diff options
Diffstat (limited to 'source/blender/gpu')
-rw-r--r-- | source/blender/gpu/shaders/gpu_shader_material.glsl | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/source/blender/gpu/shaders/gpu_shader_material.glsl b/source/blender/gpu/shaders/gpu_shader_material.glsl index afb5eca5263..44803f8f7ee 100644 --- a/source/blender/gpu/shaders/gpu_shader_material.glsl +++ b/source/blender/gpu/shaders/gpu_shader_material.glsl @@ -2578,7 +2578,11 @@ float schlick_fresnel(float u) float GTR1(float NdotH, float a) { - if (a >= 1.0) return M_1_PI; + if (a >= 1.0) { + return M_1_PI; + } + + a = max(a, 0.001); float a2 = a*a; float t = 1.0 + (a2 - 1.0) * NdotH*NdotH; return (a2 - 1.0) / (M_PI * log(a2) * t); |