>>720165218
Damn, ok anon. Sorry.
Yeah, a lot of users here have autism and that means massively preferring/hyper-fixating on certain things (usually things they stuck with since childhood), without understanding people may feel differently, or not as extremely, as they do, so they lash out.

Anyway, I think you likely do know what a pre-rendered background is, you just didn't know what it was called.
It's like in FF7 or Resident Evil 1-3 when the characters and some objects basically stand on top of a jpeg, essentially. Hope that makes sense.