Apple Motion 3 User Manual
Page 1054
1054
Chapter 12
Using Shapes and Masks
Brush Scale: A slider and value field that allow you to change the size of the brush (the
source of the dabs). Click the disclosure triangle to adjust the X and Y scale values
independently. By default, Scale is set to 100%—the size of the dabs is equal to the size
of the source brush.
Brush Scale Randomness: Defines an amount of variance in the scale of the stroke’s
brush. A value of 0 results in no variance—all dabs in the stroke are the same size. A
value greater than 0 introduces a variance. The scale for an individual dab is defined by
the Scale parameter, plus or minus a random value falling within the Brush Scale, Width
Over Stroke, and Width (in the Style pane) parameters. Click the disclosure triangle to
adjust the X and Y values independently.
Align Brush Angle: When this checkbox is selected, the stroke dabs automatically
rotate to match the shape on which they are positioned.
Brush Angle: Specifies (in degrees) the rotation of the stroke dabs. Using the default
dial or value slider (when the disclosure triangle is closed), the Z angle is affected. To
individually modify the rotation of the pattern elements in X, Y, and Z space, click the
disclosure triangle.
 Animate: This pop-up menu allows you to change the interpolation for animated 3D
rotation channels. By default, Animate is set to Use Rotation. For more information
about the Animate parameter, see “
Parameters in the Properties Tab
Angle Over Stroke: This mini-curve editor allows you to customize the Z rotation (in
degrees) of the dabs over the length of the stroke. You can create a curve that
gradually increases the dabs’ angle over the length of the stroke, a curve that varies the
dabs’ angle over the length of the stroke, and so on. Select or add a keyframe in the
graph to make changes to the Angle Over Stroke and Stroke Length parameters.
 Angle Over Stroke: Use the dial or value slider to change the value of the selected
keyframe.