Attached Link: http://www.chez.com/litst/los/sample_pack.htm

Have'nt tried Hawkins' shaders but you can get a few of the Lots of Shaders by litst at his site. He has around 10 or so rock & terrain procedural shaders in the pak & 1 or 2 in the samples. Bryce export would only work as an image to be used as a texture map.