Keylight - inversion Alpha need help

Hello

I have a project to a single problem (for me anyway). I've included a few screenshots to show what I'm against. We have a video where we have a hand of actors grabbing a green ball. The green ball must be transparent, so we can animate a ball for the project. This isn't a problem. However, due to a miscommunication, this was supposed to be shot against a green screen as well (only the ball is green). The end result, I'm looking for is not to show that the hand in the loop with everything being transparent.

Using keylight I can get the hand to be transparent and all I really need to do is to REVERSE transparency. I tried to use the "Invert Alpha effect (see the screenshot of the last), but has not had the desired result." The rest of the sequence IS transparent, but the hand becomes black. I'm sure that it's simple, but I can't seem to find a way to reverse my aplha so that hand becomes visible and everything is transparent.

Any guidance would be appreciated.

Bob

ORIGINAL FILM

Transparent hand using Keylight:

Result by adding the effect "REVERSE ALPHA":

Try this:

1. duplicate the layer.

2. Select the copy above, pre make up (Ctrl + Shift + C on Windows, command + shift + C on a Mac) with the second option in the dialog box (move all attributes to the new comp)

3. Select the copy below, delete all the effects. Set the mode of matte (next to the blending modes) to reverse Alpha.

The reason why you write before the top layer is that, in a matte, a layer is struck by the information transparency (or luminance) to the next higher layer. However, at the time wherever matte questioned the top layer, the Keylight effect has not yet provided images. Using them, you are making sure that AE baked all effects applied to that layer before the layer below application punch by it

Tags: After Effects

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