Fix yellowish artifacts due to quantization error in TAA and composite image output

#3318 #3254

Source/Shaders/PostProcessing.shader

@@ -22,6 +22,7 @@
 
 #include "./Flax/Common.hlsl"
 #include "./Flax/Random.hlsl"
+#include "./Flax/Noise.hlsl"
 #include "./Flax/GammaCorrectionCommon.hlsl"
 
 #define GB_RADIUS 6
@@ -80,6 +81,9 @@ float LensDirtIntensity;
 
 float4 ScreenFadeColor;
 
+float3 QuantizationError;
+float Dummy2;
+
 float4x4 LensFlareStarMat;
 
 META_CB_END
@@ -738,6 +742,10 @@ float4 PS_Composite(Quad_VS2PS input) : SV_Target
 	// Saturate color since it will be rendered to the screen
 	color.rgb = saturate(color.rgb);
 
+    // Apply quantization error to reduce yellowish artifacts due to R11G11B10 format
+    float noise = rand2dTo1d(input.TexCoord);
+    color.rgb = QuantizeColor(color.rgb, noise, QuantizationError);
+
 	// Return final pixel color (preserve input alpha)
 	return color;
 }

Source/Shaders/TAA.shader

@@ -5,6 +5,7 @@
 
 #include "./Flax/Common.hlsl"
 #include "./Flax/GBuffer.hlsl"
+#include "./Flax/Noise.hlsl"
 
 META_CB_BEGIN(0, Data)
 float2 ScreenSizeInv;
@@ -13,6 +14,8 @@ float Sharpness;
 float StationaryBlending;
 float MotionBlending;
 float Dummy0;
+float3 QuantizationError;
+float Dummy1;
 GBufferData GBuffer;
 META_CB_END
 
@@ -104,5 +107,10 @@ float4 PS(Quad_VS2PS input) : SV_Target0
 	color = lerp(color, neighborhoodSharp, saturate(miss));
 
 	color = clamp(color, 0, HDR_CLAMP_MAX);
+
+    // Apply quantization error to reduce yellowish artifacts due to R11G11B10 format
+    float noise = rand2dTo1d(input.TexCoord);
+    color.rgb = QuantizeColor(color.rgb, noise, QuantizationError);
+
 	return color;
 }