Quote Originally Posted by Ascension View Post
If you're talking about the dark woodcut lines then you could do that with the Wind filter. Make a white layer then make a selection of the land, increase the size of the selection to suit, new layer, fill with black, deselect, merge down, Filter - Distort - Wind (use from left and from right a couple of times), then mask off the area to be visible (or simply delete the lighter tones with Select - Color Range). You could also add a bit of a wave to the lines with the Ripple filter...Filter - Distort - Ripple.
That was the first way I tried it. I think it works better this way: Selection of land, expand to suit, feather to suit, fill with white, add noise, horizontal motion blur to suit, then sharpen. After you sharpen (sometimes I sharpen two or three times), adjust brightness and contrast and your set.

Depending on the size of my map the wind filter was hell on my processor.