I have another piece of wall going in later that will cover up the studs and wiring. And of course, I will finish the wall surface off nicely so that it looks really cool, rather than that ugly OSB.
You can also see the horizontal boards running along the inside of the tube, like ribs. I will be attaching flexible wood paneling to this ribwork, so that the round walls have a wooden look, rather than corregated metal. Herein lies another reason for the interior partition wall: it also serves as a key support to the rib structure. (And the rib struture in turns gives more support to the partion wall.)
Here is a closer look, showing the ribwork and also the beginnings of a built-in bench. The bench was an immediate hit, not only for the kids, but for myself and other adults wanting to check out the place. It is sooo nice to have a place to sit down in there, especially for those of us with stature more resembling a wizard than a hobbit.
Of course, this will all be finished off nicely with wood to cover up the studs, wiring, corregated metal, etc. Also, I will be working on the doorway, so that it looks nicer, and so the studs are not exposed. I have a nice floor covering planned as well.