beautypg.com

Apple Motion 3 User Manual

Page 872

background image

872

Chapter 10

Using Filters

Brightness

Boosts or lowers the uniform brightness of an image by the specified amount.

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

” on page 881.

Parameters in the Inspector

Brightness: Sets the multiplying brightness value applied to the object. Values range
from 0 (no brightness, black image) to 10.

Mix: Sets what percentage of the original image is blended with the filtered image.
Values range from 0 to 100%.

HUD Controls
The HUD contains the Brightness control.

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.

Original image

Brightness Filter applied