Some good suggestions and it never hurts to hear what others thing because , even if we think we know something already, a slightly different technique can make all the difference - and can prompt us to think of our own new techniques.
I have Instant Road Nui but it doesnt seem to do verticality very well. Its more about draping than actually setting out a vertical spline for a road to follow. I can get a decent result by creating my own curve then Upright Extruding a road profile along it.
Preparing a 2d site plan (urban blocks and streets) and then push-pulling the blocks up to the desired height is easy and quick (if you know all the technical parameters of slope, orientation, access, retaining walls and batters, drainage and other constraints…so it’s a bit of mental gymnastics!).
This screenshot shows a tiny fraction of the development proposal.
@Box Thanks for the workflow ideas,…this is helpful. I think your Points+SubD method is the closest I can get in a semi automatic function.
I’m going to try overlaying a grid of points and seeing if that gets a better result due to having a finer grain/resolution. I may also try a few tricks like using Copy along Path to create objects (points) in places that I want more detail/edge definition.
Toposhaper looks useful too… Man I am getting a crazy amount of extensions installed…!
At the moment I’m using Surface from Contours combined with some manual flipping and shifting, then Sub D and Smooth.
Building contours on a SubD model sucks…migh have to try Toposhaper for that, too.