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Detailed Description of Classic Effect Editors
Key Types
Avid Liquid offers five different types of keys.
 Luminance Key - Used for keying areas with a certain brightness (i.e. affects
the luminance signal).
 Chroma Key - Allows certain colors or color ranges to be keyed.
 Blue Screen Key - Used for keying a defined blue for creating the blue-screen
effect.
 Green Screen Key - Used for keying a defined green (page 589).
 RGB Difference Key - Used for keying specifically defined monochrome color areas. This is pri-
marily used for graphics.
 None - Deactivates all keys. However, with this function clip transparency or a mask can be
defined.
Key Mask
For all the key types, the Key Mask lets you select image areas that should be keyed or excluded from the
key function. If no Mask is defined, the key function is applied to the entire image. Options:
 Mask shape -
Lasso (Free Form).
 If you want to define several areas, press and hold the SHIFT key. A plus (+) sign appears next to
the mouse pointer.
 If you press and hold the ALT key, a minus (-) sign appears next to the mouse pointer. In this case
you can cut out one or more additional areas within an area.
 If you press and hold the ALT and SHIFT keys, you can select the overlap area of intersecting Mask
areas.
Invert
Activate this to reverse the Key Mask function. Now the selected area is excluded from the key function
and everything else around it is added to the key.
Softness
Here you set a soft transition at the edges of the Key Mask.