[Sebastian Von wachenfeldt]

Hello!

I’m sorry to say, this did not work at all.
Then again I’m completely clueless about keying.
I also don’t understand why this would even have to be done?

I have my stock footage of film grain, a video file, I put it on top of my own footage and choose Overlay in blending modes. Now I have no idea why to choose Overlay -it’s the recommendation of the one that provided the package of film grain- nor do I know what Overlay actually does to the clip, but that doesn’t really matter – it works! The effect that Overlay gives me here is that somehow anything that is under this film grain clip will now “shine through” the upper layer of film grain, or in another sense: have the film grain applied to it.
But not when it comes to a .PNG! Why?
Not only is it extremely frustrating but also seems illogical? Choosing Overlay as blending mode on my film grain will automatically seemingly “attach” it to any footage that is beneath it in the timeline. It’s so simple. Why doesn’t it work on .pngs???

(So, mainly, I would just be terrible happy if you could help me out!
But I’m also curious about the science behind it… if you would be interested in schooling me) ☺

Thank you very much!