Quote Originally Posted by torstan View Post
Okay, I pulled out the rock area, selected it and stroked it with Gimp's default pencil sketch#2 brush with a .4 jitter. I used the selection to cut out the strokes that fell within the tunnels and set the whole layer to overlay. Got this result:

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Similarly with the same procedure and the galaxy brush with a jitter of .7 and reduced spacing, gives this:

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Both quite nice actually. I'm not sure I'll keep them, but its a technique I'll work with in the future I think.
Cool! Glad you liked it. Like I said, I used it on a coastline one day. Here is the original:
http://www.cartographersguild.com/sh...93&postcount=9

And the one with more stuff done and where I stroked the coastline:
http://www.cartographersguild.com/sh...0&postcount=19

I know had I had the jitter set really high, but I am not sure what tool I used, I "think" I used the smear tool. I did this on a copy of the land layer, set it to overlay or soft light(I think??) and put it between the water layer and the land layer in a nice sandwich. I ended up really liking the wispy effect it made with the lighter shallows quite a bit, so will be playing with that technique some more.

Joe