Possible values are "glsl" (default) for GLSL, "arb" for ARB vertex/fragment programs and "none" to disable shader support. New HKEY_CURRENT_USERSoftwareWineDirect3D registry keys:
This typically allows applications to reduce CPU usage while minimized, and is in some cases required to allow the application window to be restored again.
This makes the prefix look more like a real Windows installation, at the cost of some extra disk space.