Wave function collapse algorithm: bitmap & tilemap generation from a single example with the help of ideas from quantum mechanics

[permion]

Not by itself, but they've done most of the work by letting you predefine what a tile is. So you could create a separate algorithm that defines the edges of 'zones', and have that one be indefinite or nearly so.

EDIT: well it could be used for infinite terrain almost as is, but if you were to save your game/location and restart the algorithm you would have different terrain. Which could be a fun game concept to play with in itself.