypath_real ${PYTHON_LIBPATH} REALPATH)
       if(${_pypath_real} MATCHES "lib64$")
         set(_target_LIB "lib64")
@@ -610,7 +633,7 @@ if(UNIX AND NOT APPLE)
       endif()
       unset(_pypath_real)
 
-      # Copy the systems python into the install directory
+      # Copy the systems python into the install directory:
       # install(CODE "message(\"copying a subset of the systems python...\")")
       install(
         DIRECTORY ${PYTHON_LIBPATH}/python${PYTHON_VERSION}
@@ -628,8 +651,8 @@ if(UNIX AND NOT APPLE)
         PATTERN "wininst*.exe" EXCLUDE              # from distutils, avoid malware false positive
       )
 
-      # Needed for distutils/pip
-      # get the last part of the include dir, will be 'python{version}{abiflag}',
+      # Needed for `distutils/pip`.
+      # Get the last part of the include dir, will be `python{version}{abiflag}`.
       get_filename_component(_py_inc_suffix ${PYTHON_INCLUDE_DIR} NAME)
       install(
         FILES ${PYTHON_INCLUDE_DIR}/pyconfig.h
@@ -639,7 +662,7 @@ if(UNIX AND NOT APPLE)
 
       if(WITH_PYTHON_INSTALL_NUMPY)
         # Install to the same directory as the source, so debian-like
-        # distros are happy with their policy.
+        # distributions are happy with their policy.
         set(_suffix "site-packages")
         if(${PYTHON_NUMPY_PATH} MATCHES "dist-packages")
           set(_suffix "dist-packages")
@@ -676,7 +699,7 @@ if(UNIX AND NOT APPLE)
 
       if(WITH_PYTHON_INSTALL_ZSTANDARD)
         # Install to the same directory as the source, so debian-like
-        # distros are happy with their policy.
+        # distributions are happy with their policy.
         set(_suffix "site-packages")
         if(${PYTHON_ZSTANDARD_PATH} MATCHES "dist-packages")
           set(_suffix "dist-packages")
@@ -692,7 +715,7 @@ if(UNIX AND NOT APPLE)
         unset(_suffix)
       endif()
 
-      # Copy requests, we need to generalize site-packages
+      # Copy requests, we need to generalize site-packages.
       if(WITH_PYTHON_INSTALL_REQUESTS)
         set(_suffix "site-packages")
         if(${PYTHON_REQUESTS_PATH} MATCHES "dist-packages")
@@ -708,9 +731,8 @@ if(UNIX AND NOT APPLE)
         )
         # On some platforms requests does have extra dependencies.
         #
-        # Either 'chardet' or 'charset_normalizer" is used, depending on the
-        # version of Python. The code below silently skips the one that's not
-        # available, so we can just list both here.
+        # Either `chardet` or `charset_normalizer` is used, depending on the version of Python.
+        # The code below silently skips the one that's not available, so we can list both here.
         set(_requests_deps "certifi" "chardet" "charset_normalizer" "idna" "urllib3")
         foreach(_requests_dep ${_requests_deps})
           if(EXISTS ${PYTHON_REQUESTS_PATH}/${_requests_dep})
@@ -765,11 +787,16 @@ elseif(WIN32)
     )
   endif()
   if(MSVC_ASAN)
-    # The asan dll's can be found in the same folder as the compiler, this is the easiest way to find these.
+    # The ASAN DLL's can be found in the same folder as the compiler,
+    # this is the easiest way to find these.
     string(REPLACE "cl.exe" "clang_rt.asan_dynamic-x86_64.dll" ASAN_DLL ${CMAKE_C_COMPILER})
     string(REPLACE "cl.exe" "clang_rt.asan_dbg_dynamic-x86_64.dll" ASAN_DEBUG_DLL ${CMAKE_C_COMPILER})
     if(NOT EXISTS "${ASAN_DLL}")
-      message(FATAL_ERROR "Asan is enabled, but the ASAN runtime is not detected, this is an optional component during the MSVC install, please install it")
+      message(
+        FATAL_ERROR
+        "ASAN is enabled, but the ASAN runtime is not detected, "
+        "this is an optional component during the MSVC install, please install it"
+      )
     endif()
     install(
       FILES ${ASAN_DLL}
@@ -804,10 +831,14 @@ elseif(WIN32)
 
   if(WITH_WINDOWS_PDB)
     if(WITH_WINDOWS_STRIPPED_PDB)
-      # Icky hack for older cmake from https://stackoverflow.com/a/21198501
-      # $<CONFIG> will work in newer cmake but the version currently (3.12)
-      # on the buildbot does not support this endavour.
-      install(FILES ${CMAKE_CURRENT_BINARY_DIR}/\${CMAKE_INSTALL_CONFIG_NAME}/blender_public.pdb DESTINATION . RENAME blender.pdb)
+      # Icky hack for older CMAKE from https://stackoverflow.com/a/21198501
+      # `$<CONFIG>` will work in newer CMAKE but the version currently (3.12)
+      # on the build-bot does not support this endeavor.
+      install(
+        FILES ${CMAKE_CURRENT_BINARY_DIR}/\${CMAKE_INSTALL_CONFIG_NAME}/blender_public.pdb
+        DESTINATION .
+        RENAME blender.pdb
+      )
     else()
       install(FILES $<TARGET_PDB_FILE:blender> DESTINATION . RENAME blender.pdb)
     endif()
@@ -829,24 +860,29 @@ elseif(WIN32)
   if(WITH_PYTHON)
     string(REPLACE "." "" _PYTHON_VERSION_NO_DOTS ${PYTHON_VERSION})
 
-    if(NOT CMAKE_COMPILER_IS_GNUCC)
-      install(
-        FILES ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python${_PYTHON_VERSION_NO_DOTS}.dll
-              ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python3.dll
-        DESTINATION ${TARGETDIR_LIB}
-        CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel
-      )
+    if(NOT WITH_PYTHON_MODULE)
+      if(NOT CMAKE_COMPILER_IS_GNUCC)
+        install(
+          FILES
+            ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python${_PYTHON_VERSION_NO_DOTS}.dll
+            ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python3.dll
+          DESTINATION ${TARGETDIR_LIB}
+          CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel
+        )
 
-      install(
-        FILES ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python${_PYTHON_VERSION_NO_DOTS}_d.dll
-              ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python3_d.dll
-        DESTINATION ${TARGETDIR_LIB}
-        CONFIGURATIONS Debug
-      )
+        install(
+          FILES
+            ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python${_PYTHON_VERSION_NO_DOTS}_d.dll
+            ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python3_d.dll
+          DESTINATION ${TARGETDIR_LIB}
+          CONFIGURATIONS Debug
+        )
+      endif()
     endif()
 
     if(WITH_PYTHON_INSTALL)
-      # note, as far as python is concerned 'RelWithDebInfo' is not debug since its without debug flags.
+      # NOTE: as far as python is concerned `RelWithDebInfo`
+      # is not debug since its without debug flags.
 
       install(DIRECTORY DESTINATION ${TARGETDIR_VER}/python)
       install(DIRECTORY DESTINATION ${TARGETDIR_VER}/python/lib)
@@ -856,7 +892,7 @@ elseif(WIN32)
         DESTINATION ${BLENDER_VERSION}/python/
         CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel
         PATTERN ".svn" EXCLUDE
-        PATTERN "*_d.*" EXCLUDE                  # * debug libraries *
+        PATTERN "*_d.*" EXCLUDE                 # * debug libraries *
         PATTERN "__pycache__" EXCLUDE           # * any cache *
         PATTERN "*.pyc" EXCLUDE                 # * any cache *
         PATTERN "*.pyo" EXCLUDE                 # * any cache *
@@ -887,27 +923,31 @@ elseif(WIN32)
       )
 
       install(
-        FILES ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python${_PYTHON_VERSION_NO_DOTS}.dll
-              ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python.exe
+        FILES
+          ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python${_PYTHON_VERSION_NO_DOTS}.dll
+          ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python.exe
         DESTINATION ${BLENDER_VERSION}/python/bin
         CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel
       )
       install(
-        FILES ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python${_PYTHON_VERSION_NO_DOTS}_d.dll
-              ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python_d.exe
+        FILES
+          ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python${_PYTHON_VERSION_NO_DOTS}_d.dll
+          ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/bin/python_d.exe
         DESTINATION ${BLENDER_VERSION}/python/bin
         CONFIGURATIONS Debug
       )
 
       if(WINDOWS_PYTHON_DEBUG)
         install(
-          FILES ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/libs/python${_PYTHON_VERSION_NO_DOTS}.pdb
+          FILES
+            ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/libs/python${_PYTHON_VERSION_NO_DOTS}.pdb
           DESTINATION ${TARGETDIR_LIB}
           CONFIGURATIONS Release;RelWithDebInfo;MinSizeRel
         )
 
         install(
-          FILES ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/libs/python${_PYTHON_VERSION_NO_DOTS}_d.pdb
+          FILES
+            ${LIBDIR}/python/${_PYTHON_VERSION_NO_DOTS}/libs/python${_PYTHON_VERSION_NO_DOTS}_d.pdb
           DESTINATION ${TARGETDIR_LIB}
           CONFIGURATIONS Debug
         )
@@ -918,9 +958,8 @@ elseif(WIN32)
   endif()
 
   if(WITH_CODEC_FFMPEG)
-    # Filenames change slightly between ffmpeg versions
-    # check both 5.0 and fallback to 4.4 to ease the transition
-    # between versions.
+    # Filenames change slightly between FFMPEG versions check both 5.0 and fallback to 4.4
+    # to ease the transition between versions.
     if(EXISTS "${LIBDIR}/ffmpeg/lib/avcodec-59.dll")
       install(
         FILES
@@ -1009,16 +1048,19 @@ elseif(WIN32)
     )
   endif()
 
-  install(
-    FILES
-      ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_debug_gpu.cmd
-      ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_debug_gpu_glitchworkaround.cmd
-      ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_debug_log.cmd
-      ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_factory_startup.cmd
-      ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_oculus.cmd
-      ${CMAKE_SOURCE_DIR}/release/windows/batch/oculus.json
-    DESTINATION ${TARGETDIR_LIB}
-  )
+
+  if(NOT WITH_PYTHON_MODULE)
+    install(
+      FILES
+        ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_debug_gpu.cmd
+        ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_debug_gpu_glitchworkaround.cmd
+        ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_debug_log.cmd
+        ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_factory_startup.cmd
+        ${CMAKE_SOURCE_DIR}/release/windows/batch/blender_oculus.cmd
+        ${CMAKE_SOURCE_DIR}/release/windows/batch/oculus.json
+      DESTINATION ${TARGETDIR_LIB}
+    )
+  endif()
 
   if(WITH_BLENDER_THUMBNAILER)
     install(
@@ -1035,12 +1077,12 @@ elseif(WIN32)
   endif()
 elseif(APPLE)
   if(NOT WITH_PYTHON_MODULE)
-    # Uppercase name for app bundle
+    # Uppercase name for app bundle.
     set_target_properties(blender PROPERTIES OUTPUT_NAME Blender)
   endif()
 
-  # handy install macro to exclude files, we use \$ escape for the "to"
-  # argument when calling so ${BUILD_TYPE} does not get expanded
+  # Handy install macro to exclude files, we use \$ escape for the "to"
+  # argument when calling so `${BUILD_TYPE}` does not get expanded.
   macro(install_dir from to)
     install(
       DIRECTORY ${from}
@@ -1068,10 +1110,12 @@ elseif(APPLE)
 
   set(OSX_APP_SOURCEDIR ${CMAKE_SOURCE_DIR}/release/darwin/Blender.app)
 
-  # setup Info.plist
-  execute_process(COMMAND date "+%Y-%m-%d"
-                  OUTPUT_VARIABLE BLENDER_DATE
-                  OUTPUT_STRIP_TRAILING_WHITESPACE)
+  # Setup `Info.plist`.
+  execute_process(
+    COMMAND date "+%Y-%m-%d"
+    OUTPUT_VARIABLE BLENDER_DATE
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
 
   set_target_properties(blender PROPERTIES
     MACOSX_BUNDLE_INFO_PLIST ${OSX_APP_SOURCEDIR}/Contents/Info.plist
@@ -1079,19 +1123,22 @@ elseif(APPLE)
     MACOSX_BUNDLE_LONG_VERSION_STRING "${BLENDER_VERSION}.${BLENDER_VERSION_PATCH} ${BLENDER_DATE}"
   )
 
-  # Gather the date in finder-style
-  execute_process(COMMAND date "+%m/%d/%Y/%H:%M"
-  OUTPUT_VARIABLE SETFILE_DATE
-  OUTPUT_STRIP_TRAILING_WHITESPACE)
+  # Gather the date in finder-style.
+  execute_process(
+    COMMAND date "+%m/%d/%Y/%H:%M"
+    OUTPUT_VARIABLE SETFILE_DATE
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+  )
 
-  # Give the bundle actual creation/modification date
+  # Give the bundle actual creation/modification date.
   #
-  # Note that the directory might not yet exist, which happens when CMake is first run.
+  # Note that the directory might not yet exist, which happens when CMAKE is first run.
   if(NOT EXISTS ${EXECUTABLE_OUTPUT_PATH}/Blender.app)
     file(MAKE_DIRECTORY ${EXECUTABLE_OUTPUT_PATH}/Blender.app)
   endif()
-  execute_process(COMMAND SetFile -d ${SETFILE_DATE} -m ${SETFILE_DATE}
-                  ${EXECUTABLE_OUTPUT_PATH}/Blender.app)
+  execute_process(
+    COMMAND SetFile -d ${SETFILE_DATE} -m ${SETFILE_DATE} ${EXECUTABLE_OUTPUT_PATH}/Blender.app
+  )
 
   install(
     TARGETS blender
@@ -1122,9 +1169,9 @@ elseif(APPLE)
     )
   endif()
 
-  # python
+  # Python.
   if(WITH_PYTHON AND NOT WITH_PYTHON_MODULE AND NOT WITH_PYTHON_FRAMEWORK)
-    # Copy the python libs into the install directory
+    # Copy the python libraries into the install directory.
     install_dir(
       ${PYTHON_LIBPATH}
       ${TARGETDIR_VER}/python/lib
@@ -1136,8 +1183,8 @@ elseif(APPLE)
       DESTINATION ${TARGETDIR_VER}/python/bin
     )
 
-    # Needed for distutils/pip
-    # get the last part of the include dir, will be 'python{version}{abiflag}',
+    # Needed for `distutils/pip`.
+    # Get the last part of the include dir, will be `python{version}{abiflag}`.
     get_filename_component(_py_inc_suffix ${PYTHON_INCLUDE_DIR} NAME)
     install(
       FILES ${PYTHON_INCLUDE_DIR}/pyconfig.h
@@ -1181,13 +1228,12 @@ if(DEFINED TARGETDIR_TEXT)
   )
 
   install(
-    DIRECTORY
-    ${CMAKE_SOURCE_DIR}/release/license
+    DIRECTORY ${CMAKE_SOURCE_DIR}/release/license
     DESTINATION "${TARGETDIR_TEXT}"
 )
 endif()
 
-# install more files specified elsewhere
+# Install more files specified elsewhere.
 delayed_do_install(${TARGETDIR_VER})
 
 unset(BLENDER_TEXT_FILES)
@@ -1214,16 +1260,18 @@ unset(_icon_names)
 unset(_icon_files)
 unset(_f)
 
+
 # -----------------------------------------------------------------------------
 # Studio Lights
+
 install(
-  DIRECTORY
-    ${CMAKE_SOURCE_DIR}/release/datafiles/studiolights
+  DIRECTORY ${CMAKE_SOURCE_DIR}/release/datafiles/studiolights
   DESTINATION ${TARGETDIR_VER}/datafiles
 )
 
+
 # -----------------------------------------------------------------------------
-# Setup link libs
+# Setup link libraries
 
 add_dependencies(blender makesdna)
 target_link_libraries(blender ${LIB})
@@ -1236,22 +1284,23 @@ if(DEFINED PLATFORM_SYMBOLS_MAP)
   set_target_properties(blender PROPERTIES LINK_DEPENDS ${PLATFORM_SYMBOLS_MAP})
 endif()
 
+
 # -----------------------------------------------------------------------------
 # USD registry.
-# USD requires a set of JSON files that define the standard schemas. These
-# files are required at runtime.
+
+# USD requires a set of JSON files that define the standard schemas.
+# These files are required at runtime.
 if(WITH_USD)
   add_definitions(-DWITH_USD)
-  install(DIRECTORY
-    ${USD_LIBRARY_DIR}/usd
+  install(
+    DIRECTORY ${USD_LIBRARY_DIR}/usd
     DESTINATION "${TARGETDIR_VER}/datafiles"
   )
 endif()
 
 
-# vcpkg substitutes our libs with theirs, which will cause issues when you
-# you run these builds on other systems due to missing dlls. So we opt out
-# the use of vcpkg
+# `vcpkg` substitutes our libraries with theirs, which will cause issues when you you run
+# these builds on other systems due to missing DLL's. So we opt out the use of `vcpkg`.
 if(WIN32)
   set_target_properties(blender PROPERTIES VS_GLOBAL_VcpkgEnabled "false")
   set_target_properties(blender PROPERTIES
@@ -1261,12 +1310,18 @@ if(WIN32)
   if(WITH_WINDOWS_PDB AND WITH_WINDOWS_STRIPPED_PDB)
     # This is slightly messy, but single target generators like ninja will not have the
     # `CMAKE_CFG_INTDIR` variable and multi-target generators like `msbuild` will not have
-    # `CMAKE_BUILD_TYPE`. This can be simplified by target_link_options and the `$<CONFIG>`
+    # `CMAKE_BUILD_TYPE`. This can be simplified by `target_link_options` and the `$<CONFIG>`
     # generator expression in newer CMAKE (2.13+) but until that time this fill have suffice.
     if(CMAKE_BUILD_TYPE)
-      set_property(TARGET blender APPEND_STRING PROPERTY LINK_FLAGS  " /PDBSTRIPPED:${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_BUILD_TYPE}/blender_public.pdb")
+      set_property(
+        TARGET blender APPEND_STRING PROPERTY LINK_FLAGS
+        " /PDBSTRIPPED:${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_BUILD_TYPE}/blender_public.pdb"
+      )
     else()
-      set_property(TARGET blender APPEND_STRING PROPERTY LINK_FLAGS  " /PDBSTRIPPED:${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/blender_public.pdb")
+      set_property(
+        TARGET blender APPEND_STRING PROPERTY LINK_FLAGS
+        " /PDBSTRIPPED:${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR}/blender_public.pdb"
+      )
     endif()
   endif()
 endif()
diff --git a/source/creator/creator.c b/source/creator/creator.c
index e7e9eeed79a..7f236a39974 100644
--- a/source/creator/creator.c
+++ b/source/creator/creator.c
@@ -396,17 +396,7 @@ int main(int argc,
 #endif
 
   /* Initialize path to executable. */
-  {
-#ifdef WITH_PYTHON_MODULE
-    /* NOTE(@campbellbarton): Always use `argv[0]` as is, when building as a Python module.
-     * Otherwise other methods of detecting the binary that override this argument
-     * which must point to the Python module for data-files to be detected. */
-    const bool strict = true;
-#else
-    const bool strict = false;
-#endif
-    BKE_appdir_program_path_init(argv[0], strict);
-  }
+  BKE_appdir_program_path_init(argv[0]);
 
   BLI_threadapi_init();