Corel Painter X3 Win/Mac, EDU, EN User's Guide Page 150

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Painting 127
Now, airbrushes respond to angle (tilt), bearing (direction), and flow (fingerwheel
setting) data from a stylus, allowing for a truly realistic brushstroke. For example, as
you tilt your stylus, specks of media land on the paper in a way that reflects that tilt.
Imagine, again, the circle of light thrown by a flashlight. The moment the flashlight is
no longer perpendicular to the paper, the shape of the cone of light changes, creating a
conic section. In the same manner, Corel Painter airbrushes create conic sections that
mirror your stylus movements.
Angle and tilt determine the shape and size of the conic section created by
Corel Painter airbrushes, which resembles a circle of light from a flashlight
that is no longer perpendicular to the paper.
Extreme-tilt angles affect large areas of the canvas. This can slow the brush down as it
tries to squirt paint too far from the stylus.
Adjusting spread
You can adjust airbrush spread, which affects how paint spreads out as it is applied. In
other words, it sets the size of area where the paint will be applied.
A good range for the Spread setting is 30° to 40°. Narrow settings for Spread and
Angle can cause problems. Combined with a very tilted stylus, a narrow setting for
Spread can cause paint to be deposited away from the cursor.
Varying edges
You can vary the edges of the paint sprayed from an airbrush to achieve desired softness
by selecting a brush tip profile. Each profile gives you a different edge to the paint you
spray. For more information, refer to “Changing dab profiles” on page 348.
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