Merge pull request #71832 from Geometror/fix-spotlight-artifacts

Fix some `SpotLight3D` issues (clustering artifacts, leaking light, AABB)

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gles3/shaders/scene.glsl b/drivers/gles3/shaders/scene.glsl
index 951155e287..52ff70f746 100644
--- a/drivers/gles3/shaders/scene.glsl
+++ b/drivers/gles3/shaders/scene.glsl
@@ -690,7 +690,8 @@ void light_compute(vec3 N, vec3 L, vec3 V, float A, vec3 light_color, float atte
 #endif
 
 #if defined(LIGHT_RIM_USED)
-		float rim_light = pow(max(0.0, 1.0 - cNdotV), max(0.0, (1.0 - roughness) * 16.0));
+		// Epsilon min to prevent pow(0, 0) singularity which results in undefined behavior.
+		float rim_light = pow(max(1e-4, 1.0 - cNdotV), max(0.0, (1.0 - roughness) * 16.0));
 		diffuse_light += rim_light * rim * mix(vec3(1.0), albedo, rim_tint) * light_color;
 #endif
 	}