"Ian Crofoot" <nomail@nomail> wrote:
> I'm testing a scene with Christmas lights, and to get the effect of the
> lights I thought turning up the ambient values sufficiently high would work
> (with radiosity).  The only problem I run into is that four of the six
> colors of lights I use turn white when the ambient value is raised.  Two of
> them are function perfectly however.
>
> The scene file is rather large, so here is a link:
>
> http://www.geocities.com/iancrofoot/treeLit.txt

You'll get more people looking at your code if you try to isolate the
problem into a small scene we can easily read & run.

>
> Putting lightsources in all the bulbs would be HUGE pain, so this is the
> only method I can think of.  If there is a better method, or at least a fix
> to my problem, I would be pleased.

//---------- Ian's code ----------------------
#declare redlight_WingsMat =
  texture{
      pigment{ rgbf <0.866667, 0.00000e+0, 0.286667, 0.500000>}
      finish{
        ambient rgb 100
        diffuse 1.00000
        brilliance 1.00000
        specular 0.500000 roughness 5.00000e-2
        }
}
//---------- Ian's code ----------------------

I've only had a quick look at your scene, but if the section above is an
example of your problem, then I suggest not using white as your ambient
colour.
Instead use something like this:

 ambient rgb 100*<0.866667, 0, 0.286667>

Sorry, I haven't tested this out.

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