ℹ️ As of July 2025, using the blur filter no longer works. This is not unexpected since it was never explicitly supported by Scratch to begin with. Click the green flag and watch a comparison of two methods for blurring a costume without using code*. * This project does use code, but only for animating the sprites. The code has nothing to do with the effects themselves.
The SVG "hack" method creates an accurate blur at any amount you want, but requires downloading and editing the costumes in a text editor. Learn more about this method in the original project: https://scratch.mit.edu/projects/484455893 The costume size trick is something I came up with when looking at the original project now, suddenly recalling that extremely large vector images get blurred. Unlike the SVG "hack" method, this is achieved without leaving Scratch. Unfortunately, the quality is questionable, it is not very versatile, and getting the positioning of the blurred image right requires some fiddling with the width and height of the surrounding transparent rectangle, but perhaps someone can find a use for it anyway.
