Hi, sorry for my bad english

This is my project for now : https://www.dropbox.com/s/baehh8g1mv3vtud/protorollnfall.swf

My problems are :

I set the number of subdivision on my box to 10 to decrease the “bug”. But when the ball roll to antoher triangle on the top face of my box, you can see a superposition between the ball and a subdivision of the box. I do not know if you understand but I add a screenshot :

http://www.imabox.fr/u20/1203111905xET1VC29.png

And there is an other problem : sometimes my ball cross the box, but I think it is linked to my other problem…

This is for a school project and I need an aswer absolutely.

Thank

Ok, I resolved the Z-sorting problem, but now, I still have a bug with collisions :
http://www.imabox.fr/u20/1204111529Cf2ptJ24.jpg

The box “recalculate” vetices, and my ball sink in my box… And cross it. I move the box with my mouse.

Any answer please?