Cycles: support for custom shader AOVs

Custom render passes are added in the Shader AOVs panel in the view layer
settings, with a name and data type. In shader nodes, an AOV Output node
is then used to output either a value or color to the pass.

Arbitrary names can be used for these passes, as long as they don't conflict
with built-in passes that are enabled. The AOV Output node can be used in both
material and world shader nodes.

Implemented by Lukas, with tweaks by Brecht.

Differential Revision: https://developer.blender.org/D4837

1 files changed, 6 insertions, 0 deletions

diff --git a/intern/cycles/blender/blender_shader.cpp b/intern/cycles/blender/blender_shader.cpp
index 412e54ea29d..c3564eac940 100644
--- a/intern/cycles/blender/blender_shader.cpp
+++ b/intern/cycles/blender/blender_shader.cpp
@@ -921,6 +921,12 @@ static ShaderNode *add_node(Scene *scene,
     disp->attribute = "";
     node = disp;
   }
+  else if (b_node.is_a(&RNA_ShaderNodeOutputAOV)) {
+    BL::ShaderNodeOutputAOV b_aov_node(b_node);
+    OutputAOVNode *aov = new OutputAOVNode();
+    aov->name = b_aov_node.name();
+    node = aov;
+  }
 
   if (node) {
     node->name = b_node.name();