CAESAR II uses the HOOPS library, from Techsoft America. As I stated previously, check to ensure you are using the latest driver for your graphics board, and perhaps change the number of colors used. If neither of these suggestions solves your problem, send me the specifics of your graphics board, so I can inform Techsoft. Perhaps they have an issue with your particular graphics board.

As to your "reset" / "zoom" issue, have you set the global coordinates for the first node in the model? If so, what values did you use?