After effects masking, grey line appears

Participant ,
Dec 31, 2021 Dec 31, 2021

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I add a closed eye face layer on top of the opened eye face layer so if i want to do a blink effect i can move the mask path down. But i see the grey thing when i mask, Why does this happen actually? I did parenting so it can follow the opened eye face layer
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Participant , Jan 01, 2022 Jan 01, 2022
I just fixed the issue. I have two layers the close and opened eye. Both has drop shadow and it cause the grey line to appear

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Adobe Community Professional ,
Jan 01, 2022 Jan 01, 2022

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That happens when your mask isn't exactly coinciding with full pixels and AE's sub-pixel sampling kicks in. The simple solution may be to switch layers to draft quality, effectively turning off sub-sampling. Otherwise you have to make an effort to place your masks more precisely.

 

Mylenium

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Participant ,
Jan 01, 2022 Jan 01, 2022

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I just fixed the issue. I have two layers the close and opened eye. Both has drop shadow and it cause the grey line to appear

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