Of course it can be used as BG picture (though this size is original res. took already almost 1/2 an hr to render on my poor old steam engine) the terrain could be exported to obj, but will never look like this in
Poser.
And they get really big. This 513x513 one would count about 500000 polys
All this is hypothetical, of course, for I didn't save the terrain and the scene. I almost never do. I like starting from scratch