Lift Gamma Gain

This effect allows you to perform three-way color grading. The Lift Gamma Gain trackballs follow the ASC CDL standard. When you adjust the position of the point on the trackball, it shifts the hue of the image towards that color in the given tonal range. Use the different trackballs to affect different ranges within the image. Adjust the slider under the trackball to offset the color lightness of that range.

Using Lift Gamma Gain

Lift Gamma Gain uses the Volume framework, so to enable and modify the lift, gamma, or gain of the render, you must add a Lift Gamma Gain override to a Volume in your Scene. To add Lift Gamma Gain to a Volume:

1. In the Scene or Hierarchy view, select a GameObject that contains a Volume component to view it in the Inspector.
2. In the Inspector, go to Add Override > Post-processing and select Lift Gamma Gain. HDRP now applies Lift Gamma Gain to any Camera this Volume affects.

API

To access and control this override at runtime, use the Volume scripting API. Because of how the Volume system works, you edit properties in a different way to standard Unity components. There are also other nuances to be aware of too, such as each property has an overrideState. This indicates to the Volume system whether to use the property value you set, or use the default value stored in the Volume Profile. For information on how to use the API correctly, see Volume scripting API.

Properties

Property	Description
Lift	Use this to control the dark tones. This has a more exaggerated effect on shadows. • Use the trackball to select which color HDRP should shift the hue of the dark tones to. •Use the slider to offset the color lightness of the trackball color.
Gamma	Use this to control the mid-range tones with a power function. • Use the trackball to select which color HDRP should use to shift the hue of the mid-tones to. • Use the slider to offset the color lightness of the trackball color.
Gain	Use this to increase the signal and make highlights brighter. • Use the trackball to select which color that HDRP uses to shift the hue of the highlights to. • Use the slider to offset the color lightness of the trackball color.