POV-Ray : Newsgroups : povray.advanced-users : Photons, in version 3.6 to 3.7 : Re: Photons, in version 3.6 to 3.7 Server Time: 17 Jun 2019 12:35:26 GMT
  Re: Photons, in version 3.6 to 3.7  
From: Thomas de Groot
Date: 8 May 2019 06:41:28
On 7-5-2019 18:28, Albun wrote:
> Hi,
> 
> With 3.6 version, i use a photon #macro like under this line, and the 'no_image'
> for object, to see the refraction appeer on a plane and it's ok.
> But with the 3.7 version, and the same file, there is nothing appeer on plane,
> and no photons count on render.
> 
> #macro PhotonBlock()
>   #if(Photons)
>    photons {
>     target
>     collect off
>     reflection off
>     refraction on
>    }
>   #end
> #end
> 
> Do you see a solution with 3.7 language ?
> 

You didn't tell, do you have a photons statement in the global_settings? 
That is essential.

either:
global_settings {
   photons {
     spacing 0.02
   }
}

or:
global_settings {
   photons {
     count 1000
   }
}

Also, the photons-receiving objects need a photons definition, like the 
following example:

plane {
   y, 0
   texture {
     pigment { color srgb <1.0, 0.8, 0.6> }
   }
    photons {collect on}
}

Maybe also the light source:

light_source {
   <100, 300, 500>
   color rgb 1.0
   parallel
   photons {
     refraction on
     reflection on
   }
}

See the appropriate sections in the docs.

-- 
Thomas


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