http://bugs.winehq.org/show_bug.cgi?id=19128
--- Comment #2 from Jörg Höhle hoehle@users.sourceforge.net 2009-09-15 03:57:21 --- When use_nv_clip returns FALSE in wine-1.1.29 then WC 2006 works equally well with or without UseGLSL. I observed no difference.
The number of GL errors in the console increases from 2 to 4 with UseGLSL=disabled. I thought I had copy&pasted them into my notes but I'm sorry I can't find them right now.