filters/color-grading: Fix incorrect Lift logic (#515)

Fixes #515
Xaymar · Apr 14, 2021 · 0903d3e · 0903d3e
1 parent df7d916
commit 0903d3e
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/data/effects/color-grade.effect b/data/effects/color-grade.effect
@@ -50,8 +50,9 @@ uniform float4 pCorrection;
 // Functionality
 //------------------------------------------------------------------------------
 
-float3 grade_lift(float3 v) { // same as grade_offset?
-	return (v.rgb + pLift.rgb) + pLift.a;
+float3 grade_lift(float3 v) {
+	float3 multiplier = float3(1., 1., 1.) - (pLift.rgb * pLift.a);
+	return float3(1., 1., 1.) - ((float3(1., 1., 1.) - v) * multiplier);
 };
 
 float3 grade_gamma(float3 v) {