[Bug 27600] Screen fills with visual artifacts in World of Tanks.

http://bugs.winehq.org/show_bug.cgi?id=27600

--- Comment #8 from Vincas Miliūnas  2011-07-17 03:24:47 CDT ---
The graphical artifacts were fixed by
http://source.winehq.org/git/wine.git/commit/cf421e1b3f29c0df242f43bc235dab1...

However, the noted in the original post performance degradation is still
present and it's the same fixme message that comes with the poor performance:
fixme:d3d:wined3d_buffer_preload Too many declaration changes or converting
dynamic buffer, stopping converting

Disabling GL_ARB_map_buffer_range or it's usage fixes the problem.

It also looks like it's present only in some of the maps, because the 1-2fps
slowdown occurred only in the second map I played.