The Threshold node outputs either a black or white value based on the luminance value of a texture layer. 


Threshold

Figure 1: Threshold Node


Threshold 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.

Threshold level - The output is black if the luminance of the input is below this threshold, and white if it is greater than or equal to this value.

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.