diff --git a/packages/partner/paint/src/paint/image/pattern.ts b/packages/partner/paint/src/paint/image/pattern.ts
index ac38ab85..ca67cab4 100644
--- a/packages/partner/paint/src/paint/image/pattern.ts
+++ b/packages/partner/paint/src/paint/image/pattern.ts
@@ -45,7 +45,7 @@ export function createPattern(ui: IUI, paint: ILeafPaint, pixelRatio: number): b
             if (maxSize > imageSize) maxSize = imageSize
         }
 
-        if (size > maxSize) imageScale = size / maxSize
+        if (size > maxSize) imageScale = Math.sqrt(size / maxSize)
 
         if (imageScale) {
             scaleX /= imageScale