In lots of little ways, as I'm working through the proxy set design, I'm getting ideas to feed back into the characters which will inhabit it.
Characters first, developed to represent authority, freedom, sympathy, religion, oppression, incarceration. All in terms of the protagonist's state of mind, trying to develop characters that would reflect elements of his story (history).
The environment has grown out of the characters and now that's echoing back to those characters.
It is still a psychiatric hospital but it's developing an almost church-like theme so... where does that go?