Added new fabirc pbr mode;

Added new stocking surface feature;

Fixed the issue that diffuse bsdf is not energy conserving.
Fixed the bug that shader can not render alpha clip properly;

Runtime/Shaders/Includes/Common/UtsCommon.hlsl

@@ -50,6 +50,57 @@ float3 UtsComputeDiffuseColor(float3 baseColor, float metallic)
     return UtsComputeDiffuseColor(baseColor, metallic, 0.0);
 }
 
+float Random(float2 uv)
+{
+    return frac(sin(dot(uv, float2(12.9898, 78.233))) * 43758.5453);
+}
+
+float unity_noise_interpolate (float a, float b, float t)
+{
+    return (1.0-t)*a + (t*b);
+}
+
+float ValueNoise (float2 uv)
+{
+    float2 i = floor(uv);
+    float2 f = frac(uv);
+    f = f * f * (3.0 - 2.0 * f);
+
+    uv = abs(frac(uv) - 0.5);
+    float2 c0 = i + float2(0.0, 0.0);
+    float2 c1 = i + float2(1.0, 0.0);
+    float2 c2 = i + float2(0.0, 1.0);
+    float2 c3 = i + float2(1.0, 1.0);
+    float r0 = Random(c0);
+    float r1 = Random(c1);
+    float r2 = Random(c2);
+    float r3 = Random(c3);
+
+    float bottomOfGrid = unity_noise_interpolate(r0, r1, f.x);
+    float topOfGrid = unity_noise_interpolate(r2, r3, f.x);
+    float t = unity_noise_interpolate(bottomOfGrid, topOfGrid, f.y);
+    return t;
+}
+
+float SimpleNoise(float2 UV, float Scale)
+{
+    float t = 0.0;
+
+    float freq = pow(2.0, float(0));
+    float amp = pow(0.5, float(3-0));
+    t += ValueNoise(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
+
+    freq = pow(2.0, float(1));
+    amp = pow(0.5, float(3-1));
+    t += ValueNoise(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
+
+    freq = pow(2.0, float(2));
+    amp = pow(0.5, float(3-2));
+    t += ValueNoise(float2(UV.x*Scale/freq, UV.y*Scale/freq))*amp;
+
+    return t;
+}
+
 #define SampleRampSignalLine(texture, u) (SAMPLE_TEXTURE2D_LOD(texture, s_linear_clamp_sampler, float2(u, 0.5), 0))
 
 // Exposure
@@ -243,4 +294,4 @@ float3 GetWorldPosFromDepthBuffer(float2 clipPos01, float cameraDepth)
 	
 	return mul(unity_CameraToWorld, float4(localInvertDepthDirHD, 1.0)).xyz;
 }
-#endif
+#endif

Runtime/Shaders/Includes/Common/UtsLitData.hlsl

@@ -295,7 +295,7 @@ void UtsGetSurfaceAndBuiltinData(FragInputs input, float3 V, inout PositionInput
 #else
     float alphaCutoff = _AlphaCutoff;
 #endif
-
+    // clip(-0.1);
     GENERIC_ALPHA_TEST(alphaValue, alphaCutoff);
 #endif
 

Runtime/Shaders/Includes/Common/UtsSurfaceFeatureEvaluation.hlsl

@@ -1,6 +1,22 @@
 #ifndef UTS_SURFACE_FEATURE_EVALUATION
 #define UTS_SURFACE_FEATURE_EVALUATION
 
+void UtsEvaluateLighting_Stocking(FragInputs input, PositionInputs posInput, float3 normalWS, float3 V, inout AggregateLighting aggregateLighting)
+{
+    float NdotV = saturate(dot(normalize(V), normalWS));
+
+    NdotV = pow(NdotV, 2.0);
+
+    // TODO: Move sparkle to bsdf evaluation?
+    // float sparkle = Random(posInput.positionNDC.xy);
+    // sparkle = step(0.995, sparkle);
+    // float noise = SimpleNoise(posInput.positionNDC.xy, 500.0);
+    // sparkle = noise < sparkle ? 1.0 : 0.0;
+
+    aggregateLighting.direct.diffuse *= NdotV;
+    // aggregateLighting.direct.specular = saturate(aggregateLighting.direct.specular + sparkle * (1.0 - NdotV) * 0.5);
+}
+
 DirectLighting UtsEvaluateLighting_RimLight(PositionInputs posInput, UtsBSDFData bsdfData, PreLightData preLightData
 #if _LIGHT_BASE_RIM_LIGHT_ON
     , float3 L, float3 lightColor
@@ -9,9 +25,10 @@ DirectLighting UtsEvaluateLighting_RimLight(PositionInputs posInput, UtsBSDFData
 {
     DirectLighting lighting;
     ZERO_INITIALIZE(DirectLighting, lighting);
-    
+
     float3 rimLightColor = _RimLightColor.rgb * _RimLightIntensity;
-    
+    rimLightColor = lerp(rimLightColor, rimLightColor * bsdfData.diffuseColor.rgb, _AlbedoAffectRimLight * _RimLightColor.a);
+
 #if _SCREEN_SPACE_RIM_LIGHT_ON
     float3 normalVS = normalize(mul((float3x3)UNITY_MATRIX_V, bsdfData.geomNormalWS));
     float2 depthUV = posInput.positionNDC.xy + normalVS.xy * (_RimLightLevel * 0.05 / posInput.linearDepth);
@@ -24,17 +41,17 @@ DirectLighting UtsEvaluateLighting_RimLight(PositionInputs posInput, UtsBSDFData
     float rimLightMask = pow(1.0 - clampNdotV, exp2(lerp(3.0, 0.0, _RimLightLevel)));
     rimLightMask = lerp(rimLightMask, step(_RimLightClippingLevel, rimLightMask), _RimLightClipping);
 #endif
-    
+
 #if _LIGHT_BASE_RIM_LIGHT_ON
     float halfLambert = 0.5 * dot(bsdfData.normalWS, L) + 0.5;
     float lightBaseMask = saturate(smoothstep(_LightDirectionRimLightLevel, 1.0, halfLambert));
-    
+
     rimLightMask *= lightBaseMask;
     rimLightColor *= lightColor;
 #endif
-    
+
     lighting.diffuse = rimLightMask * rimLightColor;
-    
+
     return lighting;
 }
 
@@ -42,7 +59,7 @@ DirectLighting UtsEvaluateLighting_AngelRing(FragInputs input, float3 normalWS,
 {
     DirectLighting lighting;
     ZERO_INITIALIZE(DirectLighting, lighting);
-    
+
     // Should we scroll the angel ring texture on x?
     float3 cameraRight = UNITY_MATRIX_V[0].xyz;
     float3 cameraFront = UNITY_MATRIX_V[2].xyz;
@@ -53,18 +70,18 @@ DirectLighting UtsEvaluateLighting_AngelRing(FragInputs input, float3 normalWS,
     float cameraRollCos = dot(rightAxis, cameraRight) / (rightAxisMagnitude * cameraRightMagnitude);
     float3 cameraRoll = acos(clamp(cameraRollCos, -1.0, 1.0));
     float cameraDir = cameraRight.y < 0 ? -1.0 : 1.0;
-    
+
     float2 arOffsetU = lerp(mul(UNITY_MATRIX_V, float4(normalWS, 0)).xyz, float3(0, 0, 1), _AngelRingOffsetU).xy;
     arOffsetU = arOffsetU * 0.5 + 0.5;
     float2 arvnRotate = RotateUV(arOffsetU, -(cameraDir * cameraRoll).x, 0.5, 1.0);
     float2 arOffsetUV = float2(arvnRotate.x, lerp(input.texCoord0.y, arvnRotate.y, _AngelRingOffsetV));
     float4 angelRingColor = SAMPLE_TEXTURE2D(_AngelRingColorMap, sampler_AngelRingColorMap, TRANSFORM_TEX(arOffsetUV, _AngelRingColorMap)) * _AngelRingColor * _AngelRingIntensity;
-    
+
     float weight = saturate(dot(normalize(V), normalWS));
-    
+
     lighting.specular = angelRingColor.r * angelRingColor.a * weight;
-    
+
     return lighting;
 }
 
-#endif
+#endif