[Bf-blender-cvs] [faca2c614b6] blender-v3.3-release: Fix T103507: Distant lights partially contribute to wrong lightgroup

[Lukas Stockner]

Commit: faca2c614b67a1b66e55ad20df5eb30cb009a757
Author: Lukas Stockner
Date:   Fri Jan 6 01:08:17 2023 +0100
Branches: blender-v3.3-release
https://developer.blender.org/rBfaca2c614b67a1b66e55ad20df5eb30cb009a757

Fix T103507: Distant lights partially contribute to wrong lightgroup

The the BSDF-sampling half of MIS next-event estimation for distant lights was
using the background lightgroup instead of the lamp's lightgroup.

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

M	intern/cycles/kernel/integrator/shade_background.h

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

diff --git a/intern/cycles/kernel/integrator/shade_background.h b/intern/cycles/kernel/integrator/shade_background.h
index a7edfffd175..cfae6805f17 100644
--- a/intern/cycles/kernel/integrator/shade_background.h
+++ b/intern/cycles/kernel/integrator/shade_background.h
@@ -185,8 +185,7 @@ ccl_device_inline void integrate_distant_lights(KernelGlobals kg,
 
       /* Write to render buffer. */
       const float3 throughput = INTEGRATOR_STATE(state, path, throughput);
-      kernel_accum_emission(
-          kg, state, throughput * light_eval, render_buffer, kernel_data.background.lightgroup);
+      kernel_accum_emission(kg, state, throughput * light_eval, render_buffer, ls.group);
     }
   }
 }