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| author | clayjohn <claynjohn@gmail.com> | 2022-12-12 13:25:40 -0800 |
|---|---|---|
| committer | clayjohn <claynjohn@gmail.com> | 2022-12-12 13:41:28 -0800 |
| commit | a062798b76ae5134cd2c7e10b8c2632d335ea299 (patch) | |
| tree | 5f582201bda6c14454f0e1f8a1f5a4b53eb58c99 | |
| parent | ae86d907e75c3de9b039e7cc77e521bc9739e6dc (diff) | |
Ensure that rim lighting uses a exponent base greater than zero
This avoids the undefined behavior that happens if the base is zero and the exponent is zero
| -rw-r--r-- | servers/rendering/renderer_rd/shaders/scene_forward_lights_inc.glsl | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/servers/rendering/renderer_rd/shaders/scene_forward_lights_inc.glsl b/servers/rendering/renderer_rd/shaders/scene_forward_lights_inc.glsl index ba31b9c6dd..b30b0c8169 100644 --- a/servers/rendering/renderer_rd/shaders/scene_forward_lights_inc.glsl +++ b/servers/rendering/renderer_rd/shaders/scene_forward_lights_inc.glsl @@ -134,7 +134,8 @@ 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 |