Originally published at: http://boingboing.net/2017/01/31/draw-your-own-nebula.html
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In Photoshop. Image mode grayscale. Then Image mode bitmap (diffusion)
The nebula is another matter.
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My god, it’s full of carpet!
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Photoshop uses Floyd-Steinberg dithering (I think). The link uses Stucki dithering, which gives a slightly different result:
I think it looks nicer, but that’s just my opinion.
There’s a nice summary of some dithering methods here.
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