[NTG-context] shading in metapost

[Hans Hagen]

Thomas A. Schmitz wrote:

> I never thanked you for your message; sorry about that! Unless I'm  
> missing something, this page is just about transparency, but that  
> works quite well in metafun; it was the combination of transparency  
> and shading which I couldn't get right.

in mkiv at some point this may work because there transparency and color 
are separated, but there will be no changes to metafun till mplib is 
around

Hans

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