montain Roofs, no roofs.

[woolfoma]

one only needs to look at dwarf fortress to see that multiple layers wouldn't use up too much ram, its just too hard to do with rimworld at the stage it is at (though is might not be possible at all to change it later    ) if you want multiple layers, mod it in to prove its possible or something.

[milon]

one only needs to look at dwarf fortress to see that multiple layers wouldn't use up too much ram, its just too hard to do with rimworld at the stage it is at (though is might not be possible at all to change it later    ) if you want multiple layers, mod it in to prove its possible or something.

Dwarf Fortress also only "renders" an ASCII display.  Which is easy.  The Unity engine RimWorld uses is a tad more complex and demanding.  And modding in multiple layers would require a total conversion mod (to make EVERYTHING work with it), not just a couple tweaks here and there.