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Chapter 12 Primary Out 261
As the processed image makes its way from the Primary In to the Secondaries to the
Color FX rooms, the corrections in each room are applied to the image that’s handed
off from the previous room. Since the Color FX room is the last correction room in
every grade, it processes the image that’s output from the Color FX room. You can take
advantage of this to apply overall corrections to the post-processed image.
In the following example, a series of highly saturated adjustments are made in each of
the rooms, but the Primary Out room is used to reduce the saturation of the end result,
a correction that modifies the collective output from every other room.
Using the Ceiling Controls
Lastly, the Primary Out room has a single group of controls that aren’t found in the
Primary In room. The Enable Clipping button in the Basic tab of the Primary Out room
lets you enable individual ceiling values for the red, green, and blue color channels of
the current shot.
This lets you prevent illegal broadcast values in shots to which you’re applying extreme
Primary, Secondary, or Color FX corrections if you don’t want to turn on Broadcast Safe
for the entire program.
Note: If Enable Clipping and Broadcast Safe are both on, the lowest standard is applied.
 Enable Clipping button: Enables the Ceiling Red/Green/Blue controls to take effect.
 Ceiling Red: Sets the maximum allowable chroma in the red channel. All values above
this level will be set to this level.
 Ceiling Green: Sets the maximum allowable chroma in the green channel. All values
above this level will be set to this level.
 Ceiling Blue: Sets the maximum allowable chroma in the blue channel. All values
above this level will be set to this level.