I am trying to make a scene with an object on an infinite white plane;
however, the only way to make the plane's diffuse color not react with my
lights is to crank the ambient up to 1, but if I do that, I will get no
shadows from the object on the plane. Any ideas on how to make this work?

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Oldstench wrote:
> 
> I am trying to make a scene with an object on an infinite white plane;
> however, the only way to make the plane's diffuse color not react with my
> lights is to crank the ambient up to 1, but if I do that, I will get no
> shadows from the object on the plane. Any ideas on how to make this work?

I don't really understand your problem, what do you mean by 'not react
with my lights'?

Christoph

-- 
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I think I know what you want to do. Only thing I could come up with in a
texture-only sort of way:

/* nonaffect of light on a planes pigment diffusion */

#declare Norm=1;

camera {
  location  <0,2,-4>
  right x*image_width/image_height
  look_at   y
}

light_source {
  <0,1000,0>, 1
  rotate <-60,0,-60> // rotation off y
}

plane {
  y, 0
  pigment {rgb 1}
 #if (Norm)
  normal {gradient y 1 // matching light position (axis)
         ramp_wave
         scale 1000000 // sufficiently large scale to cover area
         rotate <-60,0,-60> // matching light rotation
  }
 #end
  finish {ambient 0.1 diffuse 0.6}
}

sphere {
        y,1
        pigment {
                color rgb 1
        }
}

This effectively sets up a normal that gives a uniformity to the light
shining on the plane. This was a quick attempt at it and so I don't know if
it'll work out well under other circumstances. It might need elaboration of
the idea.
My first thought was you needed a light_group but thought that to get both
shadow and non-diffusing together could prove difficult or impossible.
However, I didn't even try to find out so maybe that's another way.

bob h

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I think what you want is brilliance 0.

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Simon Adameit <gom### [at] gmxde> wrote in message
news:3d0359e3@news.povray.org...
> I think what you want is brilliance 0.
>

Thank you, that is exactly what I wanted.

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