materials not visible in imported dwg files

[fiddleman]

hi, I exported a rhino file to dwg with all its levels (I premise that I did not apply materials).
I imported it in 3ds with levels, and viewports is all right.
When I go to apply the material in the meantime I do not see it in the viewport even if I give it the command "show shaded material in viewport", and then if I try to render (mental ray) it does not see the object in dwg.
not even "put material to scenes" is active.
How do I proceed?
Thank you.

 

[lattu]

make it in rhino that is not bad at all

 

[prismacad]

... if you can attach the dwg we can try to understand the problem.