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Mask edge Problem

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  • Posts: 7
  • Joined: Wed Apr 20, 2016 1:33 pm

Mask edge Problem

PostTue May 10, 2016 10:13 am


Im new here, Just trying to get to grips with Fusion after years with After Effects.

Im having an issue with the edges of masks. They appear to have a white line around the outside and when I try to feather the edges, depending on whether the mask is inverted or not I either get a dark or light outline.

Is this a normal issue or am I doing something wrong?


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Sam Biddle

  • Posts: 30
  • Joined: Wed Feb 03, 2016 4:09 pm
  • Location: London

Re: Mask edge Problem

PostTue May 10, 2016 4:58 pm

Sounds like a premult/unpremult issue;

http://www.spherevfx.com/written-traini ... ed-images/

Use an Alpha Divide node (ADv) or Alpha Multiply node (AMl) depending on whether you're getting dark or light edges.
Sam Biddle
3D Artist @ BlueBolt VFX

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