Interior Mapping is a technique that renders the interior of a building when looking at it from the outside without the need to actually model or store this interior.
This technique is used in games like Grand Theft Auto, Saint’s Row, Superman Returns and Spiderman.
I was able to simulate the original technique through the Blender nodes. Here the result:
The original technique is written directly in the shaders and has the advantage of also writing the depth component, which is useful for intersections and shadows.
I intended to do a tutorial, but it would be very extensive (and complex).
So I share here just the blend file with the material for you to test:
Texture_Fake_Rooms.blend (747.4 KB)
It was an interesting challenge, enjoy it.