Oh man did I goof!
No, no, no. Not this:

 density { spherical
  density_map {
     [0 White] //inner (a regular old fashioned texture goes this way)
     [1 Clear] //outer
    }
  }

But this instead is correct:

 density { spherical
  density_map {
     [0 Clear] //outer, zero meaning least dense only when media
     [1 Inner] //inner, one is most dense
    }
  }

Also, using previously defined density {} statements:

  density {
    spherical
    density { MyFirstDensity }
    density { MySecondDensity }
  }

Think I confused your reversed material texture_map when writing my
previous reply, so sorry.

Bob Hughes wrote:
> 
> As Nieminen said, you're dealing with a surface-only object (any
> primitive(s) are simply the surfaces, no interior until CSG'd (and even
> then still the various surfaces exist only). You have also got the
> textures listed backward; 0 is innermost, 1 is outermost in this case
> (repeats over if sphere is more than 1 unit diameter). You can easily
> reverse these things with 'frequency -1' after 'spherical'.
> Besides that, I'm not sure why you would be getting a black sphere when
> your texture says it should be opaque white at the surface. Oh well,
> anyhow, using media to get the right effect you want (I'll assume) you
> need to reverse the inner and outer textures used in your example so
> that 1 is innermost, 0 is outermost. Like so:
> 
>  density_map {
>     [0 White] //inner
>     [1 Clear] //outer
>    }
> 
> within a density statement, within a media statement, within further
> still a interior statement.
> Wish you luck, it's not as hard as it may sound. Except for it being
> rather slow and prone to granularity.
> 
> "Inexistencia-Design, Dec. P. Eventos Lda" wrote:
> >

> > the outside), but I can only do in a disc object with the following code
> >
> > disc{ <0,0,0>, <0,1,0>, 1.0
> >       material{
> >       texture {
> >                     spherical
> >                    texture_map {
> >                                          [0.0  pigment{rgbft <1, 1, 1, 1 ,
> > 0>} finish{ambient 0 diffuse 0}]
> >                                          [0.4  pigment{rgbft <1, 1, 1, 0.4 ,
> > 0>} finish{ambient 0.5 diffuse 0.7}]
> >                                          [1.0  pigment{rgbft <1, 1, 1, 0 ,
> > 0>} finish{ambient 0.5 diffuse 0.7}]
> >                                         }
> >                  }
> >                  }
> >        scale <60,60,90>
> >       translate 100*z
> >      }
> >
> > When applying to a sphere the render goes black.

> > Any ideas?
> >
> > Sergio Faria
> 
> --
>  omniVERSE: beyond the universe
>   http://members.aol.com/inversez/POVring.htm
>  mailto:inv### [at] aolcom?PoV

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/POVring.htm
 mailto:inv### [at] aolcom?PoV

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