Add static flag to limit fallback cubemap to metallic

1 files changed, 11 insertions, 2 deletions

diff --git a/yum_lighting.cginc b/yum_lighting.cginc
index 3af5654..b2a7952 100644
--- a/yum_lighting.cginc
+++ b/yum_lighting.cginc
@@ -124,8 +124,11 @@ float3 getIndirectSpecular(v2f i, YumPbr pbr, float3 view_dir, float diffuse_lum
   data.probePosition[1] = unity_SpecCube1_ProbePosition;

 #endif

 

+  const float3 env_refl = UnityGI_prefilteredRadiance(data, roughness, reflect_dir);

+

 #if defined(_FALLBACK_CUBEMAP)

   // Check if there's no valid scene cubemap

+  float3 canned_refl = env_refl;

   if (!SceneHasReflections() || _Fallback_Cubemap_Force) {

     // Set up data for fallback sampling similar to Unity's system

     half3 reflectVector = reflect(-view_dir, pbr.normal);

@@ -136,11 +139,17 @@ float3 getIndirectSpecular(v2f i, YumPbr pbr, float3 view_dir, float diffuse_lum
 

     half mip = roughness * UNITY_SPECCUBE_LOD_STEPS;

     float4 envSample = UNITY_SAMPLE_TEXCUBE_LOD(_Fallback_Cubemap, reflectVector, mip);

-    return DecodeHDR(envSample, _Fallback_Cubemap_HDR) * _Fallback_Cubemap_Brightness * diffuse_luminance;

+    canned_refl = DecodeHDR(envSample, _Fallback_Cubemap_HDR) * _Fallback_Cubemap_Brightness * diffuse_luminance;

   }

 #endif

 

-  return UnityGI_prefilteredRadiance(data, roughness, reflect_dir);

+#if defined(_FALLBACK_CUBEMAP_LIMIT_METALLIC)

+  return lerp(env_refl, canned_refl, pbr.metallic);

+#elif defined(_FALLBACK_CUBEMAP)

+  return canned_refl;

+#else

+  return env_refl;

+#endif

 }

 

 float3 yumSH9(float4 n) {