Apple Motion 3 - Manual (Page 305)

Chapter 3 Basic Compositing 305
The methods used by the Pin Light blend mode to mix two images are somewhat
complex. Overlapping midrange color values are treated differently depending on
which of the four regions of the luminance chart they fall into.
 Lighter and darker areas of the foreground image falling close to the whites and
blacks are preserved.
 Areas of the foreground image falling near the center of the midrange are tinted by
the background color.
 Darker areas of the foreground image in between the blacks and center of the
midrange are lightened.
 Lighter areas of the foreground image in between the whites and the center of the
midrange are darkened.
The end result may appear alternately tinted or solarized, depending on the lightness
or darkness of the overlapping values. This blend mode lends itself to more abstract
effects.
The order of two objects affected by the Pin Light blend mode is important.
Hard Mix
Hard Mix is similar to the Hard Light blend mode, except that the saturation of
overlapping midrange color values is intensified, resulting in extremely high-contrast
images. Whites and blacks are preserved.
Boxes object on top Monkey object on top