https://bugs.winehq.org/show_bug.cgi?id=36564
--- Comment #9 from fjfrackiewicz@gmail.com --- Created attachment 55232 --> https://bugs.winehq.org/attachment.cgi?id=55232 Subterrain with GLSL disabled
This screenshot shows the smoky effect behind the player's character (the red arrows are by me). That smoky effect becomes solid black with GLSL enabled.