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
Color Filter Effects
Spatial Filter Effects
  • Color Filter Introduction
  • Airbrush
  • RGBA Discard
  • RGBA Replace
  • Selective Discard
  • Selective Replace
  • Star Template
  • Stipple
  • Texture Displace
  • XY Ripple
  • XY Rotate
  • XY Twist
  • Math and Logic Effects
    Special Effects
     
    Artists Gallery
    The Artist Gallery
     
    Pena Support
    Troubleshooting

       

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      Effect:Airbrush
      Category:Spatial Filters
      Speed:Fast

      Description: The Airbrush Effect is extremely important in Pena as it converts your current drawing brush into a soft-edged Airbrush.

      There are many uses for the Airbrush Effect, but probably the most useful function is to apply the Airbrush to the Alpha channel. This is what Airbrush defaults to with its basic settings.

      IMPORTANT: Note that for Airbrush to work as you would expect (especially Alpha Airbrush) the Depth Control on the Control Pane should be set to OFF:

      ...that is, no yellow glow around it. If it is turned ON, you will find that Airbrush painting paints into depth and does not get you the effect you were most likely expecting.

      The Airbrush Effect is a soft-edged ball, centered on your brush. Your brushes size sets the basic size for the Airbrush, but can be modified within the Airbrush Effect itself.

       
      Options: The Airbrush Effect has the following Options Pane:

      Use Color 2:If set to a Red X the color for the Airbrush comes from Color 1. When set to a Green Check Mark the color for the Airbrush comes from Color 2.
      Airbrush Red:If set to a Red X then any Output Color Red Channel remains unaffected. If set to a Green Check Mark then any Output Color Red Channel will be replaced with the Airbrush value for that position.
      Airbrush Green:If set to a Red X then any Output Color Green Channel remains unaffected. If set to a Green Check Mark then any Output Color Green Channel will be replaced with the Airbrush value for that position.
      Airbrush Blue:If set to a Red X then any Output Color Blue Channel remains unaffected. If set to a Green Check Mark then any Output Color Blue Channel will be replaced with the Airbrush value for that position.
      Airbrush Alpha:If set to a Red X then any Output Color Alpha Channel remains unaffected. If set to a Green Check Mark then any Output Color Alpha Channel will be replaced with the Airbrush value for that position. Airbrushing in the Alpha only is the most common use of the Airbrush Effect.
      Size Adjustment:The Size Adjustment value lets you fine-tune the Airbrush size in relation to your Brush Size. Airbrush automatically uses the current Brush Size to determine the size of the Airbrush. Using the Size Adjustment value lets you increase or decrease the Airbrush size relative to your current brush.
      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: In the first image we are using two Effects. Slot 1 contains a 4-Color Gradient with Fit To Brush turned on. Slot 2 contains our Airbrush with the default values.

      We first draw on the left side just using the 4-Color Gradient Effect (Airbrush is turned off). We then draw in the right side with Airbrush turned on. You can see how the Airbrush has a softer edge.

      This second image is similar to the previous with the exception that Slot 1 has our Arches National Park photo loaded as a Texture with default values. Slot 2 contains our Airbrush with the default values. Again, the drawing on the left is the Texture only, Airbrush turned off. And on the right, with Airbrush turned on. You can see the hard edge on the left versus the soft edge on the right:

       

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    pena © 2014 by David Cook
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