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, 11 deletions

diff --git a/intern/cycles/blender/blender_session.cpp b/intern/cycles/blender/blender_session.cpp
index 1f0816a6edb..53f2fdb91b9 100644
--- a/intern/cycles/blender/blender_session.cpp
+++ b/intern/cycles/blender/blender_session.cpp
@@ -793,18 +793,13 @@ void BlenderSession::do_write_update_render_result(BL::RenderLayer &b_rlay,
 
     for (b_rlay.passes.begin(b_iter); b_iter != b_rlay.passes.end(); ++b_iter) {
       BL::RenderPass b_pass(*b_iter);
-
-      /* find matching pass type */
-      PassType pass_type = BlenderSync::get_pass_type(b_pass);
       int components = b_pass.channels();
 
-      bool read = false;
-      if (pass_type != PASS_NONE) {
-        /* copy pixels */
-        read = buffers->get_pass_rect(
-            pass_type, exposure, sample, components, &pixels[0], b_pass.name());
-      }
-      else {
+      /* Copy pixels from regular render passes. */
+      bool read = buffers->get_pass_rect(b_pass.name(), exposure, sample, components, &pixels[0]);
+
+      /* If denoising pass, */
+      if (!read) {
         int denoising_offset = BlenderSync::get_denoising_pass(b_pass);
         if (denoising_offset >= 0) {
           read = buffers->get_denoising_pass_rect(
@@ -822,7 +817,7 @@ void BlenderSession::do_write_update_render_result(BL::RenderLayer &b_rlay,
   else {
     /* copy combined pass */
     BL::RenderPass b_combined_pass(b_rlay.passes.find_by_name("Combined", b_rview_name.c_str()));
-    if (buffers->get_pass_rect(PASS_COMBINED, exposure, sample, 4, &pixels[0], "Combined"))
+    if (buffers->get_pass_rect("Combined", exposure, sample, 4, &pixels[0]))
       b_combined_pass.rect(&pixels[0]);
   }
 }