How do the obstructions in a cave (stalagmites, etc) react with buildings, in regards to the 2-sides clear rule?
Can I build on all sides of an obstruction, or does that also need 2 sides clear?
Do the obstructions count as a building for facilities next to it? So if I have a 3x3 with 1 wall next to the obstruction, does it count as having 3 sides clear or 4 sides clear?