Rob, Thanks for the response. Understand impossibility of featuring support for every card's OpenGL issue - and in this case if it is indeed lack of hardware overlay planes, there's probably no real fix, at best just lifting the level of pain, until it bites anyway at a higher level of scene complexity. But what about the idea of just making the controls optional via a Preferences setting? That way Studio would still be usable on all of these cards. Of course the option would have to prevent all calls to overlay routines, not just make the controls entirely transparent ;-) But then Daz' message on OpenGL would be that you need a later OpenGL card implementation to fully support mouse manipulation of scense, vs. current message which has to be, you need later OpenGL card to even use Studio.