User Manual

To slip the sync of a matte relative to the clip it’s attached to:
1 Select the Ext Matte node you want to slip.
2 Open the Key palette, and turn off the Lock Matte checkbox.
3 Raise or lower the Offset parameter until the matte is perfectly aligned with the clip it’s
supposed to match..
To transform a matte:
1 Select the Ext Matte you want to transform.
2 Open the Key palette, and turn off the Lock Matte checkbox.
3 Use the Pan, Tilt, Zoom, Rotate, Width, Height, HFlip, or VFlip parameters to adjust the
matte so it has the correct geometry.
It’s worth mentioning that you can attach as many external mattes to a single clip in
DaVinci Resolve as you like. For example, if a CGI shot has been delivered with a set of isolation
mattes for each of three characters in the scene, you can import all three mattes and use them
to isolate adjustments that you want to make in the Node Editor.
Extracting External Mattes from OpenEXR Layers
OpenEXR media is capable of containing multiple layers and multiple alpha channels, which can
also be accessed from EXT MATTE nodes. As a result, DaVinci Resolve uses a slightly different
but related procedure for accessing these mattes.
To extract OpenEXR layers as external matte nodes:
1 Right-click any node, and choose the .exr clip name from the Add Matte submenu of
the contextual menu.
By default, the EXT MATTE node that appears has its first output connected to the
Connect one of the EXT MATTE node’s triangular key outputs to the key input of a
node you want it to limit.
2 Double-click the EXT MATTE node to select it, then right-click it and choose which
layer you want to use from the Select Matte submenu.
Right-clicking an OpenEXR file’s EXT MATTE node to choose which layer to use
Chapter – 126 Combining Keys and Using Mattes 2862