As you can see in the attached picture i'm trying to model a floor plan/map of a building and import it into unity to make it a AR object where you can distinguish different rooms, the problem I have is that all the room divisions aka shared walls just melt into a same object when imported into unity. I tried the solidify option to then increase the thickness of the walls, but it just....doesn't apply. My mistake was to use "poly build" tool on the edges of similarly sized walls to just "extend them" and drag the edge or a "room" to become a new shape/room/wall to later extrude the planes into 3d objects. All shapes that are sharing a wall just become a unified object without a distinction between the "slices" of the same rectangle. Sorry for clunky description. here are some pictures and hopefully you get my drift.