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-rw-r--r--hlsl/post.fx2
1 files changed, 1 insertions, 1 deletions
diff --git a/hlsl/post.fx b/hlsl/post.fx
index 4186e040e47..9a22a7cdc9c 100644
--- a/hlsl/post.fx
+++ b/hlsl/post.fx
@@ -155,7 +155,7 @@ float4 ps_main(PS_INPUT Input) : COLOR
// -- Scanline Simulation --
float InnerSine = BaseCoord.y * RawHeight * ScanlineScale + 0.5f;
- float3 ScanBrightness = lerp(1.0f, sin(InnerSine * PI * 2.0f + ScanlineOffset * RawHeight) * ScanlineBrightScale + 1.0f, ScanlineAmount);
+ float3 ScanBrightness = lerp(1.0f, abs(sin(InnerSine * PI + ScanlineOffset * RawHeight)) * ScanlineBrightScale + 1.0f, ScanlineAmount);
float3 Scanned = BaseTexel.rgb * ScanBrightness;
float2 ShadowDims = float2(ShadowWidth, ShadowHeight);