• Adobe After Effects

  Glass of water in front of green screen- problems

  Posted by Dave Vizian on September 12, 2012 at 3:52 pm

  I’m having trouble keeping a glass of water intact when keyed in the foreground of a green screen shot. I’m on CS5 and using Keylight as well as other simple keys. I’m getting a great key around the talent, but the glass is a real problem! It’s a real case of eroding glass syndrome.

  Anyone know the best way to tackle this?

  Here’s the shot:

  https://www.takeoutdoesitall.com/glassshotlq.mov

  Thanks everyone

  Angelo Lorenzo replied 14 years ago 2 Members · 3 Replies
• 3 Replies

• 

  Angelo Lorenzo

  September 12, 2012 at 4:16 pm

  Are you keying everything with the same settings? Or have you separated the foreground, keyed each section differently, but still feel you’re not getting a good key just for the glass?

  Angelo Lorenzo
  Fallen Empire Digital Production Services – Los Angeles
  RED transcoding, on-set DIT, and RED Epic rental services
  Fallen Empire – The Blog
  A blog dedicated to filmmaking, the RED workflow, and DIT tips and tricks
• 

  Dave Vizian

  September 13, 2012 at 1:16 am

  I pretty much keyed for the talent and it was fine until I got to parts where the glass is to the side of him. There should be a separate key for the glass?

  Thanks
• 

  Angelo Lorenzo

  September 13, 2012 at 4:02 pm

  Totally, rarely does anything key correctly through an entire scene.

  1) Duplicate the layer
  2) On layer 1 create a rough, tracked, mask around your people. Key the greenscreen that’s left around them
  3) On layer 2, create a mask around the glass and key it separately, you’ll need to be a lot more gentle with the settings.

  If the subject and the glass cross at any point, you may need to do some rotoscoping, but I think anyone would be hard pressed to say you could do this with one key.

  Angelo Lorenzo
  Fallen Empire Digital Production Services – Los Angeles
  RED transcoding, on-set DIT, and RED Epic rental services
  Fallen Empire – The Blog
  A blog dedicated to filmmaking, the RED workflow, and DIT tips and tricks

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