Fix Schlick Fresnel when f90 < 1

2018-09-14 09:44:34 -07:00
parent 41d70cb30a
commit 96d3846571
1 changed files with 1 additions and 2 deletions
--- a/shaders/src/brdf.fs
+++ b/shaders/src/brdf.fs
@@ -151,8 +151,7 @@ float V_Neubelt(float NoV, float NoL) {

 vec3 F_Schlick(const vec3 f0, float f90, float VoH) {
    // Schlick 1994, "An Inexpensive BRDF Model for Physically-Based Rendering"
-    float f = pow5(1.0 - VoH);
-    return f + f0 * (f90 - f);
+    return f0 + (f90 - f0) * pow5(1.0 - VoH);
 }

 float F_Schlick(float f0, float f90, float VoH) {