This project was fun and challenging. Well, it was a lot of little projects for some terrain modeling I wanted to do. And I learned a lot about the different tile patterns used in paving.
It's all up on DriveThruRPG https://www.drivethrurpg.com/browse/pub/13376/Impossible-Emporium
and https://www.thingiverse.com/jlerossignol/designs