https://bugs.winehq.org/show_bug.cgi?id=37840
--- Comment #2 from Ryan ryanskingsbury@alumni.utexas.net --- I believe I'm also experiencing this bug, although the artefacts look slightly different and are most noticeable on cave walls and skin. The registry setting fixed the issue for me.
I'm on OpenSUSE 13.2 x64, NVIDIA GTX 750Ti with 340.65 driver, and the Steam version of the game.
See attached screenshots for examples of the artefacts I'm seeing.