He forgot to mention it doesn't test for all colors in a scene, it tests
for a pigment you feed it. By the, Chris, how would use use eval_pigment
for smoke?

~Sam


Chris Huff wrote:

> In article <3952db8e@news.povray.org>, "Bob Hughes"
> <per### [at] aolcom?subject=PoV-News:> wrote:
>
> > But I still don't understand anything about eval_pigment yet.
>
> It is quite simple:
> A pigment simply defines a color for each point in space, using a color,
> image, or pattern + color_map. The eval_pigment returns the rgb color of
> the pigment at a specified point of space.
> Since a color is basically a vector, you can use this to pattern
> interesting displacements like wind-blown grass, rock placement in a
> stream, smoke particles, etc...you can get much more variation and
> control than you would get with just turbulence.
>
> --
> Christopher James Huff - Personal e-mail: chr### [at] maccom
> TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
> Personal Web page: http://chrishuff.dhs.org/
> TAG Web page: http://tag.povray.org/

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