Hi Stefan,
Thanks for your useful help that you gave me. The ball took me around half an hour and I learn a lot from it. Your idea is good but I prefer to use 3D Moi commands for this exercise and I've done it. I found a good video that make me eager to do it. The only I ask for a script because I believe that someone who programming Moi knows how to do this script and I hope to have more functions incorporate to the new 3D Moi v4 to improve the abilities of it. These commands are important to be there for the artist and designers and users like me.

Thanks anyway.

regards

Ray