Apple Shake 4 - Manual (Page 882)

882 Chapter 28 Filters
invert
Inverts the controlChannel.
IDilateErode
The IDilateErode node isolates each channel and cuts or adds pixels to the edge of that
channel. For example, to chew into your mask, set your channels to “a,” and then set
the xPixels and yPixels values to -1. By default, you work on whole pixels. To switch to
subpixel chewing, enable “soften.” Note that the soften parameter really slows the
node. If you use the soften feature, use low values for xPixels and yPixels.
Parameters
This node displays the following controls in the Parameters tab:
channels
Lets you set which channels Shake should blur. You can choose one or all of the red,
green, blue, or alpha channels. The default is “rgba.”
xPixels, yPixels
The number of pixels added or taken from an edge. Positive values add to the edge;
negative values eat away at the edge.
borders
This parameter determines whether Shake considers or ignores the border pixels at the
edge of the image.
soften
This parameter lets you turn softening on or off, or affects the subpixel. If enabled, this
node becomes considerably more processor-intensive with high xPixel and yPixel
values.
sharpness
The sharpness factor for the softening. A value of 0 gives a smooth gradation, whereas
2 gives you a sharp cutoff.
steps
The amount of steps. The intensity of the control image is divided up X amount of
zones, with X equal to steps.
stepBlend
Controls the blending between the amount of regions (see below). If you set this
parameter to 0, each step has a constant value. If the setting is 1, there is a continuous
blend between the different regions.