Spheres - Choose your pattern
spheres: Spheres are 3D shapes that are not ruled surfaces and are not developable. They are typically formed through cold deformation in the Z-direction (that is, in a direction which is perpendicular to the sheet metal surface). It is considered, that metal sheet is not thinned or stretched during this process, and the bending radius is smooth, uniform, and several times the thickness of the sheet metal (R > 5 * T).