Here is the first test for the Soft Egg Dome trade show booth. The question was "will PVC bend without breaking to form the frame, and it seems like the answer is "YES!" Clearly, some sort of 8 way joint will be needed at the top of the frame.
It is a bit bigger than the 10x10 allowed. Internal bracing is required. I'm intending a stretchy cloth cover that will hopefully keep it all under tension and stable.
I need to see if it can support banners and lights.

I left it out for a couple of days to see if it was stable...

Does seem, to lean a bit... hmmm.

And then it crashed.

But did I quit?

No! I started again, adding two rows of bracing on the bottom, and using rope to maintain tension on the doorway during construction.

A learning process, to be sure!