Keylight problem

[Erik Pontius]

Check your spill suppression…Keylight defaults to a light gray color for a replacement color….choose a color that is closer to the predominant color in your subject.
Also, check your “status” view in keylight…the light green areas indicate areas that keylight is modifying, in most case that is where you will see the majority of this “grain”. Also, there is a good chance that in order to key out large areas of your background you are having keylight process way more than is necessary and are taking out more of your subject than you need to. There are a couple of good tutorials, light the “super tight junk matte” tutorial that can eliminate the majority of your background allowing you to only worry about keying a small amount of your background around your subject.

Erik

[Kevin Camp]

barend also has a tutorial (more like a preview) using keylight.

also, once you’ve watched the supertight junk mattes tutoiral, you can modify the process (if auto-trace takes too much time for you) by using a duplicate of your footage with keylight applied in a prelimiary state, set it to ‘combined matte’ (rather than ‘final result’) to show just the matte. if needed tweak the setting to make it a little harsher than normal, so the whites are very white and the blacks are very black. then apply minimax to that layer to blow out the edges of the matte (similar to expand matte in the supertight junk matte tutorial), setting of around 5-10 usually works.

now, use this layer as your track matte for the final keyed layer as you would have in aharon’s tutorial.

Kevin Camp
Designer – KCPQ, KMYQ & KRCW

[Ong Joseph]

Thanks alot for the help. I finally managed to get my footage to work.