Prisms. A prism is a 3D shape which has a constant cross section - both ends of the solid are the same shape and anywhere you cut parallel to these ends will give you the same shape.. For example ...

But 3D shapes with curves can fill space, ... Zebra stripes, river estuaries, cross sections of onions, seashells, heads of wheat, red blood cells, plants and fungi all resembled 2D soft cells.

In a cross-section of a chambered shell, the segmented shapes appear to have corners, but the 3D geometry of the chambers does not have any. Krisztina Regõs and Lajos Czegledi. The team ...

3D printers build objects by cross-section, one layer at a time from the ground up—gravity is the limiting factor. But what if it wasn’t? Using proprietary 3D printing materials, Petr Novikov and Saša ...

Using a photolithography process, scientists have created flat polymer sheets that bend themselves into three-dimensional shapes when exposed to water.

This Stanford team is working on a way to display 3D information, like in a CAD or modeling program, ... allowing more complex shapes, like moving cross-sections, to be expressed as well.

In a 2D the answer is two, and a 3D space can be tiled in shapes that have no corners at all, called soft cells. These shapes can be made in a few different ways, and some are shown here.

Scientists from The Hebrew University of Jerusalem have created wood ink that can be extruded into flat wooden structures, self-morphing into complex 3D shapes as they dry and shrink.