diff --git a/shaders/module/scanline.frag b/shaders/module/scanline.frag
index 042acba..a918364 100644
--- a/shaders/module/scanline.frag
+++ b/shaders/module/scanline.frag
@@ -3,15 +3,16 @@
 
 #define scanline 0 // [0 1 2]
 
-public void scanlines() {
+vec3 scanlines(vec3 color) {
 	#if		scanline == SCANLINE_SOFT
-		if(mod(int(gl_FragCoord.y) / (pixelSize * 2), 2) == 0)
+		if(mod(int(gl_FragCoord.y / pixelSize * 2), 2) == 0)
 			color.rgb *= 0.95;
 		else
 			color.rgb /= 0.95;
 	#elif	scanline == SCANLINE_HARD
-		if(mod(int(gl_FragCoord.y) / (pixelSize * 2), 2) == 0)
+		if(mod(int(gl_FragCoord.y / pixelSize), 2) == 0)
 			color.rgb *= 0.5;
 	#endif
+	return color;
 }