The figures below have been made by my friend Xerome by folding carefully chosen tree leaves. I consider him an expert in origami, able not only to fold the most intricate models but also to create new ones of his own. With these new creations he has gone a step farther in his art, not only being able to fold the leaves as if they were normal paper but also to bring hidden shapes out of them in a series of impressive masks. As far as he and I know nobody has ever done this before, but beyond the novelty of the technique I believe that these figures show an artistry that very few people can achieve.
Update 26.02.06 I added a picture of Xerome taken at the Origami meeting which took place this weekend in Santiago.