Blackmagic Design Ultimatte 12 Manuel D'exploitation page 20

Quick Guide to Building a Composite
This is a basic introduction to performing a fast composite with Ultimatte 12 and
Smart Remote 4.
With all sources connected to the main unit, the first step is to make sure the backing color is
correctly set. The default backing is color is green, but you can set it to red or blue, depending
on which color you are using on set.
If you are using a green screen, you don't need to change the backing color as green is already
set by default. Pressing the 'file clear' button will perform an automatic composite and generate
a matte from your green screen.
TIP An automatic composite will also take place when power cycling your Ultimatte 12.
Setting the Foreground Backing Color
The backing color defines the color Ultimatte will use to generate the matte. Typically, the color
used for most screens for compositing is green, and this is why green is the default backing
color. However, there are occasions on set where red or blue may be a better choice based on
the color of the foreground objects. In this event, you will need to tell Ultimatte to use a different
backing color.
To set the backing color:
1 Tap the 'configure' menu button to open the configure settings.
2
In the functions area, tap one of the red, green or blue backing buttons
to select your desired backing color. You will now see the backing color
indicator in the status bar change to the corresponding backing color.
When the backing color is set, Ultimatte will perform an automatic composite and you will see
the results on the program output. In the monitor out buttons, tap the button marked 'PGM OUT'
to select the program output and the image will appear on the monitor connected to the
monitor output.
Setting Screen Correction
Screen correction can be helpful if there are strong variations in your backing screen, or the
lighting on the backing screen is uneven.
If your camera is static and you can remove all the foreground objects from the scene, you can
perform a screen correction. This shows Ultimatte what the screen looks like by itself, and then
once all elements are replaced, Ultimatte can then analyze what has changed in the foreground
and will generate an optimized matte. This can help tidy up any areas that are not behaving in
your matte.
Quick Guide to Building a Composite 20