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    If you jump to 11:52, you’ll see a neat demo that shows off the engine’s performance: 70,000 spheres (ray traced on the card), 500 lights, at 60 frames per second. Great stuff!

    http://www.youtube.com/watch?v=t3xdv4UP9-U&t=11m52s

    The source code is available on GitHub:

    https://github.com/ntoronto/pict3d