2013

8 Locate the channel options on the masking tab for the CC Basics tool,
which, by default, is set to alpha.
9 Click the label that reads alpha to expand the list of channels.
10 Click the green option from the list.
Now the color correction only affects the red paint on the car because
the masking option on the CC Basics tool is using only the green channel
information from the disco pass.
11 Hold Ctrl and hit the S key to save your comp.
Node Details and Pixel Masking | 33