Glad the OpenGL changes worked for you. I know only enough about OpenGL to be dangerous but it is the thing (protocol, system, whatever) that is responsible for creating the 3D appearance. SketchUp is designed to work well with the nVidia chipset and OpenGL and for other graphics adjustments have to be made. The specific combination of adjustments seems to vary between machines and graphics driver software revisions. I would imagine you could get better info if you search OpenGL here on the forum.