• Adobe After Effects

  Crazy Alpha – really bewildering

  Posted by Antony Buonomo on March 29, 2008 at 10:37 am

  Hi

  I’ve come across a weird problem with a project –

  https://www.vertigo.co.uk/test/crazy_alpha.jpg

  As you can see there is a bar of the original image that won’t be keyed out with the Color Range effect. OK… however the really confusing thing happens when I scrub the x value of the position property. The image moves relative to the bar but only until it reaches the edges of the image, then everything moves. It’s really hard to explain so here’s a link to the project –

  https://www.vertigo.co.uk/test/

  I’m stumped and have had to find a work-around, but if anyone can solve this I would love to hear it.

  Cheers

  A

  Vertigo Productions
  https://www.vertigo.co.uk

  Curious Turtle replied 18 years, 1 month ago 2 Members · 3 Replies
• 3 Replies

• 

  Curious Turtle

  March 31, 2008 at 6:54 am

  Hi Antony,

  It’s not that bewildering. Your adjustment layer isn’t the same size as the comp, so it’s only affecting the part of the image that it covers.

  Make you adjustment layer bigger and, if I’m reading your post correctly, your problem goes away. Shazam!

  Good luck with your project,
  Ben

  Curious Turtle Professional Video
  Training | Editing |Support

  http://www.curiousturtle.com
• 

  Antony Buonomo

  March 31, 2008 at 7:44 am

  How embarrassing!

  I was staring at the problem for 30 minutes and didn’t see it. This was an extract from a larger project and couldn’t see the wood for the trees. That’s my excuse anyway!

  Cheers

  A

  Vertigo Productions
  https://www.vertigo.co.uk
• 

  Curious Turtle

  March 31, 2008 at 8:44 pm

  No worries. We’ve all been there :o)

  Glad you got it sorted.

  Ben

  Curious Turtle Professional Video
  Training | Editing |Support

  http://www.curiousturtle.com

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