http://bugs.winehq.org/show_bug.cgi?id=33964
--- Comment #2 from Henri Verbeet hverbeet@gmail.com 2013-08-22 07:55:14 CDT --- It does sound a bit like a software fallback somewhere, but I'm not sure the limited hardware capabilities are enough to explain that by itself. Before the commit in question it would use ARB_fragment_program based shaders, which should have had much of the same issues in that case. Does running with INTEL_DEBUG=perf give any interesting output? Also, could you attach the output of "glxinfo -l", just for reference?