Nice! I’ve been meaning to do something similar with David Goodsell’s Illustrate (https://github.com/ccsb-scripps/Illustrate) but sadly haven’t progressed much.

Thanks!

Shouldn't raymarched sdfs be perfect for this? Simple primitive based geometry (spheres, cylinders) with no textures. I'm just wondering because the rendering from speck/modernspeck seems kinda splotchy, and that should be avoidable?

It should be avoidable even with the current approach based on impostors. The splotchy look seems related to how the AO is computed.