Apple Shake 4 - Manual (Page 572)

572 Chapter 20 Rotoscoping
Using the QuickShape Node
The QuickShape node is an image generator to be used for animated garbage mattes. It
is ideal for plugging into the Mask input of a node, or is used in conjunction with
nodes such as Inside, Outside, or KeyMix.
Note: The QuickShape node is an older node to create rotoshapes. The more flexible
(and faster) RotoShape node is recommended. This node is maintained for compatibility
purposes. The one advantage QuickShape has over RotoShape is its ability to propagate
keyframe changes to other keyframes before or after the current frame.
Since these nodes create images like any node, you can modify the images with other
nodes such as Blur or DilateErode.
You can enable motion blur for an animated QuickShape. Unfortunately, the shape does
not use Shake’s normal high-quality motion blur. It instead draws and renders several
versions of the entire shape, so temporal aliasing occurs with extreme motion.
Creating QuickShapes
When you create a QuickShape node and Display Onscreen Controls is enabled for the
Viewer, you can immediately add points to the shape.
Button Usage Example
Start in Build mode. In Build mode, each
time you click a blank spot, you append a
new point between the last point and the
first point. Click the points, or, if you hold
down the mouse button, you can drag the
new point around. You can also go back and
change any key or tangent, or insert a point
by clicking a segment.
Once you are finished with the rough shape,
switch to Edit mode (click the Build/Edit
Mode button). When you click a blank spot,
you do not append a new point; instead, you
can drag to select several points and move
them as a group. This also fills in the shape.