Add small scale for color grading LUT

Source/Shaders/ColorGrading.shader

@@ -281,8 +281,11 @@ float4 CombineLUTs(float2 uv, uint layerIndex)
 #endif
 
 	// Move from encoded LUT color space to linear color
-	//float3 linearColor = encodedColor.rgb; // Default
+#if COLOR_GRADING_LUT_LOG
 	float3 linearColor = LogToLinear(encodedColor.rgb) - LogToLinear(0); // Log
+#else
+	float3 linearColor = encodedColor.rgb; // Default
+#endif
 
 	// Apply white balance
 	linearColor = WhiteBalance(linearColor);
@@ -300,7 +303,7 @@ float4 CombineLUTs(float2 uv, uint layerIndex)
 		color = lerp(color, lutColor, LutWeight);
 	}
 
-	return float4(color, 1);
+	return float4(color / COLOR_GRADING_LUT_SCALE, 1);
 }
 
 // Vertex shader that writes to a range of slices of a volume texture

Source/Shaders/GammaCorrectionCommon.hlsl

@@ -5,6 +5,10 @@
 
 #include "./Flax/Math.hlsl"
 
+// Shared configs for Color Grading LUT
+#define COLOR_GRADING_LUT_LOG 1
+#define COLOR_GRADING_LUT_SCALE 1.04f
+
 // Fast reversible tonemapper
 // http://gpuopen.com/optimized-reversible-tonemapper-for-resolve/
 float3 FastTonemap(float3 c)

Source/Shaders/PostProcessing.shader

@@ -115,18 +115,20 @@ static const float LUTSize = 32;
 half3 ColorLookupTable(half3 linearColor)
 {
 	// Move from linear color to encoded LUT color space
-	//float3 encodedColor = linearColor; // Default
+#if COLOR_GRADING_LUT_LOG
 	float3 encodedColor = LinearToLog(linearColor + LogToLinear(0)); // Log
+#else
+	float3 encodedColor = linearColor; // Default
+#endif
 
 	float3 uvw = encodedColor * ((LUTSize - 1) / LUTSize) + (0.5f / LUTSize);
-
 #if USE_VOLUME_LUT
 	half3 color = ColorGradingLUT.Sample(SamplerLinearClamp, uvw).rgb;
 #else
 	half3 color = SampleUnwrappedTexture3D(ColorGradingLUT, SamplerLinearClamp, uvw, LUTSize).rgb;
 #endif
 
-	return color;
+	return color * COLOR_GRADING_LUT_SCALE;
 }
 
 // A random texture generator