Sorry I spoke too soon, I was just in an area with better framerate. Timeslice shadows make no difference. I'm using Catalyst 10.11.
My new theory is that it's due to PhysX being supported horribly/not at all on ATI video cards (PhysX is an Nvidia thing). For example when I try to enable PhysX in Arkham Asylum the game turns into a slideshow. At least Arkham Asylum lets me disable PhysX! I can't find a way to do this in Divinity 2.
If anyone could tell us how to disable PhysX we might get to the bottom of this. Thanks,
That's a good point - I have an NVidia GTX 295 (which is a dual SLI on a single card, fastest NVidia card I could get a year ago when I built my system), and I recent'y added a 9800GTX from an old PC to use as a dedicated Phys-X processor.
I noticed frame rate increases immediately on Phys-X games (Arkham Asylum was completely smooth, whereas it used to stutter occasionally in stereo-3D vision at full HD).
So even with fairly high-end NVidia hardware, Phys-X seems to be a drain...
