> object {IconObject scale <1,-1,1> pigment {color rgbt <1,1,0,0.3>}}

And of course I could use a gradient for the pigment, true.

I'll see. I think all those different solutions have their pros and cons.

In this case, as a complexer object could have many pigments
itself, I wonder how to have a modifying pigment just influencing
the transmission part of rgbt.

color*<1,1,1,factor> ?

Bye, Olaf.

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