http://bugs.winehq.org/show_bug.cgi?id=9665
--- Comment #21 from Martin Sand deadlock@start.no 2007-10-29 12:05:49 --- I was playing around with useful registry keys, and noticed something. In the wiki, it says that the default backend for DDraw is gdi, but this is not correct. I set the registry key HKEY_CURRENT_USER\Software\Wine\Direct3d\DirectDrawRenderer to "gdi" and the game starts and runs with this problem(at least the demo does, I haven't had time to try the full version), but if I set the key to "opengl" it crashes. In the wiki it says: opengl - Use OpenGL (fast but not all programs work correctly)]
Apparently mask of eternity is one of the programs that doesn't work correctly with OpenGL. The game doesn't run slow with gdi.