Another volumetric display! This one does away with the wildly spinning arrays of LEDs ( ), instead using projection mapping onto a point cloud etched inside a block of glass. 00:00 Establishing the principle 01:04 Generating a point cloud 01:58 Unboxing the crystal 02:28 Stacking the positioning system 03:34 Assembling the cradle 04:27 Calibration & alignment 05:57 Showreel! 07:21 Doom, obviously 07:43 Fin It has a resolution of around 38000 points - not anyone's idea of HD, but enough for playable games (if you're generous with your definitions of 'playable' and 'games'). The showreel demos all come from Multivox ( ), the codebase that handles my spinning displays. There's a new device driver for the new setup, but the demo code is unchanged. The stack of optomechanical stages was rescued from a local lab clearout some years ago. The next step for this project would be to get rid of that, build a solid mount in a nice housing, and perform the alignment in software ( ). I'm not the first person to do this - a group at Columbia University built one in 2006