'Morning Bop, Gebe & Hisjoy . . . In this scene I've got: Imported objects = 28 / Native objects = 55 / Native Boolean Difference objects = 5 / Lights = 6. I keep my system defragged when needed & I have nothing running in the background, except for Systray & Explorer. I think someone just did some testing here lately on what slows Vue 4 down. I believe they came up with: The number of polygons isn't what slows Vue 4 down - I believe they said it was more the number of objects. Someone will correct me if I'm wrong? I'll have to give it a try myself, when I have the spare time. Have a good one . . . Mark. :^)