Add directionality and quantization to rim lighting

1 files changed, 6 insertions, 0 deletions

diff --git a/math.cginc b/math.cginc
index 414f618..8edbc88 100644
--- a/math.cginc
+++ b/math.cginc
@@ -17,6 +17,12 @@ float wrapNoL(float NoL, float factor) {
     return pow(max(1E-4, (NoL + factor) / (1 + factor)), 1 + factor);

 }

 

+float halfLambertianNoL(float NoL) {

+		// https://www.iro.umontreal.ca/~derek/files/jgt_wrap_final.pdf

+    float tmp = (NoL + 1)  * 0.5;

+    return tmp * tmp;

+}

+

 float rand1(float p)

 {

   return frac(sin(p) * 43758.5453123);