User Manual

Inspector
Gain Tab
The Gain tab provides control of individual RGBA Lift/Gamma/Gain parameters. These controls
can quickly enable you to fix irregular color imbalances in specific channels.
Lock R/G/B
When selected, the Red, Green, and Blue channel controls for each effect are combined into
one slider. Alpha channel effects remain separate.
Gain RGBA
The Gain RGBA controls multiply the values of the image channel in a linear fashion. All pixels
are multiplied by the same factor, but the effect is larger on bright pixels and smaller on dark
pixels. Black pixels do not change because multiplying any number times 0 is always 0.
Lift RGBA
While Gain scales the color values around black, Lift scales the color values around white. The
pixel values are multiplied by the value of this control. A Lift of 0.5 makes a pixel that is R0.0
G0.0 B0.0 into R0.5 G0.5, B0.5, while leaving white pixels totally unaffected. Lift affects lower
values more than it affects higher values, so the effect is strongest in the midrange and low
range of the image.
Gamma RGBA
The Gamma RGBA controls affect the brightness of the midrange in the image. The effect of
this node is nonlinear. White and black pixels in the image are not affected when gamma is
modified, whereas pure grays are affected most by changes to this parameter. Large changes
to this control tend to push midrange pixels into black or white, depending on the value used.
Chapter – 85 Color Nodes 1871