i was expecting this to come from a japanese artist not an austrian one, but ill take 2. torggler calls this his flip panel door, or “dryehplattentür”, also referred to as the evolution door. its made of paper stretched to structural beams. he has a few variations on this door, one with the origami-esque triangles that fold out to help the door move, and another system with rods that rotate two square panels. the door is currently a prototype but will come in glass wood and steel versions. by ht