Extremely slow 3D perspective camera view regen

[patricks]

I'm not sure what's going on, but suddenly the 3D perspective views in this 15 MB Revit file take FOREVER to regenerate after moving the camera. Just now I rotated the camera around while in the view, and after extremely jumpy/jittery movement, it sat there and took a full TWO MINUTES thinking and regenerating before letting me do anything!

I've never had view performance issues like this before, even on MUCH larger projects.

The only thing I can think of that has changed is that we decided to bind our linked site file, and re-link the CAD survey. So now my topo and pads are all in with the building, and the CAD file is linked into this file (instead of it being a separate site file).

However all the site stuff is on a separate workset that is off, and the CAD file is on its own workset that isn't even loaded, and yet the 3D views are still lagging as I described.

Could it be the CAD file that's causing this? The CAD file is only about 350 KB. I suppose I could just stick the CAD file into its own blank Revit file and link that Revit file in.

[patricks]

Oh yeah, another thing I tried today was moving the QAT down below the ribbon again, because I'm only on a 1280x1024 display and I have quite a few tools on the QAT. I got a Windows hard "stop error" earlier today, a.k.a. blue screen of death, and had to reboot my system. The BSOD said one of the nVIDIA DLL files was at fault, but I don't know if that has anything to do w/ QAT location or not.

I have moved the QAT back above the ribbon, but still no change in 3D perspective performance when trying to move around in the view.