If you haven’t already, Fabien’s write ups of the various ID engines are a joy to read: https://fabiensanglard.net/quake3/index.php

Shameless plug: I also like to play around with old game engines: https://github.com/bishopdynamics/Continuum

I remember asking someone who worked at my high school for a map of the school and remember thinking it would be fun to recreate the school... in quake... and probably model my least favorite teacher as a monster I could chase...

it's somewhat scary to think back about this - especially since Columbine happened the same year. there was no risk from me (absolutely no way or interest to access guns - we were teenage dweebs in a country with strict gun laws) but thinking back I'm glad I never finished my maps or shared them.

[0] https://www.macintoshrepository.org/6370-quiver-1-2-quake-ed...