"SharkD" <nomail@nomail> wrote in message 
news:web.46734008e9b9c8227180a6bf0@news.povray.org...
>I did a little searching and found that the solution would be to use a
> variable ior and some sort of a wave pattern. But, this is not possible in
> POV-Ray. I will instead try nesting objects with differenet ior inside 
> each
> other and see if that gives good results.

Hi Shark,

You may want to try a noisy isosurface. Isosurfaces give you lots of control 
over the sorts of perturbations you can simulate.
I hacked the following example together based on Mike Williams' isosurface 
tutorial at  http://www.econym.demon.co.uk/isotut/combine.htm

Regards,
Chris B.


camera {location <0, 0.8,-1> look_at  <0,0,0>}
light_source { <0, 50, -30> color rgb <1,1,1>}
global_settings { max_trace_level 10 }

plane {y,0 pigment {checker scale 0.1}}

#include "functions.inc"

#declare  S = function {x*x + z*z + y - 1}

isosurface {
  function { S(x,y,z) + f_noise3d(x*10, y*10, z*10)*0.3 }
  max_gradient 7
  contained_by{sphere{0,2}}
  pigment {rgbt 1 } interior { ior 1.03 }
  scale <0.1,1,0.2>
  rotate z*90
  translate 0.2*y
}

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