http://bugs.winehq.org/show_bug.cgi?id=32576
--- Comment #9 from Henri Verbeet hverbeet@gmail.com 2013-05-13 15:11:52 CDT --- (In reply to comment #8)
fixme:d3d_surface:surface_allocate_surface No GL internal format for format
WINED3DFMT_DXT3.
Reminds me of this comment about s3tc support: http://bugs.winehq.org/show_bug.cgi?id=32291#c5
Yeah, that's probably s3tc / libtxc_dxtn. That's not in a lot of distro packages either, for similar reasons, but some distros now package https://github.com/divVerent/s2tc as alternative.