I have encountered when applying some odd image for a texture, Bryce 6.1 would crash. It is not Bryce (or could be), that is the problem. It is the image itself. I found out if in 32K, 64K, less or other than 16 million, and wrong image scale (512x512 for example), Bryce will crash. Take the image formats and increase to 16 million and "jpg". It will help.