Using the red and green channels of an image to store non-visual information (in this case, offsets) is a really great technique because it lets you paint data in Photoshop, but the downside is that it is the ugliest fucking thing in the world while you’re doing it
Also huge shoutouts to the SSSS Gridman OP that this is from https://www.youtube.com/watch?v=IMVH4bvG5GM
@christinelove woah that's really clever
@christinelove That is amazing and genius. How did you code it in particular?
@alice The shader adds the value of the R channel minus 0.5 to the screen texture's U, and the G value minus 0.5 to the V. So if you paint with the colour #808000 it'll draw in the normal place—less red and it'll move leftwards, more red and it'll move rightwards, etc
@christinelove Oh of course, very nice!
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