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6
In the diagram below, white smokes in the chromakeyed foreground show black edges
on the rims.
To solve this issue, set the background brightness to a value lower than than the
foreground brightness, yielding a more natural look of the smoke as shown below.
Background brightness set to 99% of
the maximum brightness.
Foreground brightness set to 70-83%
of the maximum brightness, thus
looking greyish to human eyes.
Background brightness set to 38-60%
of the maximum brightness.
Foreground brightness set to 70-83%
of the maximum brightness, thus
looking natural to human eyes.
56
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