Cheat Code for Drawing: The NeoLucida Lets You Trace 3D Objects onto Paper

A camera lucida is an old-school device that uses a lens and a mirror to let you trace a 3D object in front of you onto a piece of paper below you. In 1999 artist David Hockney purchased one. After experimenting with it and a camera obscura as well, Hockney released his controversial book Secret Knowledge, where he laid out a case for how old masters--da Vinci, Caravaggio, Ingres, etc.--may have used optical devices to produce their realistic drawings. This became known as the...