Hi, Yep it gets to a certain point and then 'zoom', just shows those vertical lines. No I am not scrolling in the window. It actually freezes the render.... the little animated man dies and it doesn't finish the render. Ok I have 350 meg of memory, Poser 4.03 patched and I haved rendered complicted scenes plenty of times, but this is happening on all the trees in the mini pack I have just bought and it also happens occasionally with 3ds and objs files I import. Hence I'm stuck on ideas here.... I was wondering if I needed the Pro Pack or something, but there was no mention of that when I bought the forest mini pack and I can't think of why it would happen with imported items. Help or a fix for this would be appreciated...