fix energy conservation issues; notably smooth=0 metallic=1 matches filamented now

1 files changed, 4 insertions, 0 deletions

diff --git a/filamented.cginc b/filamented.cginc
index f6bd67a..62ec4c3 100644
--- a/filamented.cginc
+++ b/filamented.cginc
@@ -254,6 +254,10 @@ UnityGIInput InitialiseUnityGIInput(float3 worldPos, float3 view_dir)
     return d;
 }
 
+float3 getSpecularDominantDirection(const float3 n, const float3 r, float roughness) {
+  return lerp(r, n, roughness * roughness);
+}
+
 inline half3 UnityGI_prefilteredRadiance(const UnityGIInput data, const float perceptualRoughness, const float3 r)
 {
     half3 specular;