Gamut Check is a GPU based, real-time frame processing that detects any out-of-gamut values in the incoming (unmodified) signal:
Gamut check works together with Error Logger scope. In order to start logging the gamut errors, Gamut Check needs to be enabled.
Please note that Gamut Check processes the unmodified input frame in real-time which might affect the performance of the application. Furthermore, if the machine is not fast enough and dropped frames occur - the end result of the gamut check can't be trusted simply because it missed some frames during the process.