We would like to share our project we recently did here at Polycat visual effects. We strung 25 000 leds into 5x5mx2.5m space. All LEDS are individually controllable.
So you had a 3D cube in houdini then anything you did to this cube shows up on the display unit, wether it be a vops operation or attribute transferring colors and objects through it. realtime!
Or just look at the video!