Well that was easy..
Actually it wasn't.
This curved straw bale wall was the most demanding bit of straw work I have ever done. I treated it as somewhat of a thesis. After the elaborately curved concrete footings, straw is stacked on edge usually well over 2 metres high and rather straight. The difficulty is maintaining a rigidity in straw without the advantage of attaching to a structure at the top (usually the ceiling or roof structure). It also lacks a rendering stop at the top either. It is internally braced with curved and re-welded reo mesh and vertically braced too. Gal netting, plastic membrane over the top and three coats of lime render.