Know which Keylight controls to ignore

As you've watched me work in Keylight you may have…noticed many controls in here that we're not touching.…I'd like to give you a breakdown of how they're organized,…what they basically do, and why,…having used all of them at one time or another,…I now recommend leaving most of them alone.…First of all, it's important for you to know…that everything above that Screen Matte twirldown…is actually integrated into the keying operation.…

So from Screen Colour through Screen Pre-Blur,…those are all controls that affect…pulling the actual key itself.…Everything below that, it's as if you were…applying a separate effect after the key.…So Screen Gain seems to be similar to Clip Black, but it…has the same unpleasant side effects that Final Result has…Namely, if I boost it up really high,…you're going to notice holes and grain in the footage,…and those happen to a lesser extent even…at a normal amount of application of that.…

So instead of Screen Gain,…I definitely suggest you just use Clip Black.…The Screen Balance control is set automatically…