Select node
The Select node assigns one or more 3D textures based on samples whose color index match the color parameter.

Inputs
The Select node accepts two or more 3D texture inputs:
The default texture, used for all samples that don’t match the color parameter.
Selected texture that is assigned to all samples that match.
This node is variadic, and more inputs with associated color indicies can be added.
Outputs
The Select node generates a merged 3D texture.
Parameters
The Select node accepts 2 parameters:
A color index that is compared with the color index of each sample
A tolerance value used when comparing the color parameter with the sample’s color index