http://bugs.winehq.org/show_bug.cgi?id=25045
--- Comment #1 from Piotr Pawlow pp@siedziba.pl 2010-11-06 09:13:17 CDT --- Created an attachment (id=31752) --> (http://bugs.winehq.org/attachment.cgi?id=31752) a hack to make the game work
Looks like the game doesn't like shader outputs to be clamped.
Attaching a patch, with the least amount of changes that still make the game work. Removing anything from this patch breaks the game.