[pstricks] transparency

[Herbert Voss]

Pedro Jorge Caridade wrote:

> Has far has I know, standard postscript don't have a transparency
> option. Right? Is there any chance to make some kind of a copy of a
> region and simulate some transparency. Like the mixing colors example of
> Dennis.

PostScript is by default tranparent, unless you do not fill
  a region with a color.

> The goal of it is to emphasize some region of a pspicture, for example
> with a psframebox, putting the rest in gray (some transparent overlay)

no problem, when you draw it twice, the second time with
a color like lightgray.

Herbert



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