Folding without stretching
Folding is an effective method for making three-dimensional form because it turns flat material into the third dimension. Apart from its formal qualities you can gain structural stiffness into otherwise planar materials by introducing folds into material to increase the selfsupporting effective span and rigidity of your design. Creased surfaces, folded plates and wrapped volumes are methods of folding.
Origami is a traditional Japanese art of paper folding and a good example of folding without stretching. The goal is to transform a flat sheet of paper into a finished sculpture (design). This method is really interesting for design and architecture because you get automatically developable surfaces for digital production once you unwrap the geometry.