Cycles: glossy and anisotropic BSDF changes

* Anisotropic BSDF now supports GGX and Beckmann distributions, Ward has been
  removed because other distributions are superior.
* GGX is now the default distribution for all glossy and anisotropic nodes,
  since it looks good, has low noise and is fast to evaluate.
* Ashikhmin-Shirley is now available in the Glossy BSDF.

5 files changed, 27 insertions, 7 deletions

diff --git a/source/blender/nodes/NOD_static_types.h b/source/blender/nodes/NOD_static_types.h
index 08dffd0ac92..1efdd7adb6b 100644
--- a/source/blender/nodes/NOD_static_types.h
+++ b/source/blender/nodes/NOD_static_types.h
@@ -77,11 +77,11 @@ DefNode( ShaderNode,     SH_NODE_ATTRIBUTE,          def_sh_attribute,       "AT
 DefNode( ShaderNode,     SH_NODE_AMBIENT_OCCLUSION,  0,                      "AMBIENT_OCCLUSION",  AmbientOcclusion, "Ambient Occlusion", ""       )
 DefNode( ShaderNode,     SH_NODE_BACKGROUND,         0,                      "BACKGROUND",         Background,       "Background",        ""       )
 DefNode( ShaderNode,     SH_NODE_HOLDOUT,            0,                      "HOLDOUT",            Holdout,          "Holdout",           ""       )
-DefNode( ShaderNode,     SH_NODE_BSDF_ANISOTROPIC,   def_anisotropic,        "BSDF_ANISOTROPIC",   BsdfAnisotropic,  "Anisotropic BSDF",  ""       )
+DefNode( ShaderNode,     SH_NODE_BSDF_ANISOTROPIC,   def_glossy,             "BSDF_ANISOTROPIC",   BsdfAnisotropic,  "Anisotropic BSDF",  ""       )
 DefNode( ShaderNode,     SH_NODE_BSDF_DIFFUSE,       0,                      "BSDF_DIFFUSE",       BsdfDiffuse,      "Diffuse BSDF",      ""       )
 DefNode( ShaderNode,     SH_NODE_BSDF_GLOSSY,        def_glossy,             "BSDF_GLOSSY",        BsdfGlossy,       "Glossy BSDF",       ""       )
-DefNode( ShaderNode,     SH_NODE_BSDF_GLASS,         def_glossy,             "BSDF_GLASS",         BsdfGlass,        "Glass BSDF",        ""       )
-DefNode( ShaderNode,     SH_NODE_BSDF_REFRACTION,    def_glossy,             "BSDF_REFRACTION",    BsdfRefraction,   "Refraction BSDF",   ""       )
+DefNode( ShaderNode,     SH_NODE_BSDF_GLASS,         def_glass,              "BSDF_GLASS",         BsdfGlass,        "Glass BSDF",        ""       )
+DefNode( ShaderNode,     SH_NODE_BSDF_REFRACTION,    def_glass,              "BSDF_REFRACTION",    BsdfRefraction,   "Refraction BSDF",   ""       )
 DefNode( ShaderNode,     SH_NODE_BSDF_TRANSLUCENT,   0,                      "BSDF_TRANSLUCENT",   BsdfTranslucent,  "Translucent BSDF",  ""       )
 DefNode( ShaderNode,     SH_NODE_BSDF_TRANSPARENT,   0,                      "BSDF_TRANSPARENT",   BsdfTransparent,  "Transparent BSDF",  ""       )
 DefNode( ShaderNode,     SH_NODE_BSDF_VELVET,        0,                      "BSDF_VELVET",        BsdfVelvet,       "Velvet BSDF",       ""       )
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_anisotropic.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_anisotropic.c
index dd14006cd8a..b9c94fc3aee 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_anisotropic.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_anisotropic.c
@@ -44,6 +44,11 @@ static bNodeSocketTemplate sh_node_bsdf_anisotropic_out[] = {
 	{	-1, 0, ""	}
 };
 
+static void node_shader_init_anisotropic(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_GLOSSY_GGX;
+}
+
 static int node_shader_gpu_bsdf_anisotropic(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
 {
 	if (!in[3].link)
@@ -61,7 +66,7 @@ void register_node_type_sh_bsdf_anisotropic(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_bsdf_anisotropic_in, sh_node_bsdf_anisotropic_out);
 	node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
-	node_type_init(&ntype, NULL);
+	node_type_init(&ntype, node_shader_init_anisotropic);
 	node_type_storage(&ntype, "", NULL, NULL);
 	node_type_gpu(&ntype, node_shader_gpu_bsdf_anisotropic);
 
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
index a59cbd6f46e..55dafaeca35 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_glass.c
@@ -42,6 +42,11 @@ static bNodeSocketTemplate sh_node_bsdf_glass_out[] = {
 	{	-1, 0, ""	}
 };
 
+static void node_shader_init_glass(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_GLOSSY_BECKMANN;
+}
+
 static int node_shader_gpu_bsdf_glass(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
 {
 	if (!in[3].link)
@@ -59,7 +64,7 @@ void register_node_type_sh_bsdf_glass(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_bsdf_glass_in, sh_node_bsdf_glass_out);
 	node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
-	node_type_init(&ntype, NULL);
+	node_type_init(&ntype, node_shader_init_glass);
 	node_type_storage(&ntype, "", NULL, NULL);
 	node_type_gpu(&ntype, node_shader_gpu_bsdf_glass);
 
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_glossy.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_glossy.c
index b8ad5e4fbed..9518784eebe 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_glossy.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_glossy.c
@@ -41,6 +41,11 @@ static bNodeSocketTemplate sh_node_bsdf_glossy_out[] = {
 	{	-1, 0, ""	}
 };
 
+static void node_shader_init_glossy(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_GLOSSY_GGX;
+}
+
 static int node_shader_gpu_bsdf_glossy(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
 {
 	if (!in[2].link)
@@ -58,7 +63,7 @@ void register_node_type_sh_bsdf_glossy(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_bsdf_glossy_in, sh_node_bsdf_glossy_out);
 	node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
-	node_type_init(&ntype, NULL);
+	node_type_init(&ntype, node_shader_init_glossy);
 	node_type_storage(&ntype, "", NULL, NULL);
 	node_type_gpu(&ntype, node_shader_gpu_bsdf_glossy);
 
diff --git a/source/blender/nodes/shader/nodes/node_shader_bsdf_refraction.c b/source/blender/nodes/shader/nodes/node_shader_bsdf_refraction.c
index 5d1bcc81adb..90db7a5771d 100644
--- a/source/blender/nodes/shader/nodes/node_shader_bsdf_refraction.c
+++ b/source/blender/nodes/shader/nodes/node_shader_bsdf_refraction.c
@@ -42,6 +42,11 @@ static bNodeSocketTemplate sh_node_bsdf_refraction_out[] = {
 	{	-1, 0, ""	}
 };
 
+static void node_shader_init_refraction(bNodeTree *UNUSED(ntree), bNode *node)
+{
+	node->custom1 = SHD_GLOSSY_BECKMANN;
+}
+
 static int node_shader_gpu_bsdf_refraction(GPUMaterial *mat, bNode *UNUSED(node), bNodeExecData *UNUSED(execdata), GPUNodeStack *in, GPUNodeStack *out)
 {
 	if (!in[3].link)
@@ -59,7 +64,7 @@ void register_node_type_sh_bsdf_refraction(void)
 	node_type_compatibility(&ntype, NODE_NEW_SHADING);
 	node_type_socket_templates(&ntype, sh_node_bsdf_refraction_in, sh_node_bsdf_refraction_out);
 	node_type_size_preset(&ntype, NODE_SIZE_MIDDLE);
-	node_type_init(&ntype, NULL);
+	node_type_init(&ntype, node_shader_init_refraction);
 	node_type_storage(&ntype, "", NULL, NULL);
 	node_type_gpu(&ntype, node_shader_gpu_bsdf_refraction);