this post was submitted on 27 Jul 2025
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unix_surrealism
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is that a bumpmap or cosmic background?
The background is made from a plain purple color with added HSV noise. Then an effect is added on top of everything by copying the entire image into a new layer and applying a convolution with a kernel like this:
In GIMP those are under "filters > noise > HSV noise" and "filters > generic > convolution"