Creating environment UVs isn’t hard, per se. It’s usually just planar UV projections on flat surfaces. The trick is properly creating UVs that take advantage of tiling textures. Here’s a short video that lays out what you need to know!
Brick walls, sidewalks, concrete, etcetera
If you need a primer on UV basics, check my other UV tutorial. That tutorial goes more in-depth on using Maya’s UV unwrapping tools.
This tutorial focuses on environment UVs, and assumes you already know that stuff.
Other kinds of environment UVs and textures
I don’t mention decals or overlay textures, at all. A tiling texture is usually missing out on those kinds of details – and to use them we usually end up with multiple UV sets. I’ll tackle those topics in the future!
Environment art series