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Setting Random Controls
Corel Painter uses randomness to introduce an "accidental" quality in color and stroke. Randomness contributes to the appealing, unique look of artwork created in Corel Painter. You can control brush randomness with settings in the Random area of the Stroke Designer page.
Jitter
The Jitter control introduces a randomized jitter to the brush stroke. Instead of appearing directly along the stroke, dabs appear randomly outside the brush stroke path.
The Jitter slider creates a randomized jitter in the brush stroke. Top=0, bottom=3.13.
To set Jitter
- On the Stroke Designer page of the Brush Creator, click Random.
- Move the Jitter slider to the left to decrease deviation from the stroke path. Move it right to increase deviation from the stroke path.
Clone Location Variability
Both Clone Location sliders work with brushes of the Cloning method. The Variability control lets you randomly offset the location where the clone brush samples the source.
When Variability is zero, the pixels of the source and destination images correspond precisely-using a cover brush at full Opacity (and no Grain) simply re-creates the source image.
The Variability slider controls the offset of the clone based on the location of the source image.Top=0, bottom=12.
Introducing a degree of randomness disturbs the pixel-to-pixel correspondence. The resultant variations in the image distance the clone from its photographic source, which can contribute to a Natural-Media appearance.
To set clone location variability
- On the Stroke Designer page of the Brush Creator, click Random.
- Move the Clone Location Variability slider to the right to increase the range (distance) the sample can be offset. Move it left to limit offset, causing source and destination images to correspond more precisely.
- Clone location sliders do not have an effect when Clone Color is checked in the Colors palette. They have an effect only when a Clone method is in use.
How Often
The How Often slider controls the period between random offsets.
To set the period between random offsets
- On the Stroke Designer page of the Brush Creator, click Random.
- Move the slider to the left to cause a greater number of samples to be offset.
This gives the clone image a rough, distorted look.
- Move the How Often slider right to increase the period, causing samples to be offset less frequently.
The How Often slider controls the period between random offsets. Top=0, bottom=15.
Random Brush Stroke Grain
Normally, when you make a brush stroke, the paper grain is fixed. Strokes repeated over an area will bring out the same grain.
The Random Brush Stroke Grain option randomly moves the paper grain for each dab of each stroke.
The Random Brush Stroke Grain option randomly moves the paper grain for each stroke. Top=disabled, bottom=enabled.
To choose the Random Brush Stroke Grain option
- On the Stroke Designer page of the Brush Creator, click Random.
- Enable the Random Brush Stroke Grain check box.
Random Clone Source
Random Clone Source randomly samples the source document, then places strokes on the clone destination. There's no correspondence between the samples taken from the source and where they are placed on the clone. The result is a random pattern of the predominant colors and edges of the source. The brush and stroke determine the nature of the pattern.
You might use Random Clone Source with a faint, stipple brush to add noise to an image. In this case, the clone source image merely contains the "noise" colors you wish to add.
The Random Clone Source option randomly samples the source document. Top=disabled, Bottom=enabled.
To choose the Random Clone Source option
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