--- a/shaders/scanlines-basic.frag	Tue Dec 26 15:41:07 2023 +0100
+++ b/shaders/scanlines-basic.frag	Tue Dec 26 23:46:45 2023 +0100
@@ -1,12 +1,13 @@
 #version 330 core
 
 uniform  sampler2D  uTexture;
+uniform  float      uTextureScale;
 in       vec2       vTextureXY;
 out      vec4       fColor;
 
 void main() {
 	fColor = texture(uTexture, vTextureXY).rgba;
 
-	float lineCount = textureSize(uTexture, 0).y;
+	float lineCount = textureSize(uTexture, 0).y / uTextureScale;
 	fColor.xyz *= abs(sin(radians(vTextureXY.y * 180. * lineCount)));
 }