Additional Parameters When Brush Source Is a QuickTime Movie or
Image Sequence
A collection of additional settings appear when the Brush Source is set to a multi-frame
object such as a QuickTime movie or Image sequence.
Play Frames:
A checkbox that controls playback. If the checkbox is selected, it loops the
playback of the animation or movie clip. If it’s deselected, the paint dabs use the still
frame specified by the Random Start Frame parameter or the Source Start Frame
parameter.
Random Start Frame:
A checkbox that introduces variation to image brush strokes using
multi-frame source objects. If the checkbox is selected, each dab will pull from a random
frame in the source. The dab will start animating from this random frame or remain still,
depending on whether the Play Frames checkbox is selected or deselected. This pattern
of randomness can be adjusted by using the Random Seed button under the Stroke pane.
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Source Start Frame:
Click the Source Start Frame disclosure triangle to display a mini-curve
editor that allows you to define the frame where playback of the source clip begins in
the paint dabs. The Source Start Frame default keyframe value is 0. You can change the
start frame for all dabs, or you can create a curve so start frames vary over the length of
the stroke (different dabs use different start frames). For example, if the first Source Start
Frame value is 50, each dab begins playback at frame 50. If you create an animation curve
that begins at 50 and ends at 250, each dab begins clip playback at a progressively later
frame.
The Play Frames checkbox must be selected for playback to occur. If Play Frames is
deselected, you can display different still frames over the length of the stroke. This
parameter only appears if Random Start Frame is deselected.
Note: For information on using the mini-curve editor, see
Mini-Curve Editor
.
When you click the Source Start Frame disclosure triangle, the Stroke Length and Source
Start Frame parameters become available.
• Source Start Frame Over Stoke: Use the sliders or enter a number into the value field to
change the value of the selected keyframe in the mini-curve editor.
• Stroke Length: Stroke Length is mapped horizontally on the mini-curve editor graph
and provides a visual representation of the position of the changes in start frame value
(keyframes) over the length of the stroke. Use the sliders or enter a number into the
value field to change the value of the selected keyframe.
Hold Frames:
Sets the number of times each frame of the source movie is repeated
during playback. The larger the Hold Frames value, the slower your playback.
Hold Frames Randomness:
Varies the number of frames to “hold.”
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