[R-sig-Geo] "paint" transparent rectangle over line plot

[Markus Loecher]

Dear list members,
I have created a psp object (spatstat library) and can draw these lines easily with the plotLines() function.
However, I want to create a "fading away" effect by drawing line by line in some temporal order and in between each drawing overpaint a rectangle with a low value for transparency.
Is that possible ?

Thanks !

Markus