This is from Snowball Lam’s excellent concept: https://www.artstation.com/artwork/rALkQO
I learned a lot on this one. Adding different materials for the different outlines, changing the shape of the outlines to push through other geo to be more visible; complete-cheese-faking some stuff. It was great to work out the small challenges and then finally get to slap some big, poster paint on it!
I actually found jumping in and out of Sketchfab quite useful, too. It was a pain to get used to but was representative of what it would look like.