Page 1 of 2 12 LastLast
Results 1 to 10 of 13

Thread: Fast&easy quasi-fractal lines in Photoshop?

  1. #1
      Blacky is offline
    Guild Apprentice Blacky's Avatar
    Join Date
    Mar 2009
    Location
    Provence, France
    Posts
    26

    Help Fast&easy quasi-fractal lines in Photoshop?

    I'm looking to draw things like natural cave walls and such, with a mouse, but with a quasi low fractal effect between mouse points. i.e. the ability to draw something like this:
    Fast&easy quasi-fractal lines in Photoshop?-carto.png
    without spending a huge amount of time (and yet controlling the general shape of it, no purely random generator that I do know how).

    I'm sure it should be fast and easy, and I'm pretty sure I saw that somewhere, but can't find it now nor can I find the right wording to do a meaningful Google search.

    Any ideas?

  2. #2
      madcowchef is offline
    Guild Artisan madcowchef's Avatar
    Join Date
    Feb 2012
    Location
    Pacific Northwest USA
    Posts
    607

    Default

    A popular way of going about drawing continents is to do fractal clouds and a threshold layer above it for the purely random look, just adding another, mostly clear, layer above this to draw black and white onto. This will allow you to lay it out yourself or alternately you can just add noise to your initial drawing and then use the threshold adjustment layer to get what you are looking for but I find this not messy enough for me most times. It you aren't familiar with either of those techniques I can point you to one of the tutorials that outline them. Hope that helps.

  3. #3
      Blacky is offline
    Guild Apprentice Blacky's Avatar
    Join Date
    Mar 2009
    Location
    Provence, France
    Posts
    26

    Default

    Thanks but that's not it. Thresholded clouds are what I used in the image above, I know how to do something purely random like that.

    What I would like is to be able to draw lines&curves with the mouse then somewhat “randomize” this drawing, or to place a few point and then fractalize or randomize the drawing between those points. Something akin to the zigzag or the roughen filters in Illustrator (only, better).

    Imagine a tactical underground map, where I need to dig several natural-ish tunnels; for example.
    Last edited by Blacky; 02-19-2014 at 02:50 PM.

  4. #4
      madcowchef is offline
    Guild Artisan madcowchef's Avatar
    Join Date
    Feb 2012
    Location
    Pacific Northwest USA
    Posts
    607

    Default

    I'm saying you can use a layer over the fractal layer to draw in your tunnels as simple white lines then use the cloud to act as a randomizer for the edges by adjusting thresholds and transparency. Once you get the balace of fractal/whitelayer/threshhold any line you draw will appear with highly natural edges.

  5. #5
      madcowchef is offline
    Guild Artisan madcowchef's Avatar
    Join Date
    Feb 2012
    Location
    Pacific Northwest USA
    Posts
    607

    Default

    Here's an example:
    Fast&easy quasi-fractal lines in Photoshop?-threshcave.jpg
    There's the end result
    Fast&easy quasi-fractal lines in Photoshop?-threshcave2.jpg
    there's what I drew

    All of it took only a couple of minutes and didn't lead too to much mess, but that depends on how quickly you nail the balance (mine is simple 50% on both the fractal and the drawn layer over a black).

  6. #6
      Blacky is offline
    Guild Apprentice Blacky's Avatar
    Join Date
    Mar 2009
    Location
    Provence, France
    Posts
    26

    Default

    Ahhhh… Ok!

    I understand the theory, seems like a good idea, but I just did a few tests and it seems there's always an issue with the clouds not being precise enough or just at odds with my lines to fully integrate once thresholded.

    Do you have an example? Maybe I'm missing something (well, probably ).

    Edit: too slow Blacky, too slow

    Edit2: gosh, I really need to buy a new brain an eBay. This seems like a very good process, but for the life of me, can't reproduce it. Could you send me the psd you made?
    Last edited by Blacky; 02-19-2014 at 03:14 PM.

  7. #7
      madcowchef is offline
    Guild Artisan madcowchef's Avatar
    Join Date
    Feb 2012
    Location
    Pacific Northwest USA
    Posts
    607

    Default

    If you have too much mess, just draw over in black on the same layer with the white to get rid of the messy parts, the joy of it is its super quick and requires almost no precision.

  8. #8
      Blacky is offline
    Guild Apprentice Blacky's Avatar
    Join Date
    Mar 2009
    Location
    Provence, France
    Posts
    26

    Default

    Yup, still stuck. If you have your psd around I'll appreciate it, and as offered if you know about a few detailed tutorial URLs.

    I'm sure I'm missing one stupid step somewhere.

  9. #9
      madcowchef is offline
    Guild Artisan madcowchef's Avatar
    Join Date
    Feb 2012
    Location
    Pacific Northwest USA
    Posts
    607

    Default

    Fast&easy quasi-fractal lines in Photoshop?-threshcave.psd

    Hope that helps, I'd begun cleaning up a couple of the stray white sections. Oh and the top layer is just a copy of all the layers merged. Don't know why I even made it, force of habit I guess.
    Last edited by madcowchef; 02-19-2014 at 03:39 PM.

  10. #10
      waldronate is offline
    Software Dev/Rep Gracious Donor waldronate's Avatar
    Join Date
    Mar 2007
    Location
    The High Desert
    Posts
    1,668

Page 1 of 2 12 LastLast

Posting Permissions

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