pena © 2014 by David Cook
The Noise Effect creates controlled noise.|
Pena offers several mechanisms to generate Noise. The Texture Pane has the ability to place monochrome or color noise into any of the five Texture Slots.
The Noise Effect gives you another method to generate Noise.
The Noise Effect is a pseudo-noise generator. That is, it uses a combination of algorithmic patterns, zoom, and a repetition control to generate a pattern. The resulting pattern can be regular, such as a grid of dots, of irregular, such as snow on a TV.
The Incoming Color 1 is used for the bright part of the Noise and Incoming Color 2 is used for the dark part of the Noise.
The Noise Effect has a lot of controls and can produce an extreme number of different looks. The best way to learn this Effect is to try a variety of settings to understand how they work with each other.
If you enable the Fit To Brush Option you will paint with the Noise Effect sized to your brush.
The Noise Effect has the following Options Pane:|
|Regularity:||This value works with the three Pattern Controls to determine the look of the Noise. If Regularity is a value nearer to zero then the pattern is very regular (repeats). Low numbers will generate curves, dots, and other regular shapes, depending on the settings of the three Pattern Controls. Larger Regularity values make the pattern increasingly irregular and more noisy.|
|Pattern Control 1:|
Pattern Control 2:
Pattern Control 3:
|The Noise Effect uses three algorithmic patterns in combination with Regularity to produce the final result. The values for the three Pattern Controls set the frequency of each Pattern. If all three values are the same, the result will be very un-noise like. Using different values for each Pattern will give you more noise like results.|
|X Magnification:||This value sets the zoom level in the X (horizontal) direction. Values nearer to zero are larger magnifications. Large values zoom out to smaller magnifications.|
|Y Magnification:||This value sets the zoom level in the Y (vertical) direction. Values nearer to zero are larger magnifications. Large values zoom out to smaller magnifications.|
|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.|
The following image shows the Noise Effect with its default settings and Color 1 set to white and Color 2 set to black:|
Next we set the three Patterns to 1 and the Regularity very low (very regular):
Here are the original defaults with Regularity turned much higher (very irregular):
Next we play with the X and Y Magnification. Setting X small and Y high lets us stretch the noise:
And finally, default values with an extremely low Zoom (high Magnification value) gives us maximum random noise:
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