I have shot about 1Gb of photons, the shadows /
reflection seems very accurate, but despite dispersion
(and a rather dispersion_samples setting) the highlights
do not show color, except when pointing at the camera.
How so? ( I'm using 3.5 for windows... time to upgrade?)

    interior
     {
      ior 2.0
      dispersion 1.15
      dispersion_samples 50

      fade_distance 5.0
      fade_power 2.0

      caustics 2
     }


-- 
Steven Pigeon, Ph. D.
ste### [at] stevenpigeoncom
ste### [at] videotronca

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Nice! What would be the source of the color then? Your light looks white or 
perhaps vaguely blue. The only time I've seen much color in prisms is when 
they are optically active and the light is polarized. Now make POV do that! 
:)
DLM

"Steven Pigeon" <pig### [at] iroumontrealca> wrote in message 
news:428161d0@news.povray.org...
>
> I have shot about 1Gb of photons, the shadows /
> reflection seems very accurate, but despite dispersion
> (and a rather dispersion_samples setting) the highlights
> do not show color, except when pointing at the camera.
> How so? ( I'm using 3.5 for windows... time to upgrade?)
>
>    interior
>     {
>      ior 2.0
>      dispersion 1.15
>      dispersion_samples 50
>
>      fade_distance 5.0
>      fade_power 2.0
>
>      caustics 2
>     }
>
>
> -- 
> Steven Pigeon, Ph. D.
> ste### [at] stevenpigeoncom
> ste### [at] videotronca
>
>

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The light going through the prism should normaly
disperse (the glassy material is not perfectly straight,
there is a small warping in its normal, that should
accentuate the effect.)

The color seems to vary with the photon density.
At lower density, more color shows. But it's also
much granier.


-- 
Steven Pigeon, Ph. D.
ste### [at] videotronca
"dlm" <me### [at] addressinvalid> wrote in message 
news:42817e47$1@news.povray.org...
> Nice! What would be the source of the color then? Your light looks white 
> or
> perhaps vaguely blue. The only time I've seen much color in prisms is when
> they are optically active and the light is polarized. Now make POV do 
> that!
> :)
> DLM
>
> "Steven Pigeon" <pig### [at] iroumontrealca> wrote in message
> news:428161d0@news.povray.org...
>>
>> I have shot about 1Gb of photons, the shadows /
>> reflection seems very accurate, but despite dispersion
>> (and a rather dispersion_samples setting) the highlights
>> do not show color, except when pointing at the camera.
>> How so? ( I'm using 3.5 for windows... time to upgrade?)
>>
>>    interior
>>     {
>>      ior 2.0
>>      dispersion 1.15
>>      dispersion_samples 50
>>
>>      fade_distance 5.0
>>      fade_power 2.0
>>
>>      caustics 2
>>     }
>>
>>
>> -- 
>> Steven Pigeon, Ph. D.
>> ste### [at] stevenpigeoncom
>> ste### [at] videotronca
>>
>>
>
>

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Steven Pigeon nous apporta ses lumieres en ce 2005-05-11 03:35:
> I have shot about 1Gb of photons, the shadows /
> reflection seems very accurate, but despite dispersion
> (and a rather dispersion_samples setting) the highlights
> do not show color, except when pointing at the camera.
> How so? ( I'm using 3.5 for windows... time to upgrade?)
> 
>     interior
>      {
>       ior 2.0
>       dispersion 1.15
>       dispersion_samples 50
> 
>       fade_distance 5.0
>       fade_power 2.0
> 
>       caustics 2//???
>      }
> 
> 
> 
Why are you using caustics? Normaly, when you sue photons, you don't use caustics. In
fact, you drop 
the fake caustics to replace them with true ones.

Alain

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I'll remove them and see what happens
Thanks for pointing that out.

Best,

    S.

-- 
Steven Pigeon, Ph. D.
ste### [at] stevenpigeoncom
ste### [at] videotronca
"Alain" <ele### [at] netscapenet> wrote in message 
news:42829501$1@news.povray.org...
> Steven Pigeon nous apporta ses lumieres en ce 2005-05-11 03:35:
>> I have shot about 1Gb of photons, the shadows /
>> reflection seems very accurate, but despite dispersion
>> (and a rather dispersion_samples setting) the highlights
>> do not show color, except when pointing at the camera.
>> How so? ( I'm using 3.5 for windows... time to upgrade?)
>>
>>     interior
>>      {
>>       ior 2.0
>>       dispersion 1.15
>>       dispersion_samples 50
>>
>>       fade_distance 5.0
>>       fade_power 2.0
>>
>>       caustics 2//???
>>      }
>>
>>
>>
> Why are you using caustics? Normaly, when you sue photons, you don't use 
> caustics. In fact, you drop the fake caustics to replace them with true 
> ones.
>
> Alain

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Sorry, I'm new to povray and I use a modeler. I have been messing around
with photons and glass and was wondering what the photon block or code was
that you added to each object.
This what I have managed to make
General stuff some photons
www.teampki.com/~cyris69/renders/
All glass + photons this is where u can see how i have used them
www.teampki.com/~cyris69/renders/glassroom.html
If anything could you help me out by emailing me at cyr### [at] insightbbcom
Thanks, and beautiful work I might add.

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Cyris69 nous apporta ses lumieres en ce 2005-05-22 09:03:
> Sorry, I'm new to povray and I use a modeler. I have been messing around
> with photons and glass and was wondering what the photon block or code was
> that you added to each object.
> This what I have managed to make
> General stuff some photons
> www.teampki.com/~cyris69/renders/
> All glass + photons this is where u can see how i have used them
> www.teampki.com/~cyris69/renders/glassroom.html
> If anything could you help me out by emailing me at cyr### [at] insightbbcom
> Thanks, and beautiful work I might add.
> 
With comments:
photons{target//enable the object to receive and interact with the photons
  refraction on//enable photons refraction for that object
  reflection on//enable photons reflection for that object
  collect off// disable showing the photons effect from other objects
//usefull for mostly transparent or highly reflective objects
}
The default are:photons{target off refraction off reflection off collect on}
In glassroom6.bmp, you need more photons: reduce the spacing OR increase the count.
I see much facing, you need to set your meshes to a finer setting.

Alain

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