[Morgan Wable-keene]

Check out Neo’s Clip Archive. Anywhere else, this kind of thing would actually cost money. I would suggest trying to learn how to make it yourself, though. The balance between visual chaos and sophisticated, glowing coordination of shapes can be hard to replicate (I still haven’t mastered it) but it would behoove you to at least try.

[Morgan Wable-keene]

So, what you’re saying is, you have a stable shot of someone walking, and you want to use a shot of the background from the same angle as base for what gets removed from the walking shot, or, greenscreen but keying out background instead of a color?

I’m no expert, but I think this falls under the category of “things that obviously really should exist but don’t and it’s hard to understand why they don’t”, which sadly, many special effects fall under.

If I understand your problem correctly, I think your best bet is either hand-rotoscoping the person out of the shot, or just using a greenscreen.