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Thread: Playing with random coastal techniques

  1. #1
    Administrator RobA's Avatar
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    Post Playing with random coastal techniques

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

    Here is my latest experiment:
    Click image for larger version. 

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    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

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    Looks really nice.

    Would like to do that in Photoshop...

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  4. #4
    Guild Journeyer Bohunk's Avatar
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    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
    Administrator RobA's Avatar
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    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):
    Click image for larger version. 

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    Middle Layer (Screen Blending Mode):
    Click image for larger version. 

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    Top layer 50 % grey (Lighten Blending mode):
    Click image for larger version. 

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    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:
    Click image for larger version. 

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    Might have to video this

    -Rob A>

  6. #6
    Community Leader jfrazierjr's Avatar
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    Post

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

    -Rob A>
    Yes Yes Yes!!!!

    RobA, you never cease to amaze.

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  7. #7
    Guild Member DanChops's Avatar
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    Default

    This looks really phenomenal Rob. I look forward to the video.

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