"Mienai" <Mienai> wrote:
> "Lonnie" <lon### [at] yahoocom> wrote:
> > I don't seem to be able to render photon caustics in a media container at
> > all.  With both turned on the caustics diappear, the media disappears in
> > the shadow of my transparent object, and shadows go completely black.  With
> > only media turned on media works just fine with proper shading in the
> > shadows.  With only photons turned on the caustics work fine.  I all cases
> > in internal diffusion works.  I have spent hours with the documentation to
> > no avail.  What am I missing? Here are the settings I last tried:
> >
> > global_settings {
> >   assumed_gamma 1.0
> >   max_trace_level 15
> >    photons {
> >      count 20000
> >      jitter .4
> >      media 300
> >      max_trace_level 35
> >    }
> > }
> >
> > In my object's interior:
> >
> >   interior{
> >     ior 2.2
> >     dispersion 1.9
> >     dispersion_samples 120
> >   }
> >
> > My objects' photon block:
> >
> >   photons{
> >     target
> >     reflection on
> >     refraction on
> >   }
> >
> > My media container:
> >
> > cylinder{
> >   <0,-.01,0>,<0,14,0>,8
> >   texture{
> >     pigment{ color rgbt <1,1,1,1>}
> >   }
> >   interior{
> >     media{
> >       scattering { 1, rgb 0.03}
> >       intervals 1
> >       samples 30,100
> >       method 3
> >     }
> >   }
> >   hollow
> > }
>
> I think you need a photons {pass_through} on your media container.

Thanks Mienai, that fixed everything.

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