• Adobe After Effects

  Chroma Key Outer Glow Issue

  Posted by Zippy Momin on October 26, 2013 at 10:13 pm

  hello to all I am attaching 3 snapshots…the first one is of the keyed out footage..second one is of my circular objectthing below the keyed out footage…and third is the object above the keyed out footage. Now again if I place the object below the keyed footage as seen in the snapshot…i dont get an outer glow and it seems fake even when i track it. When I put the object above the keyed footage the actors hand comes infront of the object and I have to mask…which I dont mind doing…but my question is if I want that outer glow and the only way is to put it above the footage and mask the arm out whenever it passes over the object….is keying even necessary? I am about to put green screens and I want to add some other objects in the surroundings and Id like the same outer glow…Is what I am asking for possible ? Thanks so much ! P.S the alpha exported a bit weird but the circle on the chest is all keyed out. Below are the images. Thanks in advance!

  https://docs.google.com/document/d/18FRFtzf5yAzqHkhXYyCGUVWNtSiNFJMW5sQvoueLgE8/edit?usp=sharing
  https://docs.google.com/document/d/1fYjPsVLw9PwbG8X0rTmDjgtW8WPHvb5dAoNxhE3AzrA/edit?usp=sharing
  https://docs.google.com/document/d/1iD1xrLFIMIGvRlvqhMNSYUU4AhlsGsA7UtmBykd8uqg/edit?usp=sharing

  Darby Edelen replied 12 years, 10 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Erik Waluska

  October 28, 2013 at 12:29 am

  If I understand what you’re doing, I think you could put a copy of the circle thing under the keyed actor and another copy on top. The copy underneath would save you from having to mask the entire hand because the chroma key would do that. For the copy on top you could just use a loose garbage matte to cut out the middle of the circle where the hand will be, just leaving the outer edge and glow of the circle showing. Then you would only have to mask the edge of the circle where the hand crosses it. Does that make sense?

  Erik Waluska
  EAWmedia
• 

  Darby Edelen

  October 28, 2013 at 5:21 am

  If I understand the setup correctly then I’d leave the footage underneath the actor. Then I’d use an adjustment layer above the actor (or pre-compose both footage layers) to create the glow only on the bright blue areas.

  Darby Edelen

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