Hole in a terrain

I would like to have a terrain like a doughnut, empty in the middle - is this possible? I know I can use the earth moving tools to depress the earth, but I want it gone completely - just empty space. Possible?

I think you mean a hole in the terrain boundary. This is not possible right now, since the terrain boundary consists of just one closed curve. As a workaround you could create a single curve that includes the hole and set it as the terrain boundary:


It’s tricky because the _laTerrainBoundary command won’t accept self-intersecting curves, so you must separate the coincident points before calling the command. Later you can edit theterrain grip points and make these points coincident again.
Obviously, that’s just a workaround, not a true solution.

OK thanks for the advice.