https://bugs.winehq.org/show_bug.cgi?id=31393
--- Comment #17 from Ruslan Kabatsayev b7.10110111@gmail.com --- (In reply to Henri Verbeet from comment #10)
Yeah, we only support MSAA at the moment, no CSAA or SSAA.
Actually it seems that simply requesting 9 samples results in choosing a mode equivalent to __GL_FSAA_MODE=11, i.e. 4xSS+4xMS, so it seems Wine doesn't have to implement any of CSAA or SSAA to make this work.