The file desolat.pov contains a script to render the main parts of
the image excluding only some objects from the interior of the tower.

The heightfields must be rendered first:

   hf.pov  at 640x480  -> hf.tga
   hf2.pov at 1024x768 -> hf2b.tga
   hf3.pov at 640x480  -> hf3.tga
              1024x768 -> hf3b.tga

