Results 1 to 7 of 7

Thread: Playing with random coastal techniques

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1

    Post Playing with random coastal techniques

    I have been working at getting nicer looking coastlines in GIMP.

    Here is my latest experiment:
    coast_test.png

    This consisted of a lower layer started with high detail rendered clouds, then high level detailed random difference clouds applied about 4 times.

    Next layer up is rendered cloud, large scale, high detail. I kept changing the seed until I found a preview that had the shape I wanted. Set this mode to screen.

    Top layer (my three-layer-sandwich standard technique for non-destructive coastline generation) is 50% grey set to lighten mode.

    I went back and adjusted the middle layer levels to control the coast position and number of islands..

    Select by colour (merged levels) and save selection to a channel.

    I find the coast to be deliciously detailed, and there was absolutely no touch-up, I would think this is nice looking large continent scale....opinions?

    (I might have to script this technique...since I like the results)

    -Rob A>

  2. #2

    Default

    Looks really nice.

    Would like to do that in Photoshop...

  3. #3

  4. #4
    Guild Journeyer Bohunk's Avatar
    Join Date
    Feb 2007
    Location
    Cleveland
    Posts
    231

    Post

    I like it, its got a good feel to it. Would it be possible to put this coastline and a somewhat smoother coastline on the same map without too much difficulty?

  5. #5

    Post

    Definitely looks great. Did you start with a feathered white blob as you did with the 'not so random coastline' tutorial?
    Would it be possible to put this coastline and a somewhat smoother coastline on the same map without too much difficulty?
    D'oh! Why didn't I think of that?

    (you don't quite get the same effect with a blurred shape, but...)

    Bottom Layer (same as previous example):
    coast_test_layer1.png

    Middle Layer (Screen Blending Mode):
    coast_test_layer2.png

    Top layer 50 % grey (Lighten Blending mode):
    coast_test_layer3.png

    After selecting the 50% grey with 0 tolerance using the colour select tool, and copying selection to a channel:

    Variable randomness coast, based on a blurred shape:
    coast_test_variable.png

    Might have to video this

    -Rob A>

  6. #6
    Community Leader jfrazierjr's Avatar
    Join Date
    Oct 2007
    Location
    Apex, NC USA
    Posts
    3,057

    Post

    Quote Originally Posted by RobA View Post
    Might have to video this

    -Rob A>
    Yes Yes Yes!!!!

    RobA, you never cease to amaze.

    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
    ----------------------------------------------------------
    Unless otherwise stated by me in the post, all work is licensed under a Creative Commons Attribution-Noncommercial 3.0 United States License.

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •