Pena Contents
Introduction
Control Pane
Brush Pane
Texture Pane
Effects Pane
Color Picker
Save/Load Pane
Selection Pane
Preferences Pane
Intelligent Canvas
Wacom Bluetooth Stylus
Jot Bluetooth Stylus
 
The Effects Library
Effects Introduction
Color Source Effects
Procedural Source Effects
  • Procedural Source Introduction
  • 2-Color Gradient
  • 3-Color Gradient
  • 4-Color Gradient
  • Brick Wall
  • Clouds, Marble, Granite
  • Colorful Curves
  • Cracked Earth/Clay
  • Fiery Inferno
  • Fractal, Julia
  • Fractal, Mandelbrot
  • Fractal, Newton
  • Honeycomb
  • Interlocking Rings
  • Lattice
  • Leopard Fur
  • Liquid Metal
  • Metallic Cage
  • Neural Network
  • Noise
  • Polkadots
  • Rings and Rings in Rings
  • Screen Door
  • Simple Smoke
  • Sky with Clouds
  • Soap Film
  • Stage Light
  • Stripes, Horizontal
  • Stripes, Vertical
  • Textured Cone
  • Textured Wall
  • Warped Rings
  • Water Refraction
  • Wonderful Wood
  • Zebra Stripes
  • Color Filter Effects
    Spatial Filter Effects
    Math and Logic Effects
    Special Effects
     
    Artists Gallery
    The Artist Gallery
     
    Pena Support
    Troubleshooting

       

      Previous SectionHide ContentsNext Section


      Effect:Fractal, Julia
      Category:Procedural Sources
      Speed:Medium

      Description: The Fractal Julia Effect lets you create fractal patterns based on the Julia Set function. Fractals are self-repetitive surfaces. The Julia Set is a particularly chaotic version where small changes to any parameter can generate hugely different patterns.

      Fractal Julia uses the incoming Color 1 and Color 2 to create the Effect. The external area of the Effect (non-julia area) is drawn in Color 1, and the Julia Fractal part of the Effect is drawn in Color 2.

      If you enable the Fit To Brush Option you will paint with the Fractal Julia Effect sized to your brush.

       
      Options: The Fractal Julia Effect has the following Options Pane:

      Scale:This value controls how zoomed in or out of the fractal surface.
      Complexity:The Complexity value sets the amount of detail that is imparted to the fractal edges. Since fractals are self-replicating this controls how detailed that process is. Note that of any of the values, setting this to high numbers will significantly slow down painting.
      X Center:This controls where on the fractal surface the X Center of the Canvas is. This should not be conofused with moving the Effect about the canvas, but rather, where in the Julia Fractal Set is being rendered. Modifying this value, and the Y Center value can drastically change the pattern generated.
      Y Center:This controls where on the fractal surface the Y Center of the Canvas is. This should not be confused with moving the Effect about the canvas, but rather, where in the Julia Fractal Set is being rendered. Modifying this value, and the X Center value can drastically change the pattern generated.
      Color Span:This controls the amount of colors that are generated between Color 1 and Color 2 while creating the Effect. The lower the value, the less colors are generated.
      Fit To Brush:If set to a Red X the Effect spans the screen such that as you paint you reveal the Effect. When set to a Green Check Mark the Effect is sized to the brush such that as you paint the entire Effect is within the brush itself.
      Output Color 1:By default this is set to REPLACE which means that the set color will be output to Color 1. You can change this as explained in Options Pane Color Mixers.
      Output Color 2:By default this is set to IGNORE which means that the Color 2 will be ignored (the original Color 2 will be kept). You can change this as explained in Options Pane Color Mixers.

      Example: The following image shows the Fractal Julia with its default settings. Color 1 is White and Color 2 is Black:

      In this next image, we use three Effects together. Remember that Fractal Julia uses Color 1 and Color 2. In Slot 1 we placed the 4-Color Gradient. In Slot 2 we placed the 3-Color Gradient, set it to Horizontal, set Output Color 1 to Ignore, and Output Color 2 to Replace. In Slot 3 we placed our Fractal Julia effect:

      The following image shows the Fractal Julia with its default settings but Y Center set to 0.64. Color 1 is White and Color 2 is Black. You can see how just changing that one value a little bit caused a huge difference in the pattern created:

       

      Previous SectionHide ContentsNext Section

    pena © 2014 by David Cook
    Apple®, the Apple logo, iPad, iPad Air, iPad Mini, iPod, iPhone, and iTunes
    are trademarks of Apple Inc., registered in the U.S. and other countries.
    Wacom®, and Wacom Intuos Creative Stylus are trademarks of Wacom, registered in the U.S and other countries.