http://bugs.winehq.org/show_bug.cgi?id=21515
--- Comment #122 from Jeff Zaroyko jeffz@jeffz.name 2010-03-09 03:59:56 --- (In reply to comment #121)
According to http://www.gamasutra.com/features/20051228/sherrod_01.shtml, DXT1 is a texture compression format that is supposed to be available in OpenGL, so perhaps that's just not implemented in Wine yet. I did say earlier that I thought those missing figures could be due to textures not being loaded and this looks like a possible reason.
Have you read the following? http://dri.freedesktop.org/wiki/S3TC