5.5

823Motion User Guide
• Brush Angle Randomness: A dial that defines an amount of variance in the rotation of
the stroke dabs. A value of 0 results in no variance—all dabs have the same rotational
value. A value greater than 0 introduces a variance. The angle for an individual dab is
defined by the Brush Angle and Angle Over Stroke parameters, plus or minus a random
value falling within the Brush Angle Randomness. Using the default dial modifies the Z
angle. To modify the rotation of the dabs in X, Y, and Z space, or to access the Animate
parameter (available when the Local 3D checkbox is selected), click the disclosure
triangle.
• Animate: A pop-up menu (available when the Local 3D checkbox—described below—
is selected) that lets you change the interpolation for animated 3D rotation channels.
Click the Brush Angle Randomness disclosure triangle to display the Animate
parameter.
• Use Rotation: Dabs rotate from their start rotation to their final rotation.
Depending on the animation, the elements may rotate multiple times before
reaching their final orientation (the last keyframed value). For example, if the X, Y,
and Z Angle parameters are animated from 0 degrees to 180 degrees in a project,
the elements rotate on all axes before reaching their final orientation.
• Use Orientation: Dabs rotate more smoothly and without multiple rotations. This
option interpolates between the dabs’ start orientation (first keyframe) and their
end orientation (second keyframe).
• Local 3D: A checkbox that lets you take advantage of the Motion 3D workspace. When
the Local 3D checkbox is selected, the following become possible:
• When the Face Camera checkbox (described below) is selected, paint dabs actively
face the camera when the camera or stroke is rotated or animated.
• When the Dab Depth Ordered checkbox (described below) is deselected, dab
ordering remains consistent when the paint stroke (or the camera) is rotated in X or
Y space. When this checkbox is selected, the dabs jump in front of each other each
time the stroke rotates 180 degrees. In other words, this checkbox draws the dabs
in the stroke according to each dab’s actual 3D position in the project. Dabs that are
closer to the camera appear closer; dabs that are farther from the camera appear
more distant.
• When the Dynamics checkbox is selected in the Advanced pane, a paint stroke acts
similarly to an emitter—the dabs become particles. When the Local 3D checkbox
is selected, the dabs are animated in 3D space. When the Local 3D checkbox is
deselected, the particles are animated in X and Y space only. For more information
on Dynamics, see Advanced pane controls in Motion.
• When the Dynamics checkbox is selected in the Advanced pane, some applied
Simulation behaviors will pull dabs out of their plane. For example, if a paint stroke
has an applied Attracted To behavior (with the Affect Subobjects checkbox selected),
and the target layer is in a different location in Z space, the dabs are pulled into Z
space and move toward the target layer. The paint stroke must be a member of a 3D
group for a behavior to pull dabs out of the X and Y planes. For information about 3D
groups, see Create 3D intersection in Motion.
Use the following guidelines when working in 3D with paint strokes:
• Even in a 2D project, you can adjust a paint stroke’s general properties in 3D space.
For example, you can modify the Z parameter (depth) using the Position, Scale,
Rotation, and Anchor Point controls in the Properties Inspector.