Nice! :)

but... (always a but...)

The white part would look better with a little bit of subsurface scattering.
I tried this, and it looked good imho: add a transmit value of .5 to your
pigment, and add this interior:

 interior {
  media {
   #declare Kleur=<.5,.75,.9>;
   #declare opacity=1.5;
   #declare Diffuse=1*opacity;
   scattering {1, rgb Kleur*10*Diffuse extinction opacity/Diffuse }
   samples 1,10
   method 2
  }
 }

Will be slower of course, but also more realistic :)
Oh, and make sure your model has the same shape as the real object..  Not only
on the outside but also the inside!

cu!
--
camera{location-z*3}#macro G(b,e)b+(e-b)*(C/50)#end#macro L(b,e,k,l)#local C=0
;#while(C<50)sphere{G(b,e),.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1
;#end#end L(y-x,y,x,x+y)L(y,-x-y,x+y,y)L(-x-y,-y,y,y+z)L(-y,y,y+z,x+y)L(0,x+y,
<.5,1,.5>,x)L(0,x-y,<.5,1,.5>,x)               // ZK http://www.povplace.be.tf

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