Jason Falconer : "Researchers at Disney Research Pittsburgh and Carnegie Mellon University are experimenting with 3D printed optics using clear resin.
Printed optics can create a variety of effects within 3D-printed objects, from focusing light within printed prisms to channeling light through honeycomb-like "light pipes," which give the effect of individually lit pixels[…].
One of the more interesting concepts involves a game of chess played on a tabletop display. As you move a chess piece across the board, its location is automatically sensed and displayed on the screen, which is then piped through its pedestal. The same technology could be used to display other contextual information, like suggested moves […].
The researchers are also experimenting with embedded electronic components that are inserted into an object mid-print. By doing so, they can create components like buttons, dials, sliders, and LED bulbs that focus light, as well as accelerometers and touch sensors…
Disney Research/Printed Optics : http://www.disneyresearch.com/research/projects/hci_printedoptics_drp.htm