If not MentalRay you should think about raytracing your scene to get the full effect of the shader. Another thing to remember is that lighting makes or breaks a scene.
Darkon
Red bellows of flame have blackened my stones
Convulsing my frame and cracking my bones
Hell's dragons of steel who roar in their chains
Crawl into my caves to suck out my veins.....
-The Mountain P.F.M.