what?
the land directly underneath the foot print of a building will have to be leveled. But the design as a whole can be circular from above without being
two dimensional.
Irregularity in land is something to be cherished and optimized, once you get rid of the natural aesthetic of irregular land its hard to go back and flat flat will never appeal to most people as much as minor changes in elevation.
I don't try to guess at land forms with these designs, and autocad doesn't do
very good for terrain mapping, tho i can do it.
I have seen a lot of "Developments" that level the whole site, I would hope that we could be wise enough not to do that.