http://bugs.winehq.org/show_bug.cgi?id=12993
--- Comment #2 from Ambro ambro@b4ever.net 2008-11-04 06:44:08 --- I'm still having this issue in Half Life 2 Episode Two, Wine 1.1.7. The slowdown occurs e.g. when looking at water and is more severe when texture quality is higher.