feestje nous illumina en ce 2008-11-03 07:05 -->
> I made a version with loop. I believe it will work. only problem i heve is with
> the lighting. I want to use a plane that emits light. This is the codeI am
> using:
> 
> light_source
> { <0,0,0>, 1
>   looks_like {
>   plane {
>      z, 1000
>      pigment {
>          color White  }
>              finish {
>           ambient 1 }
> 
> }  }}
> 
> 
> it seems the only light production from this code is because of the ambient
> statement.
> 
> is it even possible to have a plane emit light?
> 
> Regards, Ruud
> 
> 
You can have any object emit light, but not with a plain scene.

For that, you need to use radiosity. In a scene with radiosity enabled, ANY 
object with a non-zero ambient value will act as a light source.
An object with a negative pigment or with a negative ambient will shed darkness.

The simplest radiosity setting is:

global_settings{radiosity{}}

In a radiosity scene, you should turn off the default ambient:

#default{finish{ambient 0 diffuse 0.9}}

Some will tell you to add "ambient_lights 0" to the global settings, but it will 
remove any ambient, and you won't be abble to use high ambient object as light 
sources.

Please consult the documentation and help files for more radiosity informations.

-- 
Alain
-------------------------------------------------
You know you've been raytracing too long when you see something in the real 
world and you think, "Hey! How did they get that effect?"

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