The Channel Mixer node allows you to combine channels from multiple textures. 

Figure 1: Channel mixer Node

Parameters

    • Enabled - Whether this layer is applied or skipped.
    • Attach to layer - When selected, this layer modifies the input of the next lower layer that is not itself attached to a layer. Otherwise, it applies to the output of the next lower layer.
    • Red channel - The weights applied to the input to calculate the red channel in the mix.
    • Green channel - The weights applied to the input to calculate the green channel in the mix.
    • Blue channel - The weights applied to the input to calculate the blue channel in the mix.
    • Opacity - The opacity channel used to control the transparency of this layer.
    • Blend mode - The blend mode used to mix the RGB values of this layer with those of the background.