Apple Shake 4 - Manual (Page 704)

704 Chapter 24 Keying
satSharpness
Describes the falloff curve from satRange to satFalloff.
• 0 = linear drop-off
• 1 = smooth drop-off
valRange
Plus and minus from the value specified by the HSVColor parameter.
valFalloff
Describes the falloff range from valRange that is picked, with the values ramping down.
valSharpness
Describes the falloff curve from valRange to valFalloff.
• 0 = linear drop-off
• 1 = smooth drop-off
matteMult
Toggle to premultiply the RGB channels by the pulled mask.
• 0 = no premultiply
• 1 = premultiply
arithmetic
This parameter lets you define how the mask is created by the key.
• 0 = replace existing mask
• 1 = add to existing mask
• 2 = subtract from existing mask
DepthKey
The DepthKey node creates a key in the alpha channel based on depth (Z) values.
Values below loVal are set to 0, and values above hiVal are set to 1. Values in between
are ramped. You also have roll-off control, plus a matteMult toggle. If there is no Z
channel in your image, this node does not work.
If the Z channel is not directly imported with the FileIn node, you can copy it over with
the Copy command, using z as your channel.
Note: When you import from Maya, there is a strange -1/distance Z setting. This
basically means that the numbers in DepthKey are impractical. To correct this, go to
www.highend2d.com and download the MayaDepthKey macro. The macro operates
exactly like the normal DepthKey, but does the conversion math for you.
Parameters
This node displays the following controls in the Parameters tab:
loVal
Any pixel below this value (as calculated per its depth) turns black.