After Effects Question - Keying
Hey AE experts - I'm thinking of purchasing AE for a project, here's a question regarding matting (and I'm not seeking a tutorial, just want to know if it's possible):
Say you're pulling a luma or color key, and you have the key dialed in to where you're happy. Then you want to do something radical to the footage that affects the color - say keyframe it so the saturation fades out or brightness, color balance, etc. changes. Since the matte produced by the keying process is based on things like color & luma, will your key then fall apart? Or is there a way to lock the key or separate it from the footage (but still aligned with the footage spatially and temporally) so it remains a useable mask. My real expertise is in Photoshop; the Photoshop metaphor would be making a mask and then converting it to an adjustment layer or layer mask, a free-standing thing independent of the data on the image layer - is there an AE function like that? THANKS! - MC |
Hi Michael,
AE allows you to add an 'Adjustment layer' too... Stick it at the top of the stack and you should be able to do what you suggest. Gareth |
Effects in AE are in an order from top to bottom. If you add a Luma Key, and then a color balance effect it will not change your key at all. You could even move the color effect up to apply BEFORE the Luma Key if you wish -and things may change. So the order in which you have the effects can affect the image in different ways. So you have nothing to worry about.
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thanks guys!
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