ADOBE AFTER EFFECTS: Forum Expressions Tutorials Podcasts Creative Cloud

Black line around mask

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Kar BonBlack line around mask
by on Feb 10, 2016 at 12:45:14 pm

Hello all !

On a video made with Keyshot, I want to place a towel around a blade.

To do so, half of the towel should be behind the blade, and the other half should be in front of it.

To do so, I have created one "addition" mask on the blade. I then copied the layer containing the addition mask and paste it.
On the paste layer, I changed the mask from addition to "subtraction". The shape and movement of both masks are thus exactly the same.

Here are pictures of the addition and subtraction masks.

But there's a problem. On AE composition and on the rendered video, I get this black line around the blade.

How could I remove it, or at least make it less visible ?

Thank you very much in advance.

Return to posts index

Cassius MarquesRe: Black line around mask
by on Feb 10, 2016 at 12:51:08 pm

have you tried to choke the layer by some fractions of a pixel? (simple choker effect for ex.)

Cassius Marques

Return to posts index

Kar BonRe: Black line around mask
by on Feb 10, 2016 at 1:05:54 pm

Thanks for your answer Cassius !

I actually found out why there's a line around the blade. I kept the addition mask but I deleted the subtraction mask (kept the layer though).

I don't know why I used subtraction mask actually, now it works !

Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2016 All Rights Reserved