This .tgd file is 227KB. It is titled 'Uphill Test' and I used it to create the 'Desert High' image.
All the other model files are for vegetation which you can delete and add your own unless you happen to have those models. Primarily, the boulders are the feature which you can re-size if you like. The Voronoi Fractalized (by 'glen5700') which attaches to my fake stones creates the the cracks, fissures and pockets. Within the Crack shaders Group is contained three default shaders that control colors for surface, cracks and outer cracks. I think you'll find it fun to use. Also, you might try very slight displacements to the fake stones themselves; and, reduce reflectivity as suggested by Dune. Enjoy,
Bob
