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
Math and Logic Effects
  • Math and Logic Introduction
  • Clock Limiter
  • Clock Reset
  • Color Add 1+2
  • Color Burn
  • Color Difference
  • Color Dodge
  • Color Exclusion
  • Color Hard Light
  • Color Multiply 1x2
  • Color Overlay
  • Color Restore
  • Color Save
  • Color Screen
  • Color Soft Light
  • Color Subtract 1-2
  • Color Subtract 2-1
  • Special Effects
     
    Artists Gallery
    The Artist Gallery
     
    Pena Support
    Troubleshooting

       

      Previous SectionHide ContentsNext Section


      Effect:Color Subtract 2-1
      Category:Math and Logic
      Speed:Fast

      Description: The Color Subtract 2-1 Effect subtracts Color 1 from Color 2, with or without wrapping.

       
      Options: The Color Subtract 2-1 Effect has the following Options Pane:

      Red 2 - 1:If set to a Red X, the Red Channel is not Subtracted. If set to a Green Check Mark the Red Channel of Color 1 is Subtracted from the Red Channel of Color 2.
      Green 2 - 1:If set to a Red X, the Green Channel is not Subtracted. If set to a Green Check Mark the Green Channel of Color 1 is Subtracted from the Green Channel of Color 2.
      Blue 2 - 1:If set to a Red X, the Blue Channel is not Subtracted. If set to a Green Check Mark the Blue Channel of Color 1 is Subtracted from the Blue Channel of Color 2.
      Alpha 2 - 1:If set to a Red X, the Alpha Channel is not Subtracted. If set to a Green Check Mark the Alpha Channel of Color 1 is Subtracted from the Alpha Channel of Color 2.
      Wrap Values:If set to a Red X, any Channel that goes below 0.0 after the Subtract will be clipped at 0.0. If set to a Green Check Mark any Channel that goes below 0.0 will wrap around. For example, -.5 will become .5.
      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 example shows the Color Subtract 2-1 Effect.

      In this example we combine three Effects. In Slot 1 we have a Texture Effect with our Arches National Park photo loaded. In Slot 2 we have a 2-Color Gradient with default values but Output Color 1 set to Ignore and Output Color 2 set to Replace:

      In Slot 3 we place our Color Subtract 2-1 with default values. This is the result:

      In this next example we again combine three Effects. In Slot 1 we have a Texture Effect with our Arches National Park photo loaded. In Slot 2 we have a 4-Color Gradient with default values but Output Color 1 set to Ignore and Output Color 2 set to Replace:

      In Slot 3 we place our Color Subtract 2-1 with default values. This is the result:

       

      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.