> Above is all my code,I have some confusions:
> 1,"SpectralEmission(E_D65)* 1.33015" my solar irradiance in 730nm is 1.33015.Can
> I set statements like that ?
> 2,how does pov calculate the luminance value of each pixel in final image,having
> some forlums?
> 3,I want to know  pov use phong or whitted model to calculate the luminance of
> each pixel in screen?
> I am so sorry to trouble,but these problems have confusing me for a long time.I
> am so sad.Thank you!
>
>
>

1 - Yes. "SpectralEmission()" return a colour vector. When you multiply 
a vector by a number, you realy perform this:
<0.1,0.2,0.05>*1.33015 is transformed as:
<0.1,0.2,0.05>*<1.33015,1.33015,1.33015> or:
<0.1*1.33015, 0.2*1.33015, 0.05*1.33015>

2 - Not sure what your "forlums" mean.

3 - As has been mentioned before, POV-Ray use the Phong lighting model.



Alain

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