• Global community
    • Language:
      • Deutsch
      • English
      • Español
      • Français
      • Português
  • 日本語コミュニティ
    Dedicated community for Japanese speakers
  • 한국 커뮤니티
    Dedicated community for Korean speakers

Mask better than green screen - alpha channel?

New Here ,
Oct 10, 2022 Oct 10, 2022

Copy link to clipboard

Copied

Hi,

I have have 2 items, 'front' and 'back', where front is partially obscuring the back.

I want to keep the front image, but use differnt back images.

If this was a simple colid colour, then colour/ultra key with the new items behind would be easy.

If i have the back item as green to cololur key that then show any item, the way i have lighting and shadow, its doesn remove that so not a clear mask. 

I think instead of green screen, i could use an alpha mask if i coudl create on myself. is, i coudl have the items to keep in white, item to remove/be replaced in black, and if i coudl create this and import as the alpha map for a video, then that would remove the area i dont want, and in another layer can put in new items i do want. 

Hopefully that makes sense.

 

Summary:

1. dont know how to remove shadow off eg a green screen item

2. think alpha could be used and can easily make my own, but cannot see how i can import my own alpha channel and use that instead of the current alpha in a video.

 

many thanks  

 

 

 

TOPICS
Effects and Titles

Views

35

Likes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Community Expert ,
Oct 10, 2022 Oct 10, 2022

Copy link to clipboard

Copied

That would be a job for rotoscoping in After Effects:

https://helpx.adobe.com/after-effects/how-to/rotoscope-subject.html

 

Likes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
New Here ,
Oct 10, 2022 Oct 10, 2022

Copy link to clipboard

Copied

Thanks, this is usefull. 

Do you know how to replace an alpha mask with your own alpha mask?

Likes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines
Community Expert ,
Oct 11, 2022 Oct 11, 2022

Copy link to clipboard

Copied

LATEST

Remove from where?

Likes

Translate

Translate

Report

Report
Community guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
community guidelines