yarp, I did a simple experiment. rendered a simple scene and then completely exited b5 and deleted the .bmp - reentered bryce5 by clicking the br5 file and the scene image still appeared in b5. so I'd bet the image is included somewhere inside the br5(brX) file. I don't know how you'll decode it for the thumb but apparently it's there - somewhere. I mean it could be retrieving the scene from windows memory but I doubt it. If you think of any simple experiments (that wouldn't take up too much time) I shoud be online sometime this evening. - TJ