Actually, is Elfish fortress above ground or underground? It seems affected by daylight changes, so it's no longer undergound?
P.S. It's really hard to find the exit back to the world :)
The fortress has been lifted to the surface with release 2.2.0 :)
You can use a crystall orb to find the portal back.
But maybe it would be a good idea to add a few guide posts to its streets as well ?
Oh, I don't have an orb yet :) The posters would be great (and funny kinda "fire exit <----"), but not necessary. Only if it's very easy :)
Hm, it might be the same as shop signs are made, no need in graphic image. Just with text kinda "Fire exit to the north-east".