http://bugs.winehq.org/show_bug.cgi?id=31806
--- Comment #13 from Henri Verbeet hverbeet@gmail.com 2012-09-28 12:58:56 CDT --- (In reply to comment #12)
Why does this type of texture compression need to be enabled "manually"?
force_s3tc_enable is technically a hack that gets you partial S3TC support, but nevertheless that's enough for a lot of applications. Full S3TC support requires libtxc_dxtn to be installed.