[rober]

another problem for me:
...how to control the meshes when in the render appear a line like this...
Rober

[JDHill]

'how to control the meshes'

Well, it looks from here like your ring is already a mesh, so really, there is nothing to control. It's too difficult to tell from a screenshot whether or not there are weird normals, or bad texture coordinates, etc. --
it is just too hard to say...so again, if you send me the model, I'll take a look.

[JDHill]

I don't see anything wrong here - it renders fine. There is an Anisotropy map in the OroBlanco material (ANISOTROPIC.jpg) that I am missing though - try removing it to see if it is the cause.

[rober]

sorry but only now I have had the time to try your solution ...and the answer is:
Ok!!!
Thankyou Jdhill
Rober