From 92c6798e701299154f382aeb2262e81928a2fb13 Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Tue, 11 Nov 2025 21:30:08 -0800
Subject: brdf simplifications

---
 brdf.cginc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/brdf.cginc b/brdf.cginc
index 8714181..682f6a0 100644
--- a/brdf.cginc
+++ b/brdf.cginc
@@ -53,7 +53,7 @@ float D_GGX(float roughness, float NoH) {
   float r2_plus_k = r2 + k;
   float denom = NoH4 * r2_plus_k * r2_plus_k;
 
-  return r2 / (denom * PI);
+  return r2 / denom;
 }
 
 // Hammon "PBR Diffuse Lighting for GGX+Smith Microsurfaces"
@@ -185,6 +185,7 @@ float4 brdf(Pbr pbr, LightData data) {
     float DFGcc = Fcc * Dcc * Gcc;
     float3 direct_specular_cc = DFGcc * data.direct.color * data.direct.NoL_cc * pbr.cc_strength;
     direct_specular_cc *= cc_energy_comp;
+    direct_specular_cc *= layer_attenuation;
     direct_specular_cc = max(0, direct_specular_cc);
     specular += direct_specular_cc;
     layer_attenuation *= saturate(1.0f - Fcc * pbr.cc_strength);
@@ -209,7 +210,6 @@ float4 brdf(Pbr pbr, LightData data) {
     direct_specular *= data.direct.color * data.direct.NoL;
     direct_specular *= energy_comp;
     direct_specular *= layer_attenuation;
-    direct_specular *= PI;
     direct_specular = max(0, direct_specular);
     specular += direct_specular;
 
-- 
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