Fix tessellation shadows, and potential lighting NaNs

1 files changed, 15 insertions, 15 deletions

diff --git a/lighting.cginc b/lighting.cginc
index cde444a..c8c3f64 100755
--- a/lighting.cginc
+++ b/lighting.cginc
@@ -205,28 +205,28 @@ void GetLighting(v2f i, Pbr pbr, out LightData data) {
 
 	data.common.V = -view_dir;
 	data.common.N = pbr.normal;
-  data.common.NoV = saturate(dot(pbr.normal, data.common.V));
+  data.common.NoV = max(1e-4, dot(pbr.normal, data.common.V));
 #if defined(_CLEARCOAT)
-  data.common.NoV_cc = saturate(dot(pbr.cc_normal, data.common.V));
+  data.common.NoV_cc = max(1e-4, dot(pbr.cc_normal, data.common.V));
 #endif
 
 	// Direct lighting
 	data.direct.dir = getDirectLightDirection(i);
 	data.direct.H = normalize(data.common.V + data.direct.dir);
 #if defined(_WRAPPED_LIGHTING)
-  data.direct.NoL = wrapNoL(saturate(dot(pbr.normal, data.direct.dir)), _Wrapped_Lighting_Amount);
+  data.direct.NoL = max(1e-4, wrapNoL(saturate(dot(pbr.normal, data.direct.dir)), _Wrapped_Lighting_Amount));
 #else
-	data.direct.NoL = saturate(dot(pbr.normal, data.direct.dir));
+	data.direct.NoL = max(1e-4, dot(pbr.normal, data.direct.dir));
 #endif
-	data.direct.NoH = saturate(dot(pbr.normal, data.direct.H));
-  data.direct.LoH = saturate(dot(data.direct.dir, data.direct.H));
+	data.direct.NoH = max(1e-4, dot(pbr.normal, data.direct.H));
+  data.direct.LoH = max(1e-4, dot(data.direct.dir, data.direct.H));
 #if defined(_CLEARCOAT)
-  data.direct.NoH_cc = saturate(dot(pbr.cc_normal, data.direct.H));
-  data.direct.NoL_cc = saturate(dot(pbr.cc_normal, data.direct.dir));
+  data.direct.NoH_cc = max(1e-4, dot(pbr.cc_normal, data.direct.H));
+  data.direct.NoL_cc = max(1e-4, dot(pbr.cc_normal, data.direct.dir));
 #endif
   float direct_LoV = dot(data.direct.dir, data.common.V);
-  data.direct.LoV = saturate(direct_LoV);
-  data.direct.double_LoV = saturate(2.0f * direct_LoV * direct_LoV - 1.0f);
+  data.direct.LoV = max(1e-4, direct_LoV);
+  data.direct.double_LoV = max(1e-4, 2.0f * direct_LoV * direct_LoV - 1.0f);
 
 	float4 lightColorIntensity = getDirectLightColorIntensity();
 	data.direct.color = lightColorIntensity.rgb * getShadowAttenuation(i);
@@ -237,18 +237,18 @@ void GetLighting(v2f i, Pbr pbr, out LightData data) {
 
   data.indirect.dir = normalize(dominant_dir);
 	data.indirect.H = normalize(data.common.V + data.indirect.dir);
-	data.indirect.NoL = saturate(dot(pbr.normal, data.indirect.dir));
-	data.indirect.NoH = saturate(dot(pbr.normal, data.indirect.H));
+	data.indirect.NoL = max(1e-4, dot(pbr.normal, data.indirect.dir));
+	data.indirect.NoH = max(1e-4, dot(pbr.normal, data.indirect.H));
 #if defined(_CLEARCOAT)
   float3 cc_reflect_dir = reflect(-data.common.V, pbr.cc_normal);
   float3 cc_dominant_dir = getSpecularDominantDirection(pbr.cc_normal, cc_reflect_dir, pbr.cc_roughness);
   float3 dir_cc = normalize(cc_dominant_dir);
   float3 H_cc = normalize(data.common.V + dir_cc);
 #endif
-  data.indirect.LoH = saturate(dot(data.indirect.dir, data.indirect.H));
+  data.indirect.LoH = max(1e-4, dot(data.indirect.dir, data.indirect.H));
   float indirect_LoV = dot(data.indirect.dir, data.common.V);
-  data.indirect.LoV = saturate(indirect_LoV);
-  data.indirect.double_LoV = saturate(2.0f * indirect_LoV * indirect_LoV - 1.0f);
+  data.indirect.LoV = max(1e-4, indirect_LoV);
+  data.indirect.double_LoV = max(1e-4, 2.0f * indirect_LoV * indirect_LoV - 1.0f);
 
 	data.indirect.diffuse = getIndirectDiffuse(i, pbr, data);
 	data.indirect.specular = getIndirectSpecular(i, pbr.roughness_perceptual, view_dir, data.indirect.dir, data.indirect.diffuse);