I have been unable to duplicate this problem.
Win2k, AMD Athlon, 256MB

Can anyone else duplicate it?

-Nathan

"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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