Am 11/22/2015 um 20:55 schrieb Mike Horvath:
> I am trying to re-render the Munsell color cylinder scene from the
> object collection. However, the results look too drab. Compare it to this:
>
> https://commons.wikimedia.org/wiki/File:Munsell_1929_color_solid.png
>
> Does anyone have any tips to improve the render?
>
>


As Cousin Ricky did dig up that this xyY data uses illuminant C you need 
to "tell" this CIE.inc otherwise you won't get the hues right.
There is the macro CIE_ReferenceWhite() for exactly this purpose. The 
CIE.inc default is D50 (not D65!) as all reflectance data that 
accompanies lightsys uses D50 (and all spectrophotometer I am aware of).
Anyway, a call to CIE_ReferenceWhite with the appropriate illuminant 
will result in a recalculation of the chromatic adaption matrices and 
the xyz->rgb transformation matrices.

For the washed out look of your render itself, if you want to reproduce 
the image of the wikipedia page: there is the 3d shading look just faked 
(by making the block sides slightly darker than the tops) so no GI and 
not even a light source is used. This makes sense because the focus of 
this image is the hue of the Munsell colors.

-Ive (who once wrote CIE.inc but is meanwhile retired and ATM quite 
addicted to Dota2)

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