So, I finally put together an array of boards with a wood texture for the wall, added a hook to hang the lantern from, a simple textured ground plane, changed the light to a pair of area lights, and changed the camera to a shallow depth of field. I’m just noticing that the flame isn’t there, though. I wonder if it is because I added fog? Checking now…
Nope, still not there. I worked too much for it to just disappear. Hopefully I can figure this out.

I still have to modify the light to have a more realistic falloff, and maybe tweak the ambient lighting downward, close to zero probably. At least it’s looking close to done.
Update: turns out that it was one or both of the planes I had added; they were not specified as hollow, and the media was apparently inside one or both of them, so it wouldn’t show up.