Where walls meet

Brief

This is probably an exploration of the humble corner, but maybe there are other ways in which walls meet? Do they meet cleanly and amicably, and are just built to be together, or is something a little more jarring going on? And what happens on the insides and outsides of corners? If we were naughty we might have been put in one, but it’s less obvious what to do with the outside of a corner, except maybe peer around it and look what’s round the other side.