how much work would it take?

[Marti]

The only map I can think of that might be possible with the current engine limitations is forgotten, and even then you'd have to cut out the bottom tunnel which would make the map rather boring.

eh

shine also has a tunnel thingy, and so does mines, and so does aqueous, and so do other mapz


if the height difference isnt too much it is possible, quite a few maps have quite a big height difference, big enough for a tunnel, e.g arid.