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Thread: [Award Winner] Using GIMP to Create an Artistic Regional RPG Map

  1. #501
      Seretur is offline
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    Layer Mode. That confused me at first as well, as it's not labeled Blend Mode in recent Gimps.

    What are you doing adjusting color level at this step? I thought the first time you do that is with the Land Clip layer, which comes after this step.

  2. #502
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    Wip

    Sorry.. I wasn't clear.. I continued onto the "Land Clip" step to get the colour levels, but didn't get the effect I wanted, so I kept moving back and forth between the two steps to see where I went wrong. I managed to get the Land Noise (Filter/Render/Clouds/Solid Noise) done right, with "Layers:Overlay" from the Layers Dock, and then created a New Layer (Land Clip), fill type:White; Lighten Only. Then I adjusted the Colour Levels to Output(71) (as in tutorial.. I know the actual number can be different). What I get is white "land" and gray "sea", with no cloud-like "landmass".

    here is what I've been able to do so far:
    Attached Files Attached Files
    Last edited by Yellow Eagle; 07-13-2010 at 03:34 PM. Reason: Added attachment

  3. #503
      Seretur is offline
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    So you get land and sea? Do you have a screenshot of what it looks like?

  4. #504
      Seretur is offline
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    Ah, that could do it. You skipped a step:
    Now invert the layer (Color->Invert) and blur the image (Filters->Bur->Gaussian Blur) The amount of blur will determine how random the final coast will be. The larger the blur, the more random the coastline will be (in the blurry area). If you have a well defined coast already (like here) use a smaller blur (50px). If you have a poorly defined coast (as is the case when using a random coast technique) make it a large blur.
    If you want to preserve the mini-inlet northeast of the big bay thing ( I'm incredibly geographically literate, aren't I? ), but randomize the rest a bit, try a 50px overall blur, select the inlet area with the lasso, and Select->Invert. Blur that (50-100px) and the inlet should be preserved, while the rest of the coast is a little more random.

    If you think your coast is just fine exactly how it is, you don't need to worry about this at all. This step is just to randomize the coast. If your coast is well-defined, and you like it, feel free to skip the Land Noise and the Land Clip, and go straight to the Land Mask.

    (( In the future, adding a new post with the attachment would be most convenient for everyone. Now it looks like I'm double posting ))

    EDIT: While I was typing, I was looking at your outline JPG. A lot of the definition got lost when you traced it, and I wouldn't recommend leaving your land layer how it is unblurred. If you want it to look closer to what you originally drew, try this:

    Click on your Background layer, hide everything else.
    Using the magic wand tool, select the sea.
    In your Land layer (or a new one if you don't want to destroy what you've got), fill the selection with black.
    Invert the selection (Select->Invert), and fill the new selection with white.

    This way, it will keep your original coastline exactly (or almost). Then you can leave it unblurred, if you like.
    Last edited by Seretur; 07-13-2010 at 04:07 PM. Reason: Update

  5. #505
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    I originally just duplicated the background layer to make a second outline, then filled in the land w/ black and sea w/ white. This latest "tracing" was an attempt to simplify the procedure . In the end, I'm going to use your suggestions, and basically skip the first segment and go straight to the "Land Mask" step after defining the land/sea.
    Thank You for the advice.. BTW, I edited my post before I realized you (Seretur) already responded

  6. #506
      Jacqui is offline
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    I've rendered my difference clouds and marged it with the blurred mand mask layer above the dirt - you've then said that in the layers dialog, you have to have a wider band of white than black.
    I have a "Layers, Channels, Paths, Palettes, etc." box but where is the dialog?

  7. #507
    Guild Novice Alcairdazar's Avatar
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    RobA, could you please tell me what font you use in your map?

  8. #508
      RobA is offline
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    Quote Originally Posted by Alcairdazar View Post
    RobA, could you please tell me what font you use in your map?
    Chaucer Ultra-Light

    -Rob A>

  9. #509
    Guild Novice Alcairdazar's Avatar
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    Cheers.

    By the way, very nice tutorial. It was very easy and effective and I did it without complication. Also this tutorial introduced me to the world of digital cartography, so thank you very much.

  10. #510
      Notsonoble is offline
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    So I'm bored at work... I have Kubuntu 10.04 running in VBox on my workstation, and I've installed Gimp 2.7.1. I'm currently playing with adjusting this tut to make a swampy battlemap...

    It's going sorta okay, I imagine I'll probably throw up the results and let people shred it... then take a stab at it again.

    As for 2.7.1, so far so good. Single window mode is really nice on a single monitor box, I took a break to post this because Gimp lost access to the Gradient Map script -__-. Other than that an hour and a half of serious work without crashing. Layer Groups is handy... but I noticed if you want to use a layer for bumpmaping or displacing, it needs to be in the layer group your using or not in a group at all.
    My D&D/Roleplaying Blog Making a new effort to update every two weeks!
    Gimp Gradient Basics

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