Here are some very early screens of a new map by me and cBass. We are working on it and should have it ready for this weekend. Screens are taken from terragen. Any suggestions?
Unfortunately Terragen does not create true skyboxes. The sky that you see is a single plane that has been warped downward on the edges to approximate planetary curvature =\. I'm sure that you could probably adapt it into a skybox some way or another, but you can't pull it straight out as it is.