"Edward C." wrote:
> 
> Nieminen Juha wrote in message <37c4f1f9@news.povray.org>...
> >  Are you sure? The weights for the color components are calculated with:
> >
> >0.2125*R + 0.7154*G + 0.0721*B
> >
> >  If we substitute R, G and B with 1's, we get exactly 1.
> 
> I haven't seen that particular formula.  I have seen in the code:
> 0.287R+0.589G+0.144B which gives 0.990 with 1,1,1
> 0.229R+0.589G+0.144B -> 0.930
> And one which does work:
> 0.30R+0.59G+0.11B -> 1.00

Interesting.  I never really looked that closely at them and so I thought
they were all the same and were correct.  Strange.

-Nathan

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