Apple Shake 4 - Manual (Page 689)

Chapter 24 Keying 689
Using Color Replace—Method One
This technique is nice because it is fast, but often simply replaces blue spill with a
different color. In the following tree, a ColorReplace node is applied to the foreground,
and replaces the blue with the color of the wall. As always, increase the satFalloff to a
value near1. The head looks great, but spill remains on the shirt, and there is now a
yellow edge around the skirt.
To correct this, drop the ColorReplace valRange to 0 and the valFalloff to approximately
.4. Add a second ColorReplace node to eliminate the blue spill on the shirt. Carefully
select the blue on the shirt, and then replace it with a beige-white color. Also, move all
Range parameters to 0 and all Falloff parameters to approximately .3. The shirt looks
good, but there is still a yellow ring around her skirt.