Can somebody please tell me why this light source only displays as a black
sphere
and I get a message that 'no pigment given'.

light_source {
         <0,8,0>
        color rgb 1.0
        looks_like { sphere {< 0,0,0 > 2.5 } }
        }

Thanks

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David Vincent-Jones wrote:
> 
> Can somebody please tell me why this light source only displays as a black
> sphere
> and I get a message that 'no pigment given'.
> 
> light_source {
>          <0,8,0>
>         color rgb 1.0
>         looks_like { sphere {< 0,0,0 > 2.5 } }
>         }
> 
> Thanks

Give the sphere a pigment.

-- 
Ken Tyler -  1100+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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Ken wrote in message <3818E74B.1F204AD2@pacbell.net>...
>
>
>David Vincent-Jones wrote:
>>
>> Can somebody please tell me why this light source only displays as a
black
>> sphere
>> and I get a message that 'no pigment given'.
>>
>> light_source {
>>          <0,8,0>
>>         color rgb 1.0
>>         looks_like { sphere {< 0,0,0 > 2.5 } }
>>         }
>>
>> Thanks
>
>Give the sphere a pigment.


Preferably with a high ambient.

Mark

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Mark Wagner wrote:
> 
> >Give the sphere a pigment.
> 
> Preferably with a high ambient.

But not higher than "1" !

Markus

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Markus Becker <bec### [at] zessuni-siegende> wrote:
:> Preferably with a high ambient.

: But not higher than "1" !

  Why not?

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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I rendered a sphere with a ambient value of 1.  Then I changed the
sphere's ambient value from 1 to one trillion and it didn't look
different and didn't take longer to parse and render.
Brendan Ryan

Markus Becker wrote:

> Mark Wagner wrote:
> >
> > >Give the sphere a pigment.
> >
> > Preferably with a high ambient.
>
> But not higher than "1" !
>
> Markus

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Nieminen Juha wrote in message <3819c7cd@news.povray.org>...
>Markus Becker <bec### [at] zessuni-siegende> wrote:
>:> Preferably with a high ambient.
>
>: But not higher than "1" !
>
>  Why not?


No reason, unless you are using radiosity.

Mark

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Andrea Ryan <ary### [at] global2000net> wrote:
: I rendered a sphere with a ambient value of 1.  Then I changed the
: sphere's ambient value from 1 to one trillion and it didn't look
: different and didn't take longer to parse and render.

  Don't try with radiosity.

-- 
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/

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Nieminen Juha wrote:
> 
> Andrea Ryan <ary### [at] global2000net> wrote:
> : I rendered a sphere with a ambient value of 1.  Then I changed the
> : sphere's ambient value from 1 to one trillion and it didn't look
> : different and didn't take longer to parse and render.
> 
>   Don't try with radiosity.

...or do try it with radiosity to see why it might be different.

-- 
Ken Tyler -  1100+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/

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Andrea Ryan wrote:
> 
> I rendered a sphere with a ambient value of 1.  Then I changed the
> sphere's ambient value from 1 to one trillion and it didn't look
> different and didn't take longer to parse and render.

So why bother? Leave it at "1"

Markus

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