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Adjusting Foreground Ambiance Controls
To make a composite more convincing, it is important that the foreground subject fits
seamlessly into its new background environment. The ‘ambiance’ feature in Ultimatte analyzes
the colors of the background and foreground layers, and automatically adds subtle color
influences from the background into the foreground layer. This feature is enabled by default.
The ambiance controls also allow you to set the amount of influence that the background has
on the foreground layer, and finesse the color balance.
To make foreground ambiance changes:
1 Select ‘foreground’ in the main menu buttons.
2 In the ‘groups’ section, click on ‘ambiance 1’ or ‘ambiance 2’ to access these menus.
Ambiance reset
Click the ‘ambiance reset’ button to reset all ambiance controls to their default settings.
Ambiance
Use this button to disable or enable the ambiance feature. The default setting of this button is
‘enabled’.
Ambiance 1 Settings
The ambiance controls will add very subtle amounts of color from the background, simulating
reflected ambient light from the background source.
Ambiance Level Red, Green, Blue
Adjust these settings to increase or decrease effects of the red, green and blue components
ofthe background ambiance that will influence the foreground color levels.
Ambiance Level Master
This setting adjusts the overall level of the ambiance that will influence the foreground color
levels. When adjusting this control, the relative difference between the ambiance red, green,
and blue components will be maintained.
Ambiance Strength
This setting adjusts the strength of the ambiance that will influence the main area of the
foreground subject, compared to the transition areas from the foreground subject to the
background scene. At its maximum setting, the ambiance will have full influence on the main
area as well as the transition region, while at the minimum setting, the ambiance will have no
influence in the main area while having a stronger influence in the transition regions.
Direct Light Mix
This setting controls the proportion by which the foreground subject will be influenced by the
ambiance colors and user adjustable direct lighting. At the maximum setting, the foreground
subject is influenced entirely by the direct light controls, and at its minimum setting, the
foreground subject is influenced entirely by the ambiance colors.
Vertical Blur
This setting determines the number of averaged lines in the background used in ambiance
calculations. Depending on the background scene, reducing this control could introduce
streaking on the foreground layer.
Ambiance 2 Settings
The direct light controls will make more aggressive changes to the foreground image,
simulating light that is directly from a position in the front of the foreground subject.
44Advanced Ultimatte Controls
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