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S2tc
Jul 20, 2023
Subset of a well-known texture compression scheme
S2TC’s format specification is very easy to implement, so it is not hard to make a working compressor or decompressor for it. It is based on Color Cell Compression[1] from 1986, and decoding is done entirely using the methods from there. Encoding is done using a search and refinement method that is derived from the methods described in that paper.
This also makes this format a great platform for learning about texture compression and how to tune a compressor for best quality.
S2TC is especially well suited for runtime on-load compression of textures, as it is - in low quality settings - way faster than any other texture compressors out there.
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