Well something I've realized is Octane has the best displacement tools. You can do it in any software, but elsewhere you have to subdivide the model at render time to get the proper level of detail and it slows things down dramatically. It doesn't work like that in Octane so displacements look great and are blazing fast.
Yup all these buildings came in that $2 set. They're just simple boxes up close and there are no UVs, but they took the time to laboriously lay them out into interesting designs. Definitely worth all two dollars lol.