So I haven't put lights on the upper portion of the walls yet, but it is still in consideration. I've also decided that since the lighting in the hangar never changes, I'm drawing the tromp l'oeil panels directly into the diffuse map. I'm thinking of doing away with the hangar-normal map entirely. There's also a little desk on the far wall. It even has little chairs.
Today was a day of discovery. Did you know that, in Photoshop, if you draw a point with the brush, then shift+click somewhere else, it makes a straight line?
I've also found a way to get rid of the aliasing on my textures, with out re-sizing and Gaussian blurs and whatever. Just rotate it a few degrees, then back again. Gets rid of the jaggies like a dream. Seems obvious now that I know it...