Bikermouse, your experiment in post #18. I had done the same thing, and I should have included another little bit of info in my post #9. After making & rendering & saving a Bryce scene, exit Bryce, and go and delete the .bmp file to your corresponding .br4/5 file (this part we both did) But, here's what I did; I DID NOT double click the .brx file. I executed Bryce, and manually opened the file, results = white render screen. BUT, if you DO double click the .brx file to execute Bryce and auto-open the file, Bryce will automatically start rendering the scene. So, in my naive common sense...I would still believe that any .br4/5 file does not carry a thumb. And, if you can still find no reference to the corresponding .bmp file, then it is only the main Bryce executable that "knows" to open the "dragon.bmp along with dragon.br4/5" But, hey, this is all a big hunch by a non-programmer, lol. Take my ramblings with a grain of salt, please. AgentSmith

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