Apple Motion 4 - Manual (Page 975)

Although this may seem to be the first filter to use if you want to correct for improper
exposure in an image, the drawback of this filter is that it boosts or lowers everything in
an image at once. This means that raising the brightness in an image raises it everywhere,
including in the shadows. The result is that a brightened image may look washed out.
On the other hand, this filter can come in very handy as a way to modify the edges and
effects of shapes, masks, particle systems, and generators.
A better filter for exposure correction is the Gamma filter. For more information, see
Gamma .
Original image Brightness filter applied
Parameters in the Inspector
Brightness: Sets the multiplying brightness value applied to the object.
Mix: Sets what percentage of the original image is blended with the color-corrected
image.
HUD Controls
The HUD contains the following control: Brightness.
Channel Mixer
Allows cross-mixing of red, green, blue, and alpha channels into one another. The Channel
Mixer filter’s main parameters are divided into four sections, each of which manipulates
an individual channel. In each section, you can adjust the value of the relevant color
channel added to or subtracted from the red, green, blue, and alpha channels. This is a
more flexible version of the Channel Swap filter below.
Parameters in the Inspector
Red - Red: Sets the amount of input red added to the output red. The default value is
1.0, which leaves the red channel unmodified. As this value increases, the output value
of red increases by the amount of input red multiplied by the value of Red - Red.
975 Chapter 16 Using Filters