diff --git a/crt/shaders/fake-crt-geom-potato.slang b/crt/shaders/fake-crt-geom-potato.slang
index bd2502b4..df06618c 100644
--- a/crt/shaders/fake-crt-geom-potato.slang
+++ b/crt/shaders/fake-crt-geom-potato.slang
@@ -64,11 +64,13 @@ vec2 corn = min(pos, 1.0-pos);    // This is used to mask the rounded
 
 float y = pos.y*SourceSize.y;
 vec2 dx = vec2(SourceSize.z*0.75,0.0);
+vec2 dy = vec2(0.0,SourceSize.w*0.5);
+
 // precalculated kaizer window filter
 vec3 res = vec3(0.0);
-res += texture(Source,pos -dx).rgb*-0.1082;
-res += texture(Source,pos ).rgb*0.5155;
-res /= 0.4073;
+res += texture(Source,pos -dx).rgb*-0.26565;
+res += texture(Source,pos -dy).rgb*-0.26565;
+res += texture(Source,pos ).rgb*1.5313;
 
 
 vec3 clean = res;