1. Materials like a stone floor don't always need spec depending on the lighting. But I remember walking through a botanical garden and seeing the sunset reflected in all the pebbles, offset by their "normals" and no light reflected in the grout. It's the kind of thing that really made that moment memorable, but could only…
Eat3D, 3DMotive, polycount's wiki and the community are great resources. Art for Games has some ZBrush tutorials and will probably be expanding their library before long; it's a fairly new site.