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 Colorsis true,
Threshold0 results in all colors being inverted, since all brightnesses are greater than or equal to 0. When
Invert Lighter Colorsis false,
Threshold1 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
Thresholdare inverted — this results in a darker image, matching Photoshop’s behavior. When false, the colors darker than
Thresholdare 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