The Clamp node allows you to set the min and max color range of a texture layer. 

Figure 1: Clamp 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.
    • Minimum - Set lowest color value.
    • Maximum - Set highest color value.
    • Channels - The channels to which to apply the operation (others are left unmodified).
    • 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.