Can you get singular objects (not populations) to sit on terrain or
can you move singular components of a population while they sit on a terrain?
Neither one is currently possible, unfortunately. But both are being considered for future versions.
- Oshyan
Well, at least 1 good method of getting single objects to sit on terrain would be to just grab the coordinates of where you want it to sit by right-clicking in the 3d preview. It isn't quite the same as using the function embedded in a population, but it's a decent workaround.