Thanks for these points alex, some good ones here. Particularly about the border artifacts - I keep forgetting about the 1.01 scale solution to this. In the render I posted, this truly was a 16 bit TIF heightfield. not 8 bit or TGA, but the moire problem resolved completely on switching to bilinear interpolation. I'll try bicubic as well.

You can, of course, also import several different terrains from GC2 and use them as you would multiple native Vue terrains. By turning on zero edges you just get the central part of the GC2 terrain; I sometimes do this because IMO the GC2 mountains can be better than Vue mountains, but it's really a matter of preference.

Steve