RGBA Keyer

Category: Processing > Image Processing

Shader Family: Texture

Output: Color

Is extremely useful if you wish to key a specific color out of a texture or shader and obtain a matte to interactively color correct it.

Name	The shader's name. Enter any name you like, or leave the default.
Minimum Threshold	Defines the minimum RGBA value that can be attained before the input color is out of range.
Input	Defines the input texture or shader to key.
Maximum Threshold	Defines the maximum RGBA value that can be attained before the input color is out of range.
Include Alpha	Includes the alpha channel.
Color if In Range	Defines the In Range color as long as the input remains between the Minimum and Maximum Threshold parameters.
Color if Outside Range	Defines the color if the input falls out of the range set by the Minimum and Maximum Threshold parameters.

Render Tree Usage

This shader is almost always placed directly after (to the right of) a color output in order to isolate a range before it is input to a color parameter.