From e5b90d1137b6dda7470e659bc14b94a1a478e2d8 Mon Sep 17 00:00:00 2001
From: Mitch <60634216+MitchBriles@users.noreply.github.com>
Date: Thu, 3 Apr 2025 03:32:52 -0700
Subject: [PATCH] Fix mistake in 3-improving.md

`vertexPosition` would be undefined here.
---
 getting-started/3-improving.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/getting-started/3-improving.md b/getting-started/3-improving.md
index 0568cc6..3114cd1 100644
--- a/getting-started/3-improving.md
+++ b/getting-started/3-improving.md
@@ -56,7 +56,7 @@ void main() {
     vec4 lightColor = texture(lightmap, lightCoord);
     
     // Calculate our new fog color!
-    float fogValue = vertexPosition < fogEnd ? smoothstep(fogStart, fogEnd, vertexPosition) : 1.0;
+    float fogValue = vertexDistance < fogEnd ? smoothstep(fogStart, fogEnd, vertexDistance) : 1.0;
 
     vec4 finalColor = texColor * lightColor * vertexColor;
     pixelColor = vec4(mix(finalColor.xyz, fogColor, fogValue), finalColor.a);
@@ -65,4 +65,4 @@ void main() {
 
 Note the use of the `mix` function, which mixes the first and second color based on the third value.
 
-Once you reload, you should now see you have border fog!
\ No newline at end of file
+Once you reload, you should now see you have border fog!