For example images that use 2 color gradients with Bayer-Matrix dithering have usually much better compression ratios than images with random dithering. LZ77 from it's nature is good for compressing repeated patterns. size of the picture is not in the compressed stream so you have to know it ahead.compressed stream doesn't contain capital letters (A.Z).it's guaranteed that the compressed stream never contains ] character so it's safe to keep it in ] raw lua string.decompressor is 131 tokens long and is relatively fast.compression uses simple brute force search and can be very slow (up to a minute on fast PC), but who cares?.designed for PICO-8 pictures only (or any arrays of values in interval 0.15), don't try it on map or other binary data.Compression allows self-overlapping (for example offset 3 and length 20 is valid, it just copies itself with offset). I've used 3 different blocks: direct color output, offset + length block and just length for coherent rows (sequence that starts on the same X position but in previous row). LZ77 is very simple compression method that works similar to RLE with the exception: while RLE copies the same character N times LZ77 copies chunk of already decoded data of length N. Consider it as my addition to the community and use it wherever you need. Sometimes is better and sometimes is worse than other available algorithms here. PX-9 is very good choice but one of my passions always were compression algorithms.

As any of you guys I need some decent picture compression for the Pico Off Road game I'm making.

Image decompressor