I'm copying a drawing in Inkscape to be able to enlarge it and use it to print a t-shirt.
The original is this:
And the one that I made is this (far from perfect, but the best I my abilities allow right now):
My question is: How can I make that "airbrush" effect, either in Inkscape or GIMP?
Also, is "airbrush" a correct term for that effect?