• Adobe After Effects

  unmult vs. screen transfer mode

  Posted by Kenny Mims on May 5, 2005 at 7:57 pm

  Gee guys, I can’t seem to tell any difference between using the unmult plugin or setting the layer transfer mode to screen.

  Perhaps one of you might explain this?

  Thanks!

  Kenny Mims replied 21 years ago 3 Members · 3 Replies
• 3 Replies

• 

  John Dickinson

  May 5, 2005 at 8:53 pm

  Unmult and other plug-ins like Xmult and Walker Effects Premultipy create an alpha channel for layer they are applied to, Screen mode doesn’t.
• 

  Barend Onneweer

  May 5, 2005 at 9:51 pm

  On a dark background you might not see much of a difference, but if you have an explosion or something similar you need to composite onto a bright background there’s a huge difference between unmultiplying and screening.

  Without going into the math here: generally using Unmult gives the colors more ‘body’ and a less transparent look.

  Bar3nd

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• 

  Kenny Mims

  May 5, 2005 at 10:34 pm

  Thanks guys. I see it!

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