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Thread: GIMP How? The S. John Ross Woodcut technique

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    Post Gimp Script: Greyscale Dither

    Or a nicer dither can be obtained by using the attached gimp script (greyscale dither) that I wrote, along with a suitable woodcut dither pattern. I've attached two as samples. There are many more dither patterns here where I found the technique.

    The scriptshows up in the menus as Filters->Distorts->Greyscale Dither.

    It only works on RGB images. The cleanest results can be obtained by first scaling up the B&W layer to be dithered, then scaling it back down again. (It is optimized to produce a pure B&W image in the default mode. The greyscale modes are a bit of an experiment and aren't true to the dithering technique).

    Lastly, I attached the result of running this script on the provided S. John Ross sample, scaling it up 200%, using the woodcut 100 as a dither pattern, then scaling it back down by 50%.

    -Rob A>
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  3. #3
    Guild Journeyer msa's Avatar
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    Three cheers for RobA!

    Hip hip, horray!
    Hip hip, horray!
    Hip hip, horray!

  4. #4

    Post

    Thank you, that's all very helpful. I still can't figure out haw to get that initial fade-to-white coastline, however.

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