https://bugs.winehq.org/show_bug.cgi?id=26617
--- Comment #19 from Yuri Shishenko yurishish@gmail.com --- Black squares still appears in wine 1.9.1 and wine-staging 1.9.1. Enabling multisampling in winetricks and changing settings in game does not fixes the problem. Screenshot: http://i.imgur.com/UXhknY2.png
Squares disappears after switching to another program and back to the game (alt-tab) but then reappears during gameplay.
This wine output may be related: fixme:d3d:wined3d_debug_callback 0x32f0de0: "Program undefined behavior warning: Sampler object 41 has depth compare enabled but is bound to a non-depth texture, and used by a program that samples it with a shadow sampler. This is undefined behavior.".