http://bugs.winehq.org/show_bug.cgi?id=13610
--- Comment #6 from Lorenzo Miniero rainmaker@icgag.it 2008-06-07 06:09:56 --- Just some additional details. It looks like not only the characters and the sky have this problem. I've seen the game running under XP, and I could verify it happens also for at least:
* the main menu (in Wine only an orange fog is visible on a black background, but in the game there's actually a static picture under the fog); * the loading screen (in Wine you can only see some small coloured circles lighting on, while in XP these circles are part of a drawn dragon medallion).
So probably the same bug affects many parts of the game. I can also confirm that the bug is still there with rc4.