Apple Motion 4 - Manual (Page 336)

Overlapping midrange color values are mixed together differently depending on the
brightness of the background color values. Lighter background midrange values are
mixed by screening. Darker background midrange values, on the other hand, are mixed
together by multiplying.
The visible result is that darker color values in the background image intensify the
foreground image, while lighter color values in the background image wash out
overlapping areas in the foreground image.
The order of two objects affected by the Hard Light blend mode is important.
Boxes object on top Monkey object on top
Vivid Light
Vivid Light is similar to the Hard Light blend mode, with two exceptions. The first is that
midrange color values are mixed together more intensely. The second is that whites and
blacks from either overlapping image are preserved in the end result.
Note: Some dithering may result in overlapping areas of solid white and solid black.
Overlapping midrange color values are mixed together differently depending on the
brightness of the background color values. Lighter midrange values become washed out,
while the contrast of darker midrange color values is increased. The overall effect is more
pronounced than with the Hard Light blend mode.
336 Chapter 7 Basic Compositing