Is this possible? I have a beautiful antique lupe (Holmesian magnifying
glass) modelled, but the intricate texture of the handle is lost when there
is no direct illumination, as it uses a surface normal... radiosity is very
heavily used in this particular scene, so I was thinking... would it be
possible to do something like this:

    #declare fn_lathe = [some sort of lathe object def]
    #declare fn_pigment = [the pigment derived function]

And then do a run-of-the-mill isosurface using a pigment based function
subtracted from the base function, as I've done before per the POV docs.
Is this even feasible? TIA.

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