global_settings{
  assumed_gamma 1.0
  ambient_light 0

    radiosity
    {
      normal on
      pretrace_start 0.08
      pretrace_end   0.01
      count 100
      nearest_count 10
      error_bound 0.02
      recursion_limit 1
      low_error_factor 0.2
      gray_threshold 0.0
      minimum_reuse 0.015
      brightness 1.0
      adc_bailout 0.01/2
  }
}

camera {
        location <5, 5, 5> // standard angle

        right x*image_width/image_height

        look_at <0, 0, 0>   // standard center shot
}

  light_source {
    <0,0,0>
    color rgb <1,1,1>

    looks_like {
      sphere { <0,0,0>, 1 pigment { rgb<1,1,1> }  finish {ambient 0 diffuse
1}}
    }

  }


--
Edward Leibnitz

edw### [at] verizonnet

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never - mind got it ......

tweaked some settings etc .....
done

thanks

"Edward Leibnitz" <lei### [at] rcncom> wrote in message
news:3eadb283$1@news.povray.org...
> global_settings{
>   assumed_gamma 1.0
>   ambient_light 0
>
>     radiosity
>     {
>       normal on
>       pretrace_start 0.08
>       pretrace_end   0.01
>       count 100
>       nearest_count 10
>       error_bound 0.02
>       recursion_limit 1
>       low_error_factor 0.2
>       gray_threshold 0.0
>       minimum_reuse 0.015
>       brightness 1.0
>       adc_bailout 0.01/2
>   }
> }
>
> camera {
>         location <5, 5, 5> // standard angle
>
>         right x*image_width/image_height
>
>         look_at <0, 0, 0>   // standard center shot
> }
>
>   light_source {
>     <0,0,0>
>     color rgb <1,1,1>
>
>     looks_like {
>       sphere { <0,0,0>, 1 pigment { rgb<1,1,1> }  finish {ambient 0
diffuse
> 1}}
>     }
>
>   }
>
>
> --
> Edward Leibnitz
>
> edw### [at] verizonnet
>
>

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IYou cannot really do "glows" like this but...

I removed "ambient_light 0" and the sphere appears !
then
I made some changes, add a plane to see the "light" spread on a floor...
Try this :

global_settings{
    assumed_gamma 1.0
    //ambient_light 0

      radiosity
      {
        normal on
        pretrace_start 0.08
        pretrace_end   0.01
        count 100
        nearest_count 10
        error_bound 0.02
        recursion_limit 1
        low_error_factor 0.2
        gray_threshold 0.0
        minimum_reuse 0.015
        brightness 1.0
        adc_bailout 0.01/2
    }
  }

plane {y, -1.0 pigment {rgb 0.8}}

camera {
  location <5, 5, 5>
  look_at <0, 0, 0>
  }

union {
  light_source {0.0, 1.0}
   sphere { <0,0,0>, 1 pigment { rgb 1.0 }  finish {ambient 1.0 diffuse 
0.0}}
   }

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LightBeam nous apporta ses lumieres ainsi en ce 2004/04/02 16:01... :

> IYou cannot really do "glows" like this but...
>
> I removed "ambient_light 0" and the sphere appears !
> then
> I made some changes, add a plane to see the "light" spread on a floor...
> Try this :
>
> global_settings{
>    assumed_gamma 1.0
>    //ambient_light 0
>
>      radiosity
>      {
>        normal on
>        pretrace_start 0.08
>        pretrace_end   0.01
>        count 100
>        nearest_count 10
>        error_bound 0.02
>        recursion_limit 1
>        low_error_factor 0.2
>        gray_threshold 0.0
>        minimum_reuse 0.015
>        brightness 1.0
>        adc_bailout 0.01/2
>    }
>  }
>
> plane {y, -1.0 pigment {rgb 0.8}}
>
> camera {
>  location <5, 5, 5>
>  look_at <0, 0, 0>
>  }
>
> union {
>  light_source {0.0, 1.0}
>   sphere { <0,0,0>, 1 pigment { rgb 1.0 }  finish {ambient 1.0 diffuse 
> 0.0}}
>   }

Remove the light and there is absolutely NO difference. The light is at 
the center of the opaque sphere.

Alain

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Alain wrote:
> Remove the light and there is absolutely NO difference. The light is at 
> the center of the opaque sphere.
> 
> Alain

I know, but I forgot it !

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