![University of Michigan Virtual Reality Laboratory Vrlogo10](https://i.servimg.com/u/f80/09/00/29/31/vrlogo10.jpg)
I wanted since weeks to show to Omind what I found by hazard
( but may be he knows )
![University of Michigan Virtual Reality Laboratory Boink10](https://i.servimg.com/u/f80/09/00/29/31/boink10.jpg)
http://www-vrl.umich.edu/intro/boink-penrose.wrl
and now I see that they have all that !
http://www-vrl.engin.umich.edu/VRML/
so
http://www-vrl.umich.edu/projects.html