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/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