Grass Valley Zodiak v.6.0 Mar 15 2006 - Manual (Page 63)

Zodiak — User Manual 63
Keying
When the shaping is configured properly (using either shaped or
unshaped key fill) the desired output is the result (
Figure 26 ).
Figure 26. Correctly Shaped DPM Key Example
When the DPM provides a shaped video output but the key is processed as
though it were unshaped, the shaped video does not completely fill the key
hole in the background so a dark halo appears around the key (
Figure 27 ).
Figure 27. Incorrect Key with Dark Halo