User Manual

Table Of Contents
Because the Merge1 node outputs the entire composition as a single image, a second
MediaOut node (highlighted) is added to output the matte, just in case the colorist might want to
use it later.
TIP: In this composition, the foreground and background images are different sizes, so
outputting the alpha channel of the DeltaKeyer1 node would result in a matte sized to
match the foreground image, but that doesn’t fit the composition, which is cropping the
top and bottom of the foreground image based on the frame size of the widescreen
background image. To get around this, the foreground and background images are
composited a second time using the Merge2 node, which has the Operator parameter
set to “In” to output just the foreground image and matte, as resized by the Merge
operation. The resulting MediaOut2 node thus outputs a foreground matte that’s
properly sized to fit the composition.
On the Color page, the grade in node 1 is applied to the overall final result, which is a single
image. After grading, it’s decided that the woman appears a bit warm relative to the cool blue of
the planet behind.
The composition as it appears in the Color page Node Viewer
Right-clicking the background of the Node Editor and choosing Add Source adds a second
source at the left of the Node Editor.
Adding a source to bring in the MediaOut2 node’s
matte output from the Fusion page composition
This second source corresponds to the second MediaOut node you added to the Fusion page
composition, which outputs the Matte as a key in the Color page, usable just like any other key.
If you hover your pointer over each source, a tooltip appears letting you know which output
corresponds to which node.
Chapter – 126 Combining Keys and Using Mattes 2867