I tried to use media but cant get it to work properly. Still when my xscan
paramter = 4 the reflection is too bright, it should be much weaker than when
xscan = 3. Here is how i modified the absorber object. The only other change I
made was to the photons global setting where i added "media 100". Am i doing
something wrong?

object{

box
{
   <-extent,-extent,t_st> <extent,extent,t_st+t_abs>
   hollow
   pigment{rgbt 1}
   finish
   {
     reflection{0,1 fresnel}
     conserve_energy
   }

   interior{ior cmt_ior fade_distance cmt_abs fade_power 1000
       media{
        absorption <1,1,1>
        intervals 3
        samples 1,1         }

   }

   PhotonTarget(no, yes, yes, yes)
}
}

Alain <kua### [at] videotronca> wrote:

> > Thanks for looking in to this clipka,
> >
> > can you explain a little more about how i could use media as a workaround?
> >
> > also, is the bug regarding TIR easy to explain? I will be relying on TIR in my
> > scenes which will have different angles than those in the code I included in my
> > earlier message. If it might go wrong its useful to know before so I can keep an
> > eye out for problems
> >
> > stu
> >
> >
> >
> > clipka <ano### [at] anonymousorg> wrote:
> >
> >>
> >> Examining your problem, I did indeed find a bug in the handling of the
> >> interior fade feature (wrong interior being applied under certain
> >> circumstances), which I suspect to be relevant in your case. (I also
> >> found a flaw regarding total internal reflections, but so far I did not
> >> manage to come up with a situation where it would manifest as a bug, so
> >> that one can probably be ruled out.)
> >>
> >> The interior fade bug is also present in POV-Ray 3.6.2, so I don't think
> >> it will be fixed in POV-Ray 3.7.0 release proper.
> >>
> >> One possible workaround might be to use media instead.
> >
> >
> >
> >
> You add "hollow" to the object. This enable the object to contain a media.
> Next, in the interior block, you add
> media{absorbtion Colour}
>
> If you want to let the red pass but absorb the green and blue, you need
> {absorbtion <0,1,1>}
>
> If you also use fade_dolor Colour, use <1,1,1>-Colour for the media.
>
>
>
> Alain

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