The Apply Gradient Map node provides remapping by interpolating color values.

Figure 1: Apply gradient map 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.
    • Interpolation type - Determines how the ratios of the input colors vary between control points.
    • Interpolation color space - The color space in which colors are combined between control points. Physical should be used for textures that contain non-color data, like normals.
      • Physical uses scene-linear values and creates gradients that approximate optical effects in the real world. 
      • Perceptual uses the Oklab color space and creates gradients that vary smoothly to the human eye.
    • Start value - Output value at 0.
    • End value - Output value at 1.
    • 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.