Lightplot is a robotic 3D light painting system. Animation is exported from 3DS Max, and imported into the Lightplot software which then drives a robotic arm to draw the models in the air. The software also controls a DSLR camera to take long exposure photographs of each frame of animation.
The project grew from early experiments with Lego NXT and robotics. It currently comprises a custom built robotic arm controlled via Phidgets boards, which are driven by a stand alone Windows application written in C# and Microsoft .net. The exporting software is written in Maxscript within Autodesk 3DS Max.
[via The NXT Step]