Matrox Electronic Systems Matrox RT.X2 - Manual (Page 111)

103
Creating a garbage matte effect
Creating a garbage matte effect
The Matrox 4-point, 8-point, and 16-point garbage matte effects let you use
individual control points to determine the shape of a garbage matte applied to a
clip to superimpose it onto another clip. You can use these effects to create a
garbage matte for cropping unwanted objects from a foreground image in a
chroma or luma key effect. For example, by applying a garbage matte to your key
foreground image, you can drag up to 16 control points to crop specific areas of
your clip and show only your underlying image outside the matte.
° To set up a Matrox garbage matte effect:
Click the triangle next to Matrox Garbage Matte - 4 Points , Matrox Garbage
Matte - 8 Points , or Matrox Garbage Matte - 16 Points to expand the
property list:
• Matte Settings The particular control points available depend on the type
of garbage matte effect that you applied (4-, 8- or 16-point). Use the
provided control points to adjust the shape of your garbage matte. The values
represent the horizontal and vertical positions of each control point.
¥ Tip You can easily position each control point directly in the Program
Monitor. To do this, click the Transform icon ( ) beside the effect name
in the Effect Controls panel. A cursor will appear at each control point in
the Program Monitor. Drag these cursors to adjust the shape of your garbage
matte.
$
Matte Opacity Use this to set the opacity of your garbage matte. Levels
range from completely transparent (0) to opaque (100).