https://bugs.freedesktop.org/show_bug.cgi?id=37171
--- Comment #15 from Sven Arvidsson sa@whiz.se 2011-06-09 04:02:32 PDT --- Wine checks for ARB_shader_texture_lod to enable SM3.0 now, doesn't it?
So using something like MESA_EXTENSION_OVERRIDE="-GL_ARB_shader_texture_lod" would cause it to fall back to 2.0?