http://bugs.winehq.org/show_bug.cgi?id=26545
--- Comment #3 from blaise mgavl69@juno.com 2011-03-30 17:07:22 CDT --- (In reply to comment #0)
Bumpmaps are highlighted in red. This goes goes the sky as well as objects.
In the autoexec.cfg in the base install directory set r_ColorGrading=0
That solves the problem.