diff --git a/plugins/GSdx/res/convert.fx b/plugins/GSdx/res/convert.fx
index 478975dfd7..c482722391 100644
--- a/plugins/GSdx/res/convert.fx
+++ b/plugins/GSdx/res/convert.fx
@@ -214,7 +214,7 @@ PS_OUTPUT ps_main9(PS_INPUT input) // triangular
 	if (ddy(input.t.y) * texdim.y > 0.5) 
 		output.c = sample_c(input.t); 
 	else
-		output.c = (0.5 - 0.5 * cos(2 * PI * input.t.y * texdim.y)) * sample_c(float2(input.t.x, (floor(input.t.y * texdim.y) + 0.5) / texdim.y));
+		output.c = (0.9 - 0.4 * cos(2 * PI * input.t.y * texdim.y)) * sample_c(float2(input.t.x, (floor(input.t.y * texdim.y) + 0.5) / texdim.y));
 
 	return output;
 }