The other option is less useful for mapping but might have some artistic uses...
You can use a map with transparency, and it will use the alpha as the density map, and the colour as the colour to paint with.
Here is such a density map:
and the result, using the hex brush again:
Enjoy!
-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
My Maps: Finished Maps ~ Challenge Entries ~ My Portfolio: www.cartocopia.com
Rob that is phenomenal! I wonder if it's possible to write a script that does this in photoshop?
The drool is running down my chin as I type. This is GREAT. I can't wait to try it out.
Joe
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.
Cool. I'll have to try this. It looks like you might be able to use the alpha-and-color option to cause interesting variation in tree(or mountain or whatever) color. For instance, with trees, create a layer with a narrow variation of green shades. (Possibly use a greyscale fractal and gradient map with a narrow gradient(say dark green to light green)).
Another idea I have is to make an initial color layer that varies only in hue and saturation, and apply a variation in value by multiplying with the shaded relief from an HF.
Then you paint in your desired forest density in alpha.
Might be a good way to add an interesting forest texture to a shaded relief map.
I was initially thinking of using top-down trees for a realistic look, but I think this might work best all symbolical, with iso trees simply as a symbol saying, "forest here."
If nothing else, this is making GIMP look like a more and more viable alternative to CC for "symbol"-type maps.
Last edited by su_liam; 07-07-2008 at 01:46 PM.
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Klarr
-How to Fit a Map to a Globe
-Regina, Jewel of the Spinward Main(uvmapping to apply icosahedral projection worldmaps to 3d globes)
-Building a Ridge Heightmap in PS
-Faking Morphological Dilate and Contract with PS
-Editing Noise Into Terrain the Burpwallow Way
-Wilbur is Waldronate's. I'm just a fan.
One limitation is that it doesn't respect active brush scaling, so all images are drawn at the original scale of the selected brush. Initially, I hoped to have an options to paint smaller versions based on the density map, but dynamic brush scaling isn't exposed in the scripting API (yet).
-Rob A>
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
My Maps: Finished Maps ~ Challenge Entries ~ My Portfolio: www.cartocopia.com
Oh my... this is very cool... an excellent tool!
I agree. Great tool Rob, I'm going to try it as soon as possible.
Torq
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Software Used: Terranoise, Wilbur, Terragen, The Gimp, Inkscape, Mojoworld
This is a bit like saying:Originally Posted by RobA
"I've found a way of teaching my dog how to play chess, but he's not very good as he's unable to master the Vienna Gambit."
So does any of this port over to the PhotoShop tools at all? I know there are scatter settings on brushes, would it be similar to that?
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