Artist website: https://www.erickingraham.com/

good point, will reach out! best to go straight to the source :)

There are ML upscalers optimized for illustrations you can run locally for these scenarios. Doesn't require bleeding edge hardware either.

true, good idea. got an RTX3080 at home and tinkered around with stable diffusion when it came out. maybe that's my first genuine use-case after all this time. i first want to contact the artist, though. as far as i understand, artists tend to be weirded out if people start AIing their work.