Maybe your fade distance in your
interior is too small. Try fade distance
1.0, or more. A "natural" fade power
is 2.0, as in real life: intensity is inversely
proportionnal to the square of the distance.


Also, I think count and spacing are mutually
exclusive. I do not know which one "wins"
when both are specified.

Best,

    S.

"CFM" <nomail@nomail> wrote in message
news:web.409a8149d855a4115c168f750@news.povray.org...
> Here's the programming language used to render the image I'm posting.
Notice
> there are no rainbow-style effects refracting onto the ground. How do I
get
> proper refraction?
>
> #include "colors.inc"
> #include "textures.inc"
> #include "finish.inc"
> #include "glass.inc"
> global_settings {
>   max_trace_level 12
>   photons {
>     count 100000
>     spacing .01
>     autostop 0
>     jitter .2
>   }
> }
> camera {
>   location <0,7.5,-10>
>   look_at 0
> }
> light_source {<1000,1000,-1000>rgb<1,1,1>
>   photons {refraction on
>            reflection on}
> }
> background {rgb<.7,.7,1>}
> plane {<0,1,0>,-1
>   pigment {rgb<.5,.5,.5>
>   }
>   finish {ambient 1}
>   photons {collect off}
> }
> sphere {<5,1,0>,2
>   texture {T_Old_Glass}
>   finish {ambient 0
>           diffuse .5
>           reflection .25
> } interior {ior 1.5
>             dispersion 1
>             caustics .25
>             fade_distance .25
>             fade_power .25}
>   photons {
>     target 1
>     refraction on
>     reflection off
> }
> cylinder {<-3,0,0>,<-3,4,0>,1
>   texture {T_Old_Glass}
>   finish {ambient 0
>           diffuse .5
>           reflection .25}
>   interior {ior 1.5
>             dispersion 1.1
>             caustics .25
>             fade_distance .25
>             fade_power .25
>   photons {target 1
>            refraction on
>            reflection off
>   }
> }
>


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