I can confirm this on my home machine as well.

Ver.: v3.5 beta 4
O/S: Win98
Computer: Celeron 466MHz, 128M

I will post the two pictures in p.b-t.b.  No changes were made between the
two renderings, except I ran cornell.pov included with the install (actually
I didn't complete the render, maybe that's where it comes from) .

-tgq

"Bob H." <omn### [at] msncom> wrote in message
news:3bb17492@news.povray.org...
> "Nathan Kopp" <nat### [at] koppcom> wrote in message
> news:3bb157c7$1@news.povray.org...
> > I have been unable to duplicate this problem.
> > Win2k, AMD Athlon, 256MB
> >
> > Can anyone else duplicate it?
>
> Can't.  Renders as should.  WinME, PIII 800MHz, 512MB.
>
> Bob H.
>
> > "Trevor Quayle" <Tin### [at] hotmailcom> wrote...
> > > Ver.: v3.5 beta 1
> > > O/S: Win2000
> > > Computer: P4 1.4GHz, 256M
> > >
> > > I'm not sure how to explain this bug, I came across it by accident.
> > >
> > > If I first run the following scene (with photons and dispersion) it
> > renders
> > > as expected with the photons creating a prism effect.  Now the tricky
> > part,
> > > run a different scene file with radiosity (e.g.. cornell.pov included
> with
> > > the Beta install)
> > > and then go back and try rendering the following scene again.  Now the
> > > photons are not affected by the dispersion.  If you close and reopen
3.5
> > it
> > > renders fine again.
> > >
> > > -tgq
> > >
> > > The scene (I've tried to make it as short as possible):
> > >
> > > ---start scene---
> > >
> > > global_settings{photons{spacing 0.01 count 100000 autostop 0}}
> > >
> > > camera{
> > >   direction<0,0,1>
> > >   up<0,1,0>
> > >   right<4/3,0,0>
> > >   location <0,7,-25>
> > >   look_at  <0,7,0>
> > > }
> > >
> > > light_source{0 color <1,1,1>*3 translate <0,15,0>}
> > >
> > > difference{
> > >   box{<-16,-1,-16><16,16,16>}
> > >   box{<-15,0,-17><15,13,2>}
> > >   box{<-.05,12,2><.05,15,-.5>}
> > >   texture{
> > >     pigment{color <1,1,1>}
> > >     finish{ambient 0 diffuse 0.7 brilliance 0.4}
> > >   }
> > > }
> > >
> > > difference{
> > >   box{<-8,5,-10> <4,10,10>}
> > >   plane{-y 0 rotate z*-75 translate<0,7,1>}
> > >   material{
> > >     texture{
> > >       pigment{rgbf<1,1,1,1>}
> > >       finish{conserve_energy  reflection {0 1 fresnel on}}
> > >     }
> > >     interior{ior 1.55  dispersion 1.1}
> > >   }
> > >   photons {target  refraction on  reflection on  collect off}
> > > }
> > >
> > > ---end scene---
> > >
> > >
> > >
> > >
> > >
> >
> >
>
>

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