But then why do I feel like such a moron for having to ask it? Don't do a lot of work in Bryce, but I like to play... working on a desert scene, and I want rolling dunes in the background. Seems easy enough... generate a terain using the Rounded Dunes fractal. Sure. It doesn't have EDGES! The dunes are cut in half and I can see under the damn thing! I am just not getting something here. Mountatins are easy, the come down to the ground plain. But this is making me crazy, and no where have I heen able to find this mentioned --- that's why I am feeling like a moron. Everyone has had to face it at one point or another, right? TIA Evil