As a quick suggestion - instead of stroking the selection, turn the selection into a path and stroke the path.
I have discovered that this seems to give significantly better results. (The conversion to a path does some bezier interpolations around the selection that seem to prevent some "jaggie" artifacts that stroking a selection seems to have.) Now this might not matter when the jitter is high, but try it and see if there is a difference.
-Rob A>
My tutorials: Using GIMP to Create an Artistic Regional Map ~ All My Tutorials
My GIMP Scripts: Rotating Brush ~ Gradient from Image ~ Mosaic Tile Helper ~ Random Density Map ~ Subterranean Map Prettier ~ Tapered Stroke Path ~ Random Rotate Floating Layer ~ Batch Image to Pattern ~ Better Seamless Tiles ~ Tile Shuffle ~ Scale Pattern ~ Grid of Guides ~ Fractalize path ~ Label Points
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Ah... yea, thats what I meant and left out. I create a path so I have it for later use in case I need it for something else I don't have to go try to get the selection right again. Did not know about some of the problems of just stroking the raw selection though, so thats good to know.
My Finished Maps
Works in Progress(or abandoned tests)
My Tutorials:
Explanation of Layer Masks in GIMP
How to create ISO Mountains in GIMP/PS using the Smudge tool
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Unless otherwise stated by me in the post, all work is licensed under a Creative Commons Attribution-Noncommercial 3.0 United States License.
Good tip. Sadly the xcf is now on a defunct laptop so, barring resurrection, this WIP is no more. I'll have a shot at those tips over the weekend when I have roped in the work computer to mapping duty.
My Finished Maps
Works in Progress(or abandoned tests)
My Tutorials:
Explanation of Layer Masks in GIMP
How to create ISO Mountains in GIMP/PS using the Smudge tool
----------------------------------------------------------
Unless otherwise stated by me in the post, all work is licensed under a Creative Commons Attribution-Noncommercial 3.0 United States License.
Thankfully that saved the paper I was writing, but not my maps. Priorities eh?