User guide

268
shutter globals.compDefaults.
motionBlur.shutter.i0,
globals.compDefaults.
motionBlur.shutter.i1
Sets the open and close time of the shutter
when motion blurring, relative to the current
frame. Changing the second number is the
primary way to control the amount of motion
blur applied. For example, a value of 0.5
corresponds to half a frame. Increasing the
value produces more blur, and decreasing the
value less.
numSamples globals.compDefaults.
motionBlur.numSamples
Sets the number of motion blur samples to
compute and merge.
Increase the value to produce more samples for
higher quality, or decrease it to shorten the
processing time. The higher the value, the
smoother the result.
ImageUnder
This node layers images together using the Under compositing algorithm: F(1-b)+B. This is the reverse of the
ImageOver operation. It layers the background over the foreground according to the matte of the background.
Also see ImageOver on page231.
Control (UI) Default Value Function
R enabled When enabled, affect the red channel of the image.
G enabled When enabled, affect the green channel of the image.
B enabled When enabled, affect the blue channel of the image.
A enabled When enabled, affect the alpha channel of the image.
mix 1 Dissolves between the bg image at 0 and the full merge effect at
1.
Mask
4 NODES I-K | IMAGEUNDER