In my experiments I discovered a way to take objects and pull the terrain over them, like a blanket! Being a nerd and all I decided to call it "Geoblending" like in Halo...shhh, no one will know
But it is actually really easy to do! But be warned, I am not aware if sims will be able to use the objects still. I would bet money on no, but I am one of those unlucky people who get crashes when trying to play a sim.
Without anymore intoduction type stuff, I present you with geoblending!