The secret option to disable VBL sync can give a massive increase in
performance in the case when you have a single QC composition
stretched across two screens, which is an odd but fairly common
configuration for some QC video art pieces. Disabling VBL leads
to image tearing, which is visually unappealing depending on the
content being displayed.
Question -- is it possible to disable VBL on a per-screen basis inside
QC? In many cases, screen #1 is a UI screen not visible to the
public on which VBL can be safely ignored, whereas screen #2 is the
performance screen where syncing with VBL would be nice.
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