A few months ago I was working on a modular system for a house which should be generated in unity procedural.
I did the entire design of the modules in Cinema4D. ( Below you can see excerpts from Cinmea4D).
In unity the tiles were then put together into one large room or rather many small rooms and corridors.
The whole thing was meant to be a kind of spooky labyrinth. in a certain way it should also look like a doll’s house.
References were Wallace and Grommet, where I always like the style very much.
To generate different types of peeling wallpaper, I built a small xPresso plugin in cinema4D. Here you can see how it can be customized.