You’ll notice that it’s not ortographic, since the walls in each room are all angled outwards, and perspective would work only on one room, but not for the whole set.
You cant. Only if you deform level mesh. Its just a picture, not real 3d scene. The perspective is inconsistent and camera cant render different in different parts of screen.
I agree with battou - as far as my limited knowledge is regarding 3D cameras, but it’s a cool look.
If you were only rendering this as a map, or image - this could be accomplished with your solution - render with perspective camera one room at a time then composite them together.
Don’t know if that could be done real-time or not, but would be a really cool thing to prototype.