diff --git a/src/sample/imageBlur/blur.wgsl b/src/sample/imageBlur/blur.wgsl
index e19d4615..07f5631e 100644
--- a/src/sample/imageBlur/blur.wgsl
+++ b/src/sample/imageBlur/blur.wgsl
@@ -51,7 +51,7 @@ fn main(
 
       tile[r][4u * LocalInvocationID.x + c] =
         textureSampleLevel(inputTex, samp,
-          (vec2<f32>(loadIndex) + vec2<f32>(0.25, 0.25)) / vec2<f32>(dims), 0.0).rgb;
+          (vec2<f32>(loadIndex) + vec2<f32>(0.5, 0.5)) / vec2<f32>(dims), 0.0).rgb;
     }
   }
 
diff --git a/src/sample/imageBlur/main.ts b/src/sample/imageBlur/main.ts
index 6b142a68..b2d63ce4 100644
--- a/src/sample/imageBlur/main.ts
+++ b/src/sample/imageBlur/main.ts
@@ -222,6 +222,8 @@ const init: SampleInit = async ({ canvasRef, gui }) => {
 
   let blockDim: number;
   const updateSettings = () => {
+    settings.filterSize += 1;
+    
     blockDim = tileDim - (settings.filterSize - 1);
     device.queue.writeBuffer(
       blurParamsBuffer,