Commit: 65a3195781cbcca859b1f466f5395b226add4cb6
Author: Clément Foucault
Date: Tue Oct 20 21:59:04 2020 +0200
Branches: master
https://developer.blender.org/rB65a3195781cbcca859b1f466f5395b226add4cb6
EEVEE: Screen Space Reflection: Fix undefined behavior with invalid LOD
Some issues happened because the lod can become negative in some cases.
Also avoid sampling LOD with interpolation (floor).
===================================================================
M source/blender/draw/engines/eevee/shaders/raytrace_lib.glsl
===================================================================
diff --git a/source/blender/draw/engines/eevee/shaders/raytrace_lib.glsl
b/source/blender/draw/engines/eevee/shaders/raytrace_lib.glsl
index 22c306bb0fd..cad1346609a 100644
--- a/source/blender/draw/engines/eevee/shaders/raytrace_lib.glsl
+++ b/source/blender/draw/engines/eevee/shaders/raytrace_lib.glsl
@@ -16,6 +16,7 @@ float sample_depth(vec2 uv, int index, float lod)
}
else {
#endif
+ lod = clamp(floor(lod), 0.0, 8.0);
/* Correct UVs for mipmaping mis-alignment */
uv *= mipRatio[int(lod) + hizMipOffset];
return textureLod(maxzBuffer, uv, lod).r;
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