It can be done in gimp using eraser
set eraser to fade out (length as height of layer)
start at top and erase down in a straight line
repeat side by side but dont miss any bits or go over an adjacent erase
hope this makes sense
(
CanonCaliber A big bore,
Sat 12 Apr 2008, 13:20,
archived)
I did this in the end,
but I made a custom long thin brush so I could do it in one sweep instead of doing it loads with a normal brush. Ta.
(
Bob Todd whee,
Sat 12 Apr 2008, 13:27,
archived)