The Color Key node is used to key out a specified color in a connected texture map (figure 1). 



Tool Color Key



Figure 1: The Color Key node used to key out the red color on a connected texture map and replace it with pink


Color Key Parameters

Input Pin - Image to be keyed.

Key Color - The color to be keyed.

Mask - Garbage matte should be connected here. 

Fill Color - The color to replace the keyed area. 

Low/High Cutoff - The low and high cutoff for the color difference. 

Computation Gamma - Adjusts the color range midtones before computing the difference. 

Projection Pin - Specifies the projection type to be used for this texture. 

U Cutoff Low/High - Specifies the low and high edge of simple 2D cutoff in the U direction. 

V Cutoff Low/High - Specifies the low and high edge of simple 2D cutoff in the V direction.