The Gamma correction node modifies the colors of a terrain with a color map.
If the input terrain does not have a color map, the
node is invalid.
To add a Gamma correction node, right-click in the Graph Editor and select Create Node > Terrain transformation > Gamma correction or use the keyboard shortcut N-T-G-C: Node Terrain Gamma Correction.
Select the node to open its parameters:
In both cases, the areas of low light and the areas of high light are little changed.
For example, initial image:
Result with Gamma = 2:
Result with Gamma = 0.5:
The result is different from that produced by the Brightness & Contrast node, which modifies all the points of the terrain in the same way.
|Gamma||Darkens or brightens the points of average brightness.|
|Channels||Sets the red, green and/or blue channels to modify.|
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