Now, I know this is a weird idea, but how about this one: A kind of limited meta-ball system that fills up crevacess and riverbeds on terrains and then fuses into an object to simulate rivers. The metaball distribution could be set via a kind of viscosity-setting. I am still working on the theory, but it should work as long as only one terrain is used. But it does require rigid- and soft-body dynamics... Another think that would be nice, would be automatic distribution of plants, either by painting plant areas on the terrain or by height. Both options together would be preferable. A third idea was the lightdome that was described in an earlier posting on the forum. One thin Vue needs for sure, is an enhanced version of drop to terrain/floor, that automatically tries to place the object along the surface of the object, not only at the height-level of a certain point inside the object. Something like a conforming-drop-to-terrain. That's all for the moment, Joerg