• Adobe After Effects

  Keying water

  Posted by Scott Hathaway on June 18, 2009 at 10:59 pm

  Hey there. Does anybody have any proven method for keying water on a green screen or other color screen?

  _________

  I make movies, not a living.

  Scott Hathaway replied 16 years, 10 months ago 2 Members · 2 Replies
• 2 Replies

• 

  David Bogie

  June 19, 2009 at 2:24 pm

  You’ll need to explain the situation as you seem to be asking if the water can be keyed out. If the water is sufficiently pigmented, it’s easy.
  If you’re asking if the water can be keyed out as water, key everything else out and reversing the alpha. Easy.

  bogiesan
• 

  Scott Hathaway

  June 20, 2009 at 4:19 pm

  I succeeded in this effect by shooting the water on a sunny day in broad sun lit with a harsh mirrored backlight against a completely black, shadowless background. I then used the screen blending mode over my footage and got the results I wanted. By crushing the blacks a little the outcome was perfect. Furthermore I pre-comp’d the water layer and applied a displacement map to the background footage and mapped it to the water layer and adjusted the x and y distort thereby effectively ‘refracting’ the background image through the water.

  _________

  I make movies, not a living.

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