Hi José, here are a couple of results that eric has previously posted here on the forum:

http://moi3d.com/forum/index.php?webtag=MOI&msg=6384.1

http://moi3d.com/forum/index.php?webtag=MOI&msg=4662.1

http://moi3d.com/forum/index.php?webtag=MOI&msg=2251.1

Hope you don't mind me posting them eric!

- Michael