Talk:Home/@comment-206.45.64.252-20110525213016

In addition to my comment below: You can actually have holes in the background and NPCs will still live in that room. However the holes must not exceed a certain size, otherwise NPCs won't live in them and instead monsters will spawn.

Here's a screenshot to demonstrate that: http://img34.imageshack.us/img34/9241/terrariaf.jpg