Aescripts - Unmult v1.2

Aescripts - Unmult v1.2 Win/Mac

https://aescripts.com/unmult/

Remove black to add an alpha channel to a lighting effect. The UnMult plug-in generates an alpha channel for a lighting effect, allowing it to be applied to your footage using the Normal transfer mode in After Effects or another program. It does this by un-premultiplying the RGB to reach full saturation and then attenuating the alpha by the same amount.UnMult assumes your lighting effect (a lens flare, for example) is applied to a black solid with a fully opaque alpha channel. After applying UnMult, the lighting effect may appear unchanged, but the pixel values will have been modified to use a semi-transparent alpha.