Hi,
I found a new way to crash TG2 : when using a function noise (either voronoi or perlin) with a color adjust shader and use it as a displacement function, terragen crashes when i it the render tab.
When i try to render it, the ground is completly black (and sometimes i get an "unable to allocate pixel map" error) and the global memory usage rise to 2gb.
But if i disable the shadows it renders correctly.
I think I've found the cause of this and it will be fixed in the next update.
Matt