
Adjusting brushes with brush controls 387
For example, you can link Resat to the Pressure expression and link Bleed to the
Velocity expression.
You can also adjust the Min setting to specify the range of variability that you want each
expression to apply. The Min Resat and Min Bleed settings represent a percentage of
the Resat and Bleed settings and they must be linked to an expression to have an effect.
For example, if you link the Pressure expression to the Resat control, set the Resat
slider to 40% and set the Min Resat slider to 50%, the amount of resaturation will vary
from 20% to 40% every time you apply pressure with the stylus.
Brush Loading affects how dab-based brushes interact with underlying pixels and
works in conjunction with Resat and Bleed. When Brush Loading is active, brushes
can pick up existing colors, hair by hair. This capability offers truer color interaction,
astounding color-variations, smearing, and better cloning results. For more information
about dab-based brushes, see “General controls: Dab types” on page 322.
When Brush Loading is not active, brushes interact with previously applied colors by
sampling underlying pixels and then loading the brush with one new color — the
average of those colors that were sampled. When you use Brush Loading, it’s best to
use a very low setting for spacing. For more information, see “Spacing controls” on
page 346.
The Dryout control determines how quickly a brush runs out of medium. Dryout is
measured in pixels. Moving the slider to the left causes a brush’s reservoir to empty
more quickly. This can produce brushstrokes that fade out gently. If Dryout is set high,
the brush never runs out of color.
Dryout works in conjunction with Bleed, so Bleed must be set above zero if you want
to take advantage of Dryout. You can modulate the Dryout effect by changing the
Bleed setting.
Brushstrokes with Dryout set to 724 (left) and 22026 (right)
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