cheers
I've got a few days off work owed to me, so I think I'll be doing some more work on this after this weekend.
I was actually quite impressed by the speed I got from it on my PC. I get about 1300fps on a 7800GTX and Athlon 4400+ X2.
@Skalex - I think the reason for that is because I'm using the default "sphere" object which has all the triangles at the top and bottom converging on one point which causes all kinds of texture wierdness. I might have to make a specific "earth and atmosphere" object. It probably needs to be made more like a very high res "football" (soccor ball) shape, using lots of tesselated hexagons, although when you make hexagons out of triangles, you'll end up with lots of convergance on single points :-(
I also see a horrible seam in the middle screenshot - need to look into why on earth that happened.... Looks like the bump/normal mapping made the sphere lose its normals :-( I'm starting to think the best way for this to work would be to find a decent and easy to use Normal Shader from the Shader thread. Anyone know any off hand?
Cheers for the comments guys and gals
Nick