[Bf-blender-cvs] [206b098fab5] soc-2022-many-lights-sampling: Fix improper variable setting in PDF function while splitting

[Brecht Van Lommel]

Commit: 206b098fab5e9fedd44aa8f1c493c7dd9b87369b
Author: Brecht Van Lommel
Date:   Tue Sep 13 17:47:36 2022 +0200
Branches: soc-2022-many-lights-sampling
https://developer.blender.org/rB206b098fab5e9fedd44aa8f1c493c7dd9b87369b

Fix improper variable setting in PDF function while splitting

This fixes an issue where a variable in the light_tree_pdf function
(selected_light) would not be set properly.

This fixes some issues that can be observed when splitting is in use.

Contributed by Alaska.

Differential Revision: https://developer.blender.org/D15955

===================================================================

M	intern/cycles/kernel/light/light_tree.h

===================================================================

diff --git a/intern/cycles/kernel/light/light_tree.h b/intern/cycles/kernel/light/light_tree.h
index 54a4c88ea25..32da3f5bf29 100644
--- a/intern/cycles/kernel/light/light_tree.h
+++ b/intern/cycles/kernel/light/light_tree.h
@@ -572,7 +572,7 @@ ccl_device float light_tree_pdf(
       }
       else {
         float light_probability = 1.0f;
-        const int selected_light = light_tree_cluster_select_emitter(
+        selected_light = light_tree_cluster_select_emitter(
             kg, &randu, P, N, knode, &light_probability);
         light_weight = light_tree_emitter_reservoir_weight(kg, P, N, selected_light);
       }