Apple Shake 4 - Manual (Page 545)

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Rotoscoping
Shake provides rotoscoping capabilities with the
RotoShape node. When combined with Shake’s other
image processing, layering, and tracking functions, you
have a powerful rotoscoping environment.
Options to Customize Shape Drawing
Before you start working with Shake’s RotoShape node, you should be aware that there
are several parameters in the guiControls section of the Globals tab that allow you to
customize shape-drawing behaviors and shape-transform controls in the Viewer. You
can change these parameters to make it easier to use Shake’s controls for your
individual needs.
rotoAutoControlScale
An option which, when enabled, increases the size of the transform controls of shapes
based on the vertical resolution of the image to which the shape is assigned. This
makes it easier to manipulate a shape’s transform control even when the image is
scaled down by a large ratio.
rotoControlScale
A slider that allows you to change the default size of all transform controls in the
Viewer when rotoAutoControlScale is turned on.