Xplo,
Yes, they emit almost all energy at 589nm, if I remember.   I had
thought some about using a post render filter though I do not have Photoshop.
I tried to 'pre-process' the pigments in all my textures, but so far at least
I have not gotten it right.   Have others gotten this kind of thing to
work?

If I write the filter myslef, I am pretty sure I need to figure out the
minimum intensity of color I can keep in the RGB ratios which best match the
wavelength of the real color? Am I off track?
Bill P.

>
> Are those the bright yellow ones that seem to destroy most of the colors
> viewed under them, like you were looking through a yellow filter or
> something? If so, you might consider using Photoshop (if you have it) to
> post-process the image.. might be easier than trying to get the right
> look inside POV-Ray (with all the associated test renders).
>
> -Xplo

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