[falsedan]

You'd use something like Perlin noise to seed whatever makes the decision about which tile to pick. Perlin noise is deterministic, so it's perfect to generate from the (x,y,z) of the tile & you can be certain that the location will resolve to the same tile if you recalculated the area from scratch. Divide up your world into areas, and force the centre of the area you're in and adjacent areas before filling out the area the player is in.

[marian42]

If you have two adjacent chunks, collapsing one will impose constraints on the other one. Even if the RNG part is deterministic, as you suggested, the result will be different depending on which chunk you collapse first.

[falsedan]

I don’t get it. If you have some location between two regions, and you fill it in starting from some regular point (say, centre of the south-west region), you will get the same tiling every time.

If you randomly choose a point to start at (like the player avatar’s current position), then I see that you might get different tilings when regenerating the location.

[ajuc]

If you divide world into chunks and specify order of collapsing inside each chunk, and use deterministic random number generator seeded with the same thing for given chunk - then the result will be the same each time.