In article <web.3daa28bc7d95834218ccf4f70@news.povray.org>,
 "Rohan Bernett" <rox### [at] yahoocom> wrote:

> There are pigments with more than one rgb, such as the checker and hexagon
> patterns.

But that is an entirely different case: one pigment with one pattern 
that takes several solid colors instead of a blend of colors. This is 3 
pigment items in a place where there should only be 1.
A triangle_blend pattern would at least be consistent, but wouldn't be 
very useful.

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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