The Cubatron

The Cubatron was the world's largest true 3D color graphics display from 2004-2006 (now overtaken by the Big Round Cubatron). It is 8x8x8 feet in size. It consists of 729 voxels (3D pixels) arranged in a 9x9x9 matrix, spaced 10 inches apart from each other. Each voxel is a 40mm diameter ball that can be independently set to display a 21-bit RGB color. The entire display can be updated about 30 times per second. The voxels "float" in space so that the viewer can see through the cube and have a view of most of the voxels from any position. Read More:

http://www.nw.com/nw/projects/cubatron/