I've been wracking my brain and doing quite a bit of research now for quite a while, and have not found a solution to this problem:
I have created an elevation system. However, I have one problem that throws everything off; places with walls above them are opaque in every single floor. Since this is a multiplayer game I cannot simply make the walls non-opaque when the player is not in the elevation(s) with the walls.
I have tried to create my own opacity system, but that didn't work. My elevation uses layers and the invisibility variable to give the impression of different levels.
How would I work around this, or is there a simple solution that I am overlooking?