User Manual

objects to perform the mixture.
 Multiply: Multiplies the values of a color channel. This gives the appearance of
darkening the object as the values are scaled from 0 to 1. White has a value of 1, so
the result would be the same. Gray has a value of 0.5, so the result would be a darker
object or, in other words, an object half as bright.
 Overlay: Overlay multiplies or screens the color values of the foreground object,
depending on the color values of the background object. Patterns or colors overlay the
existing pixels while preserving the highlights and shadows of the color values of the
objects behind the foreground objects. The objects behind the foreground objects are
not replaced but mixed with the foreground objects to reflect the original lightness or
darkness of the background objects.
 Soft Light: Soft Light darkens or lightens the foreground object, depending on the color
values of the objects behind them. The effect is similar to shining a diffused spotlight
on the image.
 Hard Light: Hard Light multiplies or screens the color values of the foreground object,
depending on the color values of the objects behind them. The effect is similar to
shining a harsh spotlight on the image.
 Color Dodge: Color Dodge uses the foreground object’s color values to brighten
the objects behind them. This is similar to the photographic practice of dodging by
reducing the exposure of an area of a print.
 Color Burn: Color Burn uses the foreground object’s color values to darken the objects
behind them. This is similar to the photographic practice of burning by increasing the
exposure of an area of a print.
 Darken: Darken looks at the color information in each channel and selects the color
value from the object in front or behind, whichever is darker. Pixels lighter than the
blended colors are replaced, and pixels darker than the blended color do not change.
 Lighten: Lighten looks at the color information in each channel and selects the color
value from the object in front or behind, whichever is lighter. Pixels darker than the
blended color are replaced, and pixels lighter than the blended color do not change.
 Difference: Difference looks at the color information in each channel and subtracts
the foreground object’s color values from the background object’s color values or vice
versa, depending on which has the higher brightness value. Blending with white inverts
the color. Blending with black produces no change.
 Exclusion: Exclusion creates an effect similar to but lower in contrast than the
Difference mode. Blending with white inverts the base color values. Blending with
black produces no change.
 Hue: Hue creates color with the luminance and saturation of the background object’s
color and the hue of the foreground object’s color.
 Saturation: Saturation creates color with the luminance and hue of the base color and
the saturation of the blend color.
 Color: Color creates color with the luminance of the background object’s color and the
hue and saturation of the object in front. This preserves the gray levels in the image
and is useful for colorizing monochrome objects.
 Luminosity: Luminosity creates color with the hue and saturation of the background
object’s color and the luminance of the foreground object’s color. This mode creates an
inverse effect from that of the Color mode.
Chapter – 88 Effect Nodes 1964