
318 Corel Painter X3 Getting Started Guide
to changes in stylus pressure. These responses reflect their default settings. You can use
the Expression settings to vary these effects in response to other factors, such as stroke
direction or velocity.
Expression settings are linked to the following controls: Opacity, Grain, Size, Angle,
Airbrush (Feature and Flow), Impasto, Liquid Ink, Stroke Jitter, Well (Saturation
and Bleed), and Color Expression. In addition, for some of the brush controls that use
Expression, you can adjust the Min setting to specify the range of variation that you
want the expression to apply. The Min setting represents a percentage of the specific
setting, such as Opacity, and it must be linked to an expression to have an effect. For
example, if you choose the Pressure expression on the Opacity panel, set the Opacity
slider to 50%, and then set the Min Opacity slider to 20%, the more stylus pressure
you apply, the more opaque the brushstroke will be.
Direction adjusts the angle value of the direction controller. When the expression is set
to Direction, it specifies the angle at which a brushstroke narrows or widens, which is
particularly useful for calligraphic effects.
To choose an Expression setting
1 Open any of the following brush control panels: Opacity, Grain, Size, Angle,
Airbrush (Feature and Flow), Impasto, Liquid Ink, Stroke Jitter, Well
(Saturation and Bleed), and Color Expression.
2 Perform a task from the following table.
To Do the following
Disable the expression setting Choose None from the Expression list box.
Adjust the brushstroke based on the
dragging speed
Choose Velocity from the Expression list
box. Dragging quickly minimizes the
setting; dragging slowly increases it.
Adjust the selected brushstroke based on the
direction of the stroke
Choose Direction from the Expression list
box, and move the Direction slider.
Adjust the brushstroke based on stylus
pressure
Choose Pressure from the Expression list
box. Greater pressure increases the setting
for that brush feature.
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