Fix T85144: Cycles crashes when editing render properties in viewport

rendering

Issue was caused by the sample pattern LUT always being freed and not
rebuilt when properties driving its dimensions were modified.

1 files changed, 4 insertions, 0 deletions

diff --git a/intern/cycles/render/light.cpp b/intern/cycles/render/light.cpp
index 6e9dea564c2..638ac376157 100644
--- a/intern/cycles/render/light.cpp
+++ b/intern/cycles/render/light.cpp
@@ -164,6 +164,10 @@ void Light::tag_update(Scene *scene)
 {
   if (is_modified()) {
     scene->light_manager->tag_update(scene, LightManager::LIGHT_MODIFIED);
+
+    if (samples_is_modified()) {
+      scene->integrator->tag_update(scene, Integrator::LIGHT_SAMPLES_MODIFIED);
+    }
   }
 }