В шапку, если кто-то ещё пережимает текстуры.
Advanced DXTn texture compression library for game developers.
crunch is an open source
lossy texture compression library and command line compression tool for developers that distribute and use content in the DXT1/5/N or 3DC/BC5 compressed mipmapped texture formats. It consists of a command line tool named "crunch", a compression library named "crnlib", and a single-header file.
It can also create standard .DDS texture files that are much more compressible by a lossless compresor such as LZMA (or Deflate, LZO, etc.), by trading off quality by reducing the # of unique endpoints/selectors output to the resulting .DDS file. (Basically, it's able to trade off rate vs. distortion when compressing to DXTn.)
http://code.google.com/p/crunch/