• Adobe After Effects Expressions

  change color expression!

  Posted by Thiago Dantas on September 14, 2015 at 10:53 pm

  I have a white wall as a background, this wall its being illuminated by a Tv with amblight.
  I need an expression that take the colors which are being displayed on the wall and put them in a ramp effect.
  Is that even possible?

  THANK S GUYS!

  Thiago Dantas replied 11 years ago 2 Members · 2 Replies
• 2 Replies

• 

  Kalleheikki Kannisto

  September 15, 2015 at 7:52 am

  For picking a color with expression, see this:

  https://blogs.adobe.com/aftereffects/2009/07/color-sampler-using-sampleimag.html

  If you simply want to illuminate the wall with what is being shown on the TV, I would suggest making a copy of the footage, masking it so that just the TV screen is shown, then enlarging it, blurring it massively and compositing with the wall in Screen or Add mode.
• 

  Thiago Dantas

  September 15, 2015 at 2:20 pm

  Thanks Kalle !
  Didn t thought about that. And im going to check this expression too.

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