Rick Measham <rickm*at%isite.net.au> wrote:
> Rick Measham wrote:
> > The image following has photons set with this:
>
> Strange .. there's no image .. posting again ...

How about a layered, Pearlescent type of texture for the pearl?
Alter the pigments and play with the specular and transmit values on the for
nice effects.
Results in nice pearlescent paint as well.


  #declare Rmin=.1;
  #declare Rmax=.33;
  #declare T_inner=White; #declare T_outer=Black;
   //#declare T_inner=White; #declare T_outer=Black;
   //#declare T_inner=Black; #declare T_outer=White;
   //#declare T_inner=Blue*0.3; #declare T_outer=Red*0.0+Green*0.9+Blue*0.9;
   //#declare c1=Red*0.5; #declare c2=Red*0.9+Green*0.9+Blue*0.0;

  #declare T_Layers=
  texture{
    pigment{rgb T_inner}
    finish{specular 2 metallic roughness .1 brilliance 10}
  }
  texture{
    pigment{rgb T_outer transmit .33}
    finish{
    specular 1 roughness .0125 diffuse 1-rmax reflection{Rmin,Rmax}
conserve_energy
    }
  }

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