The good old xscreensaver has quite a few which I really want(ed) as high quality prints, e.g. "Substrate[1]". I never got around to making it render into a file, and the screens were too far from 4K back then to make screen grabbing useful. Plus I was too afraid to bug jwz himself :).

1: Crystalline lines grow on a computational substrate. A simple perpendicular growth rule creates intricate city-like structures.

https://duckduckgo.com/?q=xscreensaver+substrate&iax=images&...