Apple Motion 2 - Manual (Page 764)

764 Chapter 10 Using Filters
Tweaking the Noise Removal parameter can help for blue or greenscreens that have
some variance in their color value. Additionally, the darker areas of your object can fool
the keyer’s defaults, so in order to get a clean matte you may have to adjust Matte
Density so the background doesn’t show through these dark areas. Lastly, Spill
Suppression can be used to reduce bluescreen reflections or interactions with the
foreground object.
5 Turn on the background layer.
Spill Suppressor
Whenever you key an image that was shot against a blue or greenscreen, there’s a
good chance that some color reflected off of the screen and illuminated the edge of
the foreground subject. This fringing around the edge of the subject is called spill, and
is usually difficult to eliminate because it’s actually part of the subject you’re trying to
preserve. The Spill Suppressor filter deals with this by tinting the keyed color in order to
turn it into a neutral tone.
Note: The Spill Suppressor may inadvertently tint other areas of the foreground subject
in addition to the colored fringe, so adjust its settings with care.
Parameters in the Inspector
Spill Type: Sets the type of spill to be suppressed. Select Blue or Green.
Amount: Sets the amount of spill to be suppressed. Values range from 0 to1.
Dashboard controls
The Dashboard contains the same controls as the Inspector.
01112.book Page 764 Sunday, March 13, 2005 10:36 PM