- Posts: 3
- Joined: Thu Sep 14, 2017 4:38 pm
Yeah so you're seeing an unpremultiplied image there. In a program like AE you always see alpha channels premultiplied, but in nodal compositors like Fusion / Nuke you have to manually premultiply the image somewhere. This gives you the ability to perform operations like color correction in an unpremultiplied state, which is useful in a variety of situations.
Throw an "Alpha Multiply" node in the chain after your channel boolean and take a look at that.
Also, to read up on premultiplication:
https://learn.foundry.com/nuke/8.0/cont ... tions.html
https://www.schoolofmotion.com/blog/premultiplication/