Happy to help man, lemme know if you have any other questions.

Thanks!

So... the secret to the round paths: Flat roof peices colored to closely match the path your using it on. They need to apear under the path, even tho technically they will be at the same height as the path. If you select the roof and place it on a path tile, and it covers up the path; adjust the height up or down a few units then back to the path height, and it should now apear under the path.
Beyond that, you'll find that the roof peices extend further than the paths(roofs fill the full tile with an even square, paths are slightly smaller than the full tile). When you place a curvey corner roof peice, you'll need to place 3 more square roof peices under the surrounding path tiles, or you end up with a gap. I tend to place square roof peices under all path tiles, otherwise it's kinda noticable where you've used it.

How are you doing the curved paths? I can't seem to get roofs to cover the path properly

Ok, great! Will Donload :)

No mods used. It's all stock assets. Glad you like!
(I do use a couple camera mods, I don't think the screenshots show views from those mods. And they're not necessary.)

Did you use mods? If so, can you leave a list?

Nice! :)