Save chunk states

[Eldemarkki]

Save the densities of all the chunks, so they can later be reloaded and thus save whole worlds

[ghost]

Might be useful for compressing stored chunk info:
https://github.com/Genbox/CSharpFastPFOR

(only suitable if density values are ints)

[Eldemarkki]

The density values are bytes so unfortunately, that wouldn't work. Something that would work though, is run-length encoding. RLE may also be able to compress the chunks a lot because there usually are long runs of densities 1 and 0 (because big parts of the chunks are either completely solid or completely air).