Fixed a sRGB issue with 2D user-luts

Author: Chman

PostProcessing/Shaders/Builtins/Uber.shader

@@ -215,7 +215,18 @@ Shader "Hidden/PostProcessing/Uber"
             #elif COLOR_GRADING_LDR_2D
             {
                 color = saturate(color);
-                color.rgb = ApplyLut2D(TEXTURE2D_PARAM(_Lut2D, sampler_Lut2D), color.rgb, _Lut2D_Params);
+
+                #if UNITY_COLORSPACE_GAMMA
+                {
+                    color.rgb = ApplyLut2D(TEXTURE2D_PARAM(_Lut2D, sampler_Lut2D), color.rgb, _Lut2D_Params);
+                }
+                #else
+                {
+                    color.rgb = LinearToSRGB(color.rgb);
+                    color.rgb = ApplyLut2D(TEXTURE2D_PARAM(_Lut2D, sampler_Lut2D), color.rgb, _Lut2D_Params);
+                    color.rgb = SRGBToLinear(color.rgb);
+                }
+                #endif
             }
             #endif
 

PostProcessing/Shaders/Colors.hlsl

@@ -468,7 +468,7 @@ half3 ApplyLut2D(TEXTURE2D_ARGS(tex, samplerTex), float3 uvw, float3 scaleOffset
 {
     // Strip format where `height = sqrt(width)`
     uvw.z *= scaleOffset.z;
-    half shift = floor(uvw.z);
+    float shift = floor(uvw.z);
     uvw.xy = uvw.xy * scaleOffset.z * scaleOffset.xy + scaleOffset.xy * 0.5;
     uvw.x += shift * scaleOffset.y;
     uvw.xyz = lerp(