xantor, I haven't released the pgmtotif yet except to Agent Smith, I guess I should finish that up for the rest of you; I haven't felt real energetic for the last month or so. Hope I get over that soon. It shouldn't take more than a week once I get to it. The new parser solves most of the problems except with infranview which uses 256 color as a greyscale, but I'm thinking about that too. Meanwhile, if all you need to do is convert a pgm to an 8 bit greyscale tiff PSP might do the trick or perhaps even infranview. I'd think if you only wanted the picture as a greyscale it would be just as easy to do using the Bryce generated bmp and convert it to a greyscale in Photoshop or other paint program. For height map of your whole scaene you might try top view, distance mask, render it, export as tiff. I haven't tried tiftopgm on such a .tif (but the new parcer most certainly will handle it when released). If it doesn't work, either save it in photoshop as a .tif or simply use psp to generate an 8 bit .pgm. you sould then be able to convert your pgm (mask) to .3ds,.obj etc. in Bryce. I haven't tried all of this but it should work - although you will certainly get some distortion unless you know how to compensate the height map in Bryce.