I was working with "tiffer" last night and made a test pict to view my results. It appears that the last version I posted of the tiff to pgm converter won't convert tiffs saved from Bryce, so I worked on it last night so that the next version will. Anyrate the idea from my last post here seems to work - note the foreground left object: a simple distance mask of a sphere saved as a tiff and run through the converter and back into Bryce. A couple things I forgot to mention are illustrated here: note the ridge, as I exported it at 800 x 600 rather than an exponet of 2 (512x512 1024x1024 etc.). also see that the image height is inverted; perhaps you could invert in PhotoShop - or simply turn it over?. Also note the vertical exaguration - leave that one to you to figure out. of note to some - foreground right: a PSP8 8 bit conversion. also noted - background: a 16 bit tiff image Agent Smith supplied from Photoshop for testing purposes and a 16 bit conversion of it in Corel Photopaint. - TJ