Problem with Superimposing

Hello,
I have a clip, where I superimpose a fireworks.
The problem is, the firework is in the foreground.
Is there any way simple way to put it in the background other than masking the foreground?
I place the fireworks above the main video and below the main video. Both showed the fireworks is "leaking" into the main video clip. I tried "add" and "screen" they both do the same.

Thank you for a suggestion.

Dorian

You do need to use masking of the foreground.

I happened to do that with BorisFX last year. Works very well with the integrated Mocha for masking.

thank you,
I thought there might be an easier way!

Dorian

How can your software know where the foreground ends?

You may be able to use a luminance mask if there is only the sky to be masked.