this post was submitted on 27 Jul 2025
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unix_surrealism

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"The Everything Manual" page 256 (sopuli.xyz)
submitted 2 months ago by NoFood4u@sopuli.xyz to c/unix_surrealism@lemmy.sdf.org
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[โ€“] lime@feddit.nu 14 points 2 months ago (1 children)

is that a bumpmap or cosmic background?

[โ€“] NoFood4u@sopuli.xyz 15 points 2 months ago

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:

-1  0  0  0  0
 0 -1  0  0  0
 0  0  1  0  0
 0  0  0  1  0
 0  0  0  0  1

In GIMP those are under "filters > noise > HSV noise" and "filters > generic > convolution"