Casting the details

I've been furiously casting the detailed little city that lives at the heart of Zark
Using a variety of small parts, I carefully sculpt the negative of what I want in clay. Since I am sculpting upside down and inside out it is very improvisational.
Here is a picture of half of the underground city with my hands for scale.

Useful suggestions

Spent all day calling around looking for materials both here in Philadelphia and also in Boise, Idaho where I will do the final cutting and off site building. Kris suggested that maybe we could use glue and a nail gun to quickly get the panels together; the nails holding long enough for the glue to bond. If it could work it would make it so much stronger and faster to assemble. Excited to go do tests.