diff --git a/shaders/tag.fs b/shaders/tag.fs
index a7bf4cc..118bc1a 100644
--- a/shaders/tag.fs
+++ b/shaders/tag.fs
@@ -26,8 +26,7 @@ void main(void) {
 
   vec4 color1 = texture(tex0, vsoTexCoord);
   vec4 color2 = texture(tex1, vsoTexCoord);
-  float fadeFactor = smoothstep(fadeStart, fadeEnd, 1 - vsoTexCoord.x);
-
-  fragColor = phongIL * mix(color1, color2, fadeFactor * fadeAmount) + ispec * vec4(1);
+  float fadeFactor = smoothstep(fadeStart, fadeEnd, fadeAmount / vsoTexCoord.x);
 
+  fragColor = phongIL * mix(color1, color2, fadeFactor) + ispec * vec4(1);
 }