Putting this up because I just found it.

http://www.pleatfarm.com/2010/05/05/origami-hunter-due-amigos/

If it wasn't late, I'd take a closer look and try to figure out the folds, but it'll have to wait.

Also, any ideas for materials that would be suitable, both with regard to being used as a lightshade and in terms of rigidity, etc.

And any other models which might work.