Voxel based global illumination video

Last week at I3D, a very interesting paper about voxel-based global illumination was presented, which was already available for some time at Kesen Huang's I3D page. But now there is also a video of the technique in action!

Paper and video: http://www.rendering.ovgu.de/publikationen.html

The paper also contains some results of voxel-based path tracing, which are unfortunately not shown in the video.

The voxel grid allows a coarse scene representation, which is much cheaper for calculating real-time GI. Pixar, PDI Dreamworks and VoxLOD use a similar technique (see http://raytracey.blogspot.com/2010/08/faster-raytraced-global-illumination-by.html)