Hi Anthony,

> It would be great for me and for other
> users to see precisely the workflow
> you've used to build the "boiteaproblem" :D

No problem, as soon as I have a chance I'll post a few steps.

> Pilou's right, what about the glitch ?
> Is that okey for rendering with
> Mental Ray back into 3dsmax for instance ?

Looks like Pilou has answered that already, I was actually quite pleased that MoI got that result, otherwise I had to resort to low level modeling where you seperate the surfaces and start trimming and joining, which involves a pretty high degree of accuacy and time to get things to join up again, anyway, that area will be covered by the knurled ring as well so for rendering I don't think it will be an issue.

Cheers