Break out of both loops.

src/pixie/images.nim

@@ -365,6 +365,7 @@ proc spread*(image: Image, spread: float32): Image =
   for y in 0 ..< result.height:
     for x in 0 ..< result.width:
       var maxAlpha = 0.uint8
+      block blurBox:
         for bx in -spread.int .. spread.int:
           for by in -spread.int .. spread.int:
             # if vec2(bx.float32, by.float32).length < spread:
@@ -372,7 +373,7 @@ proc spread*(image: Image, spread: float32): Image =
             if alpha > maxAlpha:
               maxAlpha = alpha
             if maxAlpha == 255:
-            break
+              break blurBox
       result[x, y] = rgba(0, 0, 0, maxAlpha)
 
 proc shadow*(