Apple Shake 4 - Manual (Page 814)

814 Chapter 27 Warping and Morphing Images
overSampling
An integer value that represents the numbers of samples per pixel that are taken into
account when performing a warp. This parameter is set to 1 by default, which results in
faster rendering times. However, extreme warping effects may introduce aliasing
artifacts that can be reduced or eliminated by increasing this value, up to a maximum
value of 4. Increasing this parameter may cause render times to increase dramatically.
Note: Although the slider is limited to a range of 1 to 4, you can enter larger values into
this parameter’s value field.
PinCushion
The PinCushion node distorts the corners of the image in and out to mimic a particular
type of edge lens distortion. You can push the values below 0 as well.
Parameters
This node displays the following controls in the Parameters tab:
overSampling
The actual number of samples per pixel equals this number squared. For better
antialiasing, increase the number.
xFactor, yFactor
The amount of distortion. Adjusting the xFactor bends the sides of the image, while
adjusting the yFactor bends the top and bottom. Positive values bow the image
outside the frame, and negative values bow the image into the frame.
Randomize
The Randomize node randomizes the position of each pixel within a certain distance. To
randomize the color, create a Rand node, and layer it with your image using an IMult
node.
Parameters
This node displays the following controls in the Parameters tab:
overSampling
The actual number of samples per pixel equals this number squared. For better
antialiasing, increase the number.
seed
When Shake generates a random pattern of values, you need to make sure for
purposes of compositing that you can recreate the same random pattern a second
time. In other words, you want to be able to create different random patterns,
evaluating each one until you find the one that works best, but then you don’t want
that particular random pattern to change again.