> I see no mention of gamma in Mr. Moreland's article, nor in any of the
> papers he linked.

Hi Cousin,
Thanks for your comment and interesting question. I am not sure that 
gamma correction is so important for scientific visualization. This is 
not photography, where we trying to achieve highest realistic level, 
colors only helps to interpret model more accurate, they are 
'suppositive' here.

I any case, if someone need it, he can implement macro, processing data 
array according his requirements (thanks to Bald for advice to store 
data separately of their interpretation).

 > I am unfamiliar with MatLab.  Does it address color gamma?

As to Matlab, yes, it has methods for gamma correction, but not at 
colormap, but at image level:
https://www.mathworks.com/help/images/ref/lin2rgb.html
--
YB

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