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Although this may seem to be the first filter to use to correct for improper exposure in
an image, Brightness boosts or lowers everything in an image at once. This means that
raising the brightness in an image raises brightness everywhere, including in the shadows.
Consequently, a brightened image can look washed out.
However, this filter is useful for modifying 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 the percentage of the original image to be 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—Red Output, Green Output,
Blue Output, and Alpha Output—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.
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.
1024 Chapter 19 Using Filters