2011

Table Of Contents
3 Click the Operator button and select a math operator.
To:Select:
Add to the RGBA of input A, a percentage (using the Blend value) of the
RGBA of input B.
Add
Divide the RGBA values of input A by the RGBA values of input B.Div
Create a composite image where the final output will be the maximum
RGBA values of either input A or input B.
Max
Create a composite image where the final output will be the minimum
RGBA values of either input A or input B.
Min
Mix the RGBA values of input A with the RGBA values of input B: 0% =
completely A, 100% = completely B.
Mix
Multiply the RGBA values of input A by the RGBA values of input B.Mult
Mimic the effect of combining two film negatives together. Both layers are
inverted, then multiplied, and finally the results are inverted back.
Screen
Subtract from the RGBA of input A a percentage (using the Blend value) of
the RGBA of input B.
Sub
4 Blend the images. The blend factor controls the blend between the result
of the math operation and the original input.
NOTE The Math Ops tool has a masking input and its attributes are also
animatablesee
Pixel Masking on page 560 and Animation Concepts on page 660.
Multi-stream Compositing
Use the Streams tools to perform identical processing on multiple image
streams avoiding the creation of identical sub-graphs to process a number of
images in the same way. The Streams tools can also be used to support a stereo
workflow in Composite see
Stereo Viewing on page 374. There are three
Streams tools:
To:Use:
merge multiple single-stream image inputs into a single multi-
stream output. It has a single multi-valued image input socket,
Merge Streams
Multi-stream Compositing | 371