polyhedra call for unalike adjacent polygons. For example, a pyramid has one square face and four triangular faces. This requires hybrid modules, or modules having different angles. A pyramid consists of eight modules, four modules as square-triangle, and four as triangle-triangle. Further polygonal faces are possible by altering the angle at each corner. The Neale modules can form any equilateral polyhedron including those having rhombic faces, like the rhombic dodecahedron. Mukhopadhyay module The Mukhopadhyay module can form any equilateral polyhedron. Each unit has a middle crease that forms an edge, and triangular wings that form adjacent stellated faces. For example, a cuboctahedral assembly has 24 units, since the cuboctahedron has 24 edges. Additionally, bipyramids are possible, by folding the central crease on each module outwards or convexly instead of inwards or concavely as for the icosahedron and other stellated polyhedra. The Mukhopadhyay module works best when glued together, especially for polyhedra having larger numbers of sides. Notes and references Bibliography External links 3dOrigamiArt.com Learn how to 3d Origami, tutorials and artist network. 3D origami video tutorials by Arthur Vershigora. Kusudama Pictures Photo Gallery and Folding Instructions For Many Polyhedra and Variations Image of Menger's Sponge in origami Modular origami page Origami Geosphere Paper model of a Geodesic Sphere. Mukhopadhyay's super simple isosceles triangle module James S. Plank's Penultimate Modular Origami Oxi Module by Michał Kosmulski Kusudama Me! Kusudamas of Lukasheva Ekaterina, also diagrams and tutorials Paper Structures by Krystyna and Wojtek Burczyk Kusudama by Mikhail Puzakov & Ludmila Puzakova: models, folding instruction, history, geometry Origami Origami