Since you know so much, show me. I have asked about this often enough, and nobody has tried to tell me I am wrong. Not "convinced me". Nobody has tried to tell me.... >The zoom button work by changing the viewpoint's scale, >again, they don't actually do anything to the camera. And I have shown with pretty pictures etc that you appear to be wrong in your above statement. I think it would be far more useful if you presented your case, in the CAMERA analogy, than if you simply resorted to the sanctuary of sarcasm and secret knowledge. And I am sorry, I will take some convincing that Bryce is doing what it should, whatever it is doing, regardless of "what I want", given the camera analogy. Remember, what I illustrated is not the problem I have talked about. It is the reason I want the problem fixed. As far as Pan, Zoom and the camera movers are concerned, it does do what I want, but does it in an erratic way.