https://bugs.winehq.org/show_bug.cgi?id=36828
--- Comment #4 from Luke gaming4jc2@yahoo.com --- (In reply to Anastasius Focht from comment #0)
Maybe there will be a command line option with a later game update, that allows to force the game into 'DirectX10' feature level.
It didn't work on the demo I just posted, but I wonder if passing -dxlevel would work on some games. Worth a try, see here: https://developer.valvesoftware.com/wiki/Command_Line_Options