Hi, – It's possible to enter playmode, but yes, Beautify unfortunately doesn't work in it. – Unfortunately, that's all there is. Just two lines of the error, no stack trace. The assertion error shows up when entering the playmode, no stack trace either. – I see no errors when I select BeautifyCore.shader, but the preview appears pink. (!!!) Reimporting it fixes Beautify in the Scene View and the Graphics.Blit errors disappear, but it still doesn't work in the playmode, only partially. I.e. I added an over the top vignette – which does appear in the playmode, but tonemapping is gone (see the last two gifs).