Hi

I'm trying to figure out if there's a way to totally flatten certain areas of a procedural terrain. 

Using the altitude or flatten brushes in the terrain editor manage to flatten it only until a certain point. If I try to do the same in a zone, they won't manage to get rid of all the little spikes, no matter what.

I thought this could be done by connecting a mask bitmap to the terrain fractal function, to mask out the areas where the fractal shouldn't operate, but couldn't figure out how to do it.

 

Any ideas?