 This allowed them to create with increasing levels of complexity, and the art of origami reached unprecedented levels of realism.Now most higher-level models are accompanied by crease patterns.Although not intended as a substitute for diagrams, folding from crease patterns is starting to gain in popularity, partly because of the challenge of being able to 'crack' the pattern, and also partly because the crease pattern is often the only resource available to fold a given model, should the designer choose not to produce diagrams.