From 2a3a69752a0e0c871a4656cd7f0da077760a30d5 Mon Sep 17 00:00:00 2001
From: aashu2006 <akshatp439@gmail.com>
Date: Wed, 11 Feb 2026 02:02:24 +0530
Subject: [PATCH] Fix pixel indexing formula in Optimizing WebGl Sketches
 Tutorial

---
 src/content/tutorials/en/optimizing-webgl-sketches.mdx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/content/tutorials/en/optimizing-webgl-sketches.mdx b/src/content/tutorials/en/optimizing-webgl-sketches.mdx
index 4ac1aafd50..08877c0cac 100644
--- a/src/content/tutorials/en/optimizing-webgl-sketches.mdx
+++ b/src/content/tutorials/en/optimizing-webgl-sketches.mdx
@@ -457,7 +457,7 @@ function draw() {
   loadPixels();
   for (let x = 0; x < width; x += 1) {
     for (let y = 0; y < height; y += 1) {
-      let idx = (y * height + x) * 4;
+      let idx = (y * width + x) * 4;
       let newValue;
       if (pixels[idx] + noise(x, y)*50 >= 220) {
         newValue = 255;