https://bugs.winehq.org/show_bug.cgi?id=38138
--- Comment #9 from Henri Verbeet hverbeet@gmail.com --- (In reply to Paul Gofman from comment #8)
Created attachment 63280 [details] Use 8 bit value for D3DRS_ALPHAREF
That makes sense, but perhaps state_alpha_test() in wined3d would be a more appropriate place.