kburts wrote:ubuntu
the texture is pretty much just desert
you should probably be able to do lasso select + gaussian blur in gimp too.
ugh, i dont know about tex making in linux, maybe check if bryce has a linux version? AFAIK its free now.
if you texture by hand, definitely differentiate heights in some way, mabe use portions of the heightmap as a transparency map and blend different textures together with that (needless to say, with smooth transitions and maybe with a bit of noise added to the mask). theres a lot of nice texture repos online, you should be able to find nice rock and sand textures.
As far as the heightmap is concerned, I would advise making the style of the heightmap fit your biome (in this case, desert). the current heightmap would only go as a metal map, or an abstract KP map. It is much to sterile otherwise.