https://bugs.winehq.org/show_bug.cgi?id=40801
--- Comment #10 from Hans Petter Jansson hpj@copyleft.no --- (In reply to Fabian Maurer from comment #9)
When is this software vertex blending used? Only when glsl=disabled?
It's been a while, but I think so. I don't remember why I was running the game in question (DAoC) with glsl=disabled, but I think it was necessary to get it to work.