With the release of Continuum 11, Boris FX has streamlined the way users interact with matte keys or alpha title mattes in Avid. Instead of having to set the multi-filter start-mid-end checkboxes in a multi-filter stack, this is now handled automatically from within Continuum.
There are only three basic rules that must now be followed, which are:
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the first filter should have the apply to alpha option enabled
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the last filter should have itβs background set to first (or second) below
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all filters except for the last filter should have the background set to none
single filter:
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simply apply the filter and enable the apply to title matte option
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the background is automatically set to 1st below
multi-filter:
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apply any number of filters
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in the first filter, enable the apply to title matte option
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in all filters except for the filter at the top of the stack (the last one to render) set the background to none
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in the filter at the top of the stack (the last one to render) set the background to 1st below
important note:
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when dragging the first filter onto the alpha matte clip, do not hold the alt/option key
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for all additional filters, hold down the alt/option key