Hi there, regarding the original question: Vue4's OpenGL viewports are recognised to be among the slowest in the industry (at least among the several dozen people of the industry I regularly talk with ;) ), especially on NVIDIA video boards. For most people, the standard, non-OpenGL viewports will work a lot faster and with less artefacting. I am with Pete on that one--I simply don't see the point. The shading makes more complex scenes almost impossible to navigate in, and well, it's slower than the software mode, something I have yet to behold even with freeware render and modeling applications. But as you can simply turn it off, it's not too much of a problem. ta, -Sascha.rb