I folded a crane as an experiment from Herlitz book wrapping foil, and to my surprise, it proved to be a rather nice folding material. I also folded a Fujimoto Hydrangea, and the fold also went quite well. This foil is relatively thick (it’s supposed to protect your books, after all) and - the most surprising part - it was easy to make a grid and to reverse creases as needed. Memory isn’t the best, but I’ve seen similar in some kinds of paper as well. The fact that you can make a multi-level Hydrangea out of this foil, shows that it’s a kind of “paper” to be taken seriously.
The final effect is unique since the foil is almost completely transparent and at the same time quite reflective. It looks great, but it was difficult to take good pictures of. One way is to take a picture of the model’s shadow. I think this effect would look great with a large tessellation. This foil may also be nice for some modulars, but since the surface is very smooth, it may not be a good choice for those modular design whose stability depends on friction between unit surfaces. Anyway, this seemed like a crazy idea at first but in the end I was really impressed and certainly want to explore this folding material in more detail when time allows.