Rhino v-ray materials

[greedy123]

Does anyone know where I can get more free .vismat materials for v-ray in rhino?

Alternatively:

The only materials I can find are in .mat format for 3dsmax. I do have access to 3dsmax but was wondering if there is a converter or an easy way to make one into the other.

Thanks

Also, i can't get on the asgvis site... anyone having similar trouble?