Graphics Programs Reference
In-Depth Information
Gamma, Gain, and Lift
To arrive at a desired result quicker when using a Color Correction node, understand-
ing the difference in control between Gamma, Gain, and Lift is vital. These terms can
be understood better using an input (x axis) versus output (y axis) plot, as seen in
following screenshot:
Each of these three properties controls the specific tonal information of an image,
summarized as follows:
•
Gamma
: This property controls the curve exponent, affecting the midtones
of an image
•
Gain
: This property controls the curve slope, mostly influencing the image
highlights
•
Lift
: This property controls the curve offset, mostly influencing the image
shadows
Mask socket
The
Mask
socket, also available for many other nodes, can be used to plug a gray-
scale map to specify the node influence on the output. Node influence will be 100
percent at value
1
.
