Hi - first an answer to this other question:

> I have another question. With the Moi export in .obj i never get the good
> rendering withe a radial texture like in the original manufacture product.
>
> The texture seems alway in bad orientation.

Probably the radial texture uses the UV coordinates that are set up on the mesh. Although MoI does export UV texture coordinates they're really basic and you need to create your own UV mapping instead. There is probably some kind of "UV unwrap" method built into Cinema4D that will do that for you. I do want to generate better UV coordinates directly from MoI in the future but it hasn't been a priority so far because poly modeling programs all have their own UV generation mechanisms already.

- Michael