The spill suppressor does very little that Keylight doesn't already do by itself. There's only so many times you can run over footage and mess with its colors. The suppressor will simply recognize that. otehr than that it's a typical case of "your mileage may vary". Just because it doesn't improve your current workflow doesn't mean it could not be useful in the future. In reverse, it could simply mean that your screen setup is reasonably perfect and there'S simply not much left to improve, something which you should probably take some pride in.
When I put the view with Keylight on "intermediate results" I notice a difference after turning on the suppressor. But when I put in "final result" with Keylight there is no difference at all.
final results means you want Keylight to deal with suppressing the green. that's why there is no difference when you apply the suppressor because you are preforming the same task twice
At the end of the day final result looks better then intermediate with suppressor.
often it's not the case. many times letting Keylight deal with suppressing the green will create noise artifacts and that's why the advanced spill suppressor was created. there are also other spill killers scripts and plugins out there for that purpose. if you are a Lynda subscriber, you can learn all about why you should be using intermediate and not final result, and the whole keying process in detail in this series by Vfx master Mark Christiansen to learn all about getting the best out of your key: After Effects Compositing 04: Color Keying
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