This invention relates generally to three dimensional volumetric display. Optical data is supplied by an optical data generator through an optical interfacing unit to a rotating display which produces three dimensional volumetric images. The optical interfacing unit transforms non-rotati
The invention is a method for making a metal containing article, comprising the steps of: providing a layer of a porous ground in a selected area; exposing selected regions of the layer of porous ground to light, thereby metallizing the selected regions; repeating the foregoing steps a s
