This is an 15 inch 4x100 VW Fire & Ice Alloy from VW Golf Mk2, Corrado
It's been modeled out of a flat picture so it's not Dimentional accurate, although it should have close enough proportionsThis one is intended solely for rendering purposes as it does not thave the back side of the alloy, although it should be easy enough to adopt for printing purposes.
it's Diamond-cut surface is using free RenderMan spiral texture for bump generation.