A raytrace map will do.
What render engine are you using?
If it's mental ray, there are many options and preset materials that are reflective.
Alias/Wavefront Maya 3 -> Discreet 3DS Max 4 -> ...
Win7 Pro 64
EVGA Classified Super Record 2
Dual Xeon Hexa-Core, 48GB RAM
GTX 780 x 2
Corona Renderer, mental Ray