Inverts the colors of some parts of the image depending on the brightness.
Threshold — The cutoff point at which to start inverting colors. When Invert Lighter Colors is true, Threshold 0 results in all colors being inverted, since all brightnesses are greater than or equal to 0. When Invert Lighter Colors is false, Threshold 1 results in all colors being inverted, since all brightnesses are less than or equal to 1.Sharpness — How sharp the transitions from non-inverted to inverted will be. When 0, the transitions are gradual; when 1, the transitions are sharp.Invert Lighter Colors — When true, the colors lighter than Threshold are inverted — this results in a darker image, matching Photoshop’s behavior. When false, the colors darker than Threshold are inverted — this results in a lighter image.
Thanks to Brad Larson and Martinus Magneson for the GLSL implementation this node is based on.
Keywords: Sabattier, brightness, darkroom, filter, invert, lightness, luminance, negative, reverse