>>278278336
You can actually do something crazy if you are just gonna use thier world.
You can make an avatar which drops a world object on load at the spawn point that perfectly aligns multiple planes that overlaps very slightly higher on the images on the portraits of the map and replace it with your own pictures that you prefer.

Rip the map and use that as base for the avatar system you have. So you don't need to recreate the map just place the overlays on it.