http://bugs.winehq.org/show_bug.cgi?id=11583
--- Comment #22 from lolguidos lolguidos@gmx.com 2010-09-10 22:17:06 CDT --- (In reply to comment #21)
I can only assume that I'm experiencing the same bug everyone else here is. It's certain special effects. In the image above it's all the spell effects, with rain disabled. The rain makes it even worse, but at least you can disable the rain. I think it also affects gameplay because the portal didn't work after I defeated the enemies in that section of Mysteries of Westgate.
I just realized that I neglected my system info.
Slackware 13.1 x86_64, 2.6.33.4, fluxbox 1.1.1, AMD Phenom x4 955 @ 3.4GHz, Nvidia GTX 260, Auzentech XMeridian, Gigabyte GA-790XTA-UD4, Viewsonic VX2433wm
Wine 1.3.0 using Alienbobs multilib. NWN2 ver. 1.23 The picture I posted was my party fighting a lich named kokrulobis in the flaming house quest at the beginning of Mysteries of Westgate.