Unzip them to a common directory.   The .tif files contain a topography as a grayscale image, and the .rgb file contains a texture map. Use tif_to_orog.exe with 10 m pixel size to create the topography. Then edit the .cfg file to use the new files.
 

 2dFzcone_shade.zip - the results of the deep space 2df galaxy survey, mapped as a topography.
 The light pixels indicate a galaxy, and the topography is the result of a low pass filter of the light pixels.
 This is supposed to simulate the gravity field in deep space. The scale here is about 1 billion light years   across the image.

 blood_513.zip - an AFM (atomic force microscope) scan of two blood cells on a CD
 hawaii_513.zip - some mandelbrot fractal stuff
 home_fly1.zip - the area around my house near Santa Cruz
 mars_home_red_1025.zip - the Nirgal Vallis area of Mars
 pq3531_topo_map_1025.tif.zip - a topo map of Zion's park in Utah
gold_part_257.zip - 20 nanometer sized gold particles from and AFM scan.

Feel free to write me if you have questions. taylor@surfnetusa.com