I had thought of the 16-bit version as well. I must be doing something wrong. When I save a file as a 16-bit grayscale in TIF format, it will load into Bryce in the terrain editor but doesn't seem to make any visible difference. I read in the the Photoshop help files that PS can do HDR images in 32-bit but unfortunately when I try to load them into Bryce I get this error: "An unexpected error has occurred (generic failure)"
   Tell me more about Dogwaffle, please?