Commit: c4201e57f36e7a5bcb711bd1a92d5b334cd40dff
Author: Clément Foucault
Date: Fri Aug 11 01:25:40 2017 +0200
Branches: blender2.8
https://developer.blender.org/rBc4201e57f36e7a5bcb711bd1a92d5b334cd40dff
Eevee: Re: Fix NaN
This should be faster and apparently more stable.
===================================================================
M source/blender/draw/engines/eevee/shaders/bsdf_common_lib.glsl
===================================================================
diff --git a/source/blender/draw/engines/eevee/shaders/bsdf_common_lib.glsl
b/source/blender/draw/engines/eevee/shaders/bsdf_common_lib.glsl
index 520318d3134..4d2f92c6955 100644
--- a/source/blender/draw/engines/eevee/shaders/bsdf_common_lib.glsl
+++ b/source/blender/draw/engines/eevee/shaders/bsdf_common_lib.glsl
@@ -415,7 +415,9 @@ float F_eta(float eta, float cos_theta)
/* Fresnel */
vec3 F_schlick(vec3 f0, float cos_theta)
{
- float fac = pow(1.0 - cos_theta, 5);
+ float fac = 1.0 - cos_theta;
+ float fac2 = fac * fac;
+ fac = fac2 * fac2 * fac;
/* Unreal specular matching : if specular color is below 2% intensity,
* (using green channel for intensity) treat as shadowning */
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