🚀 go-pugleaf

I asked this question before without success (not even an answer).
Is it possible to do gradiant filling in postscript? Can I make
a small subroutine (function) that will take points of a triangle
and color at each of them and draw the triangle with interpolated
colors inside the triangle without using "colorimage"? Do I have
to use "colorimage"? Speed is not my main concern here.

A while back, I read in PCMag review of vector based graphics
translator that Postscript could do gradient fills. I have looked
in the reference manual, but I could not find anything about it.
The only reference I found so far was in the "green book", chapter
8, where they show a square filled black to white using the
"image" operator.

That type of thing is done on Silicon Graphics workstations without
a second thought.

Any kind of help (references or other) on this will be welcome, thanx

Richard Lefebvre
sotbill@vax2.concordia.ca