The "missing" objects and details in orbit/explore is simply a setting that can be helpful (or not). =
3D Window Settings\Options\OpenGL Options:
The bottom slider ("Always display all elements located within the following radius") simply means that when you MOVE (orbit/explore) until you stop or pause a brief instant,
the movement information won't be calculated for the GPU within this radius (vs. outside it- strange but...).
-
So when you MOVE the 3D view, these things within this radius are NOT drawn until you pause/stop.
To speed the movement up and take some of the load off the GPU, turn it way down: when you move the view only the basic elements will be displayed while moving, and
won't be rendered
till you pause an instant (hence the see-through objects and missing doors-windows, stairs, GDL stuff, etc...
To make everything never disappear, turn it the slider all the way up to the right, and it will render everything constantly. Make sure you've got a fast GPU!!!!
....Experiment with moving the slider and then exploring or orbiting the model in 3d- try it at 100 and 5000 for reference...I think the default is 2000? My 7900 GS can handle it all the way up on very complex models, your model ought to be similar or identical; you've got a fast enough GPU that you could set it up quite high- and it will ALWAYS calculate everything within the view up to whatever number you set (5000 no problem unless you're really making some hefty models)....
If you want things to ALWAYS be drawn turn it up all the way.
For jerky movement, the FPS might be too low... turn them up. This is the slider above- default is 10 or 25 (max?)
You can also remove/check/uncheck the boxes like so...
[ ]Highlights
[ ]Emission
[ ]Smooth Surfaces
Textures
That can help speed things up, or take a little load off the GPU and CPU for faster 3D movements.
... I think you can customize this max fps in the registry- I'll post if I find it. The Nvidia 7800+ and nice memory on it ought to be able to handle the MAXIMUM settings no problem, at 60 fps unless one has like 1000 GDL objects, wot?