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"Kenneth" <kdw### [at] gmailcom> wrote:
>
> As far as filter/transmit goes, color-filtering can be done in the
> density-statement's color_map. I.e., instead of using a single red-ish
> media like
> emission 1.5*<.3,1,.5>
Sorry, that's not 'red-ish' at all; I meant 1.5*<1,.5,.3> (and <1,.5,.3> in the
color_map example).
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