i also tryed to make a very small and simple, 1 mountian, ter with terregan (great program btw) but still the same, some errors or strange repeating peaks and in negative?
there was an error in dispgen with images of odd number size, could be that?
When I make it a vmf, instead of being islands etc, I just have a large bump in the middle and the rest is flat
Can you post some image of your terrain in hammer or compiled? Could be the same problem, if input image in dispgen is not even numbers there could be output errors.
Shouldn't be problems importing or exporting heightmaps from far cry editor. If I remember correctly, because I uset it some time ago. This is a height map made upon a DEM and converted in sandbox:
Much better engine for realistic terrains