We've all played some kind of 3D game at one point in our lives, so I think we are all on the same page already.

I'm considering attempting to develop a First-Person Shooter game (That's right, not in BYOND -- *gasp*). I've been curious for a long time about how exactly these 3D engines work (E.g. displaying walls and floors at the correct angles), but I haven't been able to locate any sites on the topic. I was wondering if anyone knew of any decent resources on how this is done. Not how it is done code-wise, but just generally how they work.