I've made some other tryout and I've come to a functioning technique
that I don't like very much though.
The only way I've found, by now, consists in making use of two planes,
the one on top of the other.
I build first an underlaying yellow emitting square plane, then I modell
another plane obove the first, this second plane having a black letter
on transparent background file texture.
This way I get a correct yellow emission in the background and a clear
black letter above it (the alpha channel of the c letter file makes me
see through it).
But I would like not to use two distinct planes for such a simple 3d
object. I'd like to make it even simpler then that; I wonder if there's
a way to let the .ac file describe this modelling scenario too.
Roberto
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