From 264669fc0379296ebb31632d879aaa71e1b59c02 Mon Sep 17 00:00:00 2001
From: Brecht Van Lommel <brecht@blender.org>
Date: Thu, 24 Jul 2025 15:24:03 +0200
Subject: [PATCH] Fix #142953: Cycles renders world lightgroup wrong

Pull Request: https://projects.blender.org/blender/blender/pulls/143003
---
 intern/cycles/blender/light.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/intern/cycles/blender/light.cpp b/intern/cycles/blender/light.cpp
index 746e215b1d1..2a552ff1c93 100644
--- a/intern/cycles/blender/light.cpp
+++ b/intern/cycles/blender/light.cpp
@@ -136,6 +136,7 @@ void BlenderSync::sync_background_light(BL::SpaceView3D &b_v3d)
       if (update) {
         /* Lights should be shadow catchers by default. */
         object->set_is_shadow_catcher(true);
+        object->set_lightgroup(ustring(b_world ? b_world.lightgroup() : ""));
       }
 
       /* Create geometry. */