Originally posted by Xilo The Odd:

terrain adjustment seems to be the only real culprit beyond adding structures as well as discovering more and more of your map.

the only real way to test this would be to fully reveal your map with you having done nothing else to adjust the world.

then, use some kind of command to delete ALL constructions the player could build. compare file size numbers.

What about chopping down trees? I would think that counts as terrain adjustment, I've been in habit of leveling entire sections of black forest for my wood addiction.

Maybe I should plant and replant trees on a tree farm base instead.