--- a/shaders/phosphor-basic.frag	Tue Dec 26 15:41:07 2023 +0100
+++ b/shaders/phosphor-basic.frag	Tue Dec 26 23:46:45 2023 +0100
@@ -1,6 +1,7 @@
 #version 330 core
 
 uniform  sampler2D  uTexture;
+uniform  float      uTextureScale;
 in       vec2       vTextureXY;
 out      vec4       fColor;
 
@@ -26,10 +27,10 @@
 	// fColor = invert(fColor);
 	fColor = (fColor-rand(vTextureXY)*0.3) * 1.6;
 
-	float lineCount = textureSize(uTexture, 0).y;
+	float lineCount = textureSize(uTexture, 0).y / uTextureScale;
 	fColor.xyz *= abs(sin(radians(vTextureXY.y * 180. * lineCount)));
 
-	// float columnCount = textureSize(uTexture, 0).x;
+	// float columnCount = textureSize(uTexture, 0).x / uTextureScale;
 	// fColor.xyz *=
 	//  clamp(abs(sin(radians(vTextureXY.x * 180. * columnCount)))+0.6, 0., 1.);