[Sohcahtoa82]

Doesn't the physical size of your island also limit the scale? Sure, you can literally move mountains, but there's still a finite amount of material.

[iliketrains]

That is true, but I am not even sure you can cover it all with factory before you computer melts down (and the FPS goes to single-digits). We need to invest a lot more work to optimizations before making larger maps.

You can actually increase the ocean size in settings, making way more space if you decide to move mountains and make new space by landfilling oceans.