Use independent RNGs for different world gen purposes

[sparr]

It seems like Factorio uses a single RNG for everything. This means that things like map seeds are only really useful with exactly the same mods and game settings and map settings.

It would be possible to create a bunch of independent RNGs and use each one for a different purpose. One for terrain, one for resources (or even for each resource), one for biter spawns, one for in-gameplay randomization like damage, etc. This would make game seeds a lot more portable and useful.

[ssilk]

Keywords: RNG = Random number generator.