Reveal layer

[Mylenium]

Animated masks plus the Roughen Edges effect.

Mylenium

[Pour Myl

[Steve Roberts]

Indeed.

Maybe also feather the masks, and/or use gradient wipe with a precomped fractal noise layer as the gradient map.

[Reloaded]

Yes there is and it’s easier than it looks.
It’s white paint droping on whater with some black paper (or whatever)under it, that you can record with any video camera, then use this video as a track mattte. At Transfer mode of the video you want to reveal, select “Alpha Matte “paint video you recorded””.
That’s all.

I hope it helps.

[Sal]

Thanks to all of you for your suggestions! 🙂

[Steve Roberts]

“Practical” is the new “CG”.