The Map Range node remaps an input value by interpolating it to a newly defined output range. 

Figure 1: Map range 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.
    • Input minimum - The start value of the input range.
    • Input maximum - The end value of the input range.
    • Clamp - If enabled, the values are clamped to the minimum and maximum range. Otherwise values outside the range will be unmodified.
    • Output minimum - The start value of the output range.
    • Output maximum - The end value of the output range.
    • Interpolation - Mode used for translation. 
      • Linear
      • Smoothstep
      • Smootherstep
      • Steps
      • Posterize
    • Levels - Number of distinct output levels. Only active when using the Steps or Posterize interpolation methods.
    • 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.