I'm not talking about using noise maps to generate maps/levels. I'm interested in knowing how tilemaps work and if it's possible to control/replace individual tiles on a map/level with other specific ones when a world generates.
I'm a noob and trying to gain a better understanding how of to use tilemaps in a way that doesn't involve just manually placing tiles by hand.
EDIT: Actually, knowing how to combine timemaps with noisemaps wouldn't be so bat, either, despite my original comment.