Quick links to procedures on this page:

Expression settings

Corel Painter lets you control brush effects along the stroke based on a number of real-time input factors. For example, many brushes vary their opacity or size in response 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), Thick Paint, Impasto, Liquid Ink, Stroke Jitter, Blending (Saturation and Bleed), Color Expression, and Particles. 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.

Some brush controls such as Size, Opacity, Angle, Stroke Jitter, Color Expression, and Color Variability can also be linked to audio input. For more information, see Audio Expression.

To choose an Expression setting Back to Top

 

Choose None from the Expression list box.
Choose Velocity from the Expression list box. Dragging quickly minimizes the setting; dragging slowly increases it.
Choose Direction from the Expression list box, and move the Direction slider.
Choose Pressure from the Expression list box. Greater pressure increases the setting for that brush feature.
Choose Wheel from the Expression list box. The maximum value is set when the wheel is pushed all the way forward. The minimum is set when the wheel is pushed all the way back.
Choose Tilt from the Expression list box. For example, when the stylus is perpendicular to the tablet, Tilt is set at zero.
Choose Bearing from the Expression list box.
Choose Rotation from the Expression list box.
Choose Source from the Expression list box. Higher luminance (closer to white) increases the setting for that component, producing a wider stroke.
Choose Random from the Expression list box.
Reverse the effect of an Expression setting
Click the Invert button .

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Not all stylus models convey tilt, rotation, or bearing information.


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