Just framing pine with a ring top and bottom to keep it round and probably alsynite around the outside on a concrete floor. If it stays fine I should get the floor done this week-end, well most of it. I had to do the dome first to get an accurate diameter for the rings. It only needs to be 1.2meters tall and I might add a pod sticking into the garden bed. I swapped a TV for an eeep box yesterday so that makes the control PC nice and small
The pc is that box screwed to the back of the monitor.