A couple minutes to test again... I'm seeing the same sluggishness with V3, with a bit more responsive hand camera but a really slow posing camera (it seems even slower than V4). Is it possible that the chain length from the camera up to the universe, as seen from the Yerarchy window, could lead to this? As I seen it, the longer it is the slower the preview is... If so, then the problem isn't in the graphic subsystem, time to go shopping for a more powerful machine (and 150$/gig RAM sticks :D). Thanks again :)