Here's a technique I devloped for converting cubic faces into equirectangular images all those years ago, using only bryce and photoshop: http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=1155039 Here's a new ocation for the file upload, as renderring has been lost somewhere along the way... http://www.3dfightclub.com/~madmax/uploads/files/hdrconversion.zip It can also work in reverse, to turn bryce scenes into .hdr files. I'll make a tutorial up right now.