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Invisible hand moving body

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Andrea Gianfreda
Invisible hand moving body
on Feb 4, 2010 at 6:15:59 pm

Hi guys, I've a problem.

I have to make a video of a girl where a particular of her body is moved by an invisible hand. I thought a special glove made of green and use the chroma-key to remove the hand but I don't think this will work.

Any ideas?

I'm sorry if I can't explain further myself, there could be minors but I'll try to explain better if you decide to help me.


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Michael Szalapski
Re: Invisible hand moving body
on Feb 4, 2010 at 6:53:16 pm

Right...
If you're saying what I think you're saying, no; just using a green hand will not work. All you would end up with is a hole in the footage. It's not like chromakeying is an x-ray. You would need something underneath to see.

Is this part of her body covered? If it is, you could just have something under her clothing that moves it. If it's bare, it's going to be a lot more difficult to hide whatever it is you're moving it with.

As with many things, doing the effect practically will look a lot better than trying to do things digitally. Depending on how her body is structured, it may be possible to use some invisible wires attached to a small sling that's concealed by her body.

Think through framing and how to hide things by the camera angle.

If the camera is locked off on a tripod and the actress isn't moving around a lot you could shoot a clean plate without things moving and then just have something underneath her body part pushing upward. Then you just mask out the object (or make it green and do a chromakey) so it shows the footage underneath. This will require some practice and testing to get it to look right. The shadows may prove especially difficult.

You could also look into using some of AE's distort features like Liquify and just moving things that way without ever having her move on set.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Andrea Gianfreda
Re: Invisible hand moving body
on Feb 4, 2010 at 7:40:35 pm

That's what I tought... a hole into the footage.

I've added you on Facebook so I can explain better myself. I could do this right here but I don't know if it's accepted... it's not pornography or something explicit.


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Dave LaRonde
Re: Invisible hand moving body
on Feb 4, 2010 at 8:55:37 pm

[Andrea Gianfreda] "I don't know if it's accepted... it's not pornography or something explicit."

If that's the case, put it here. That way, more people can get their eyes on it. They might offer different ways to do it, too.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Andrea Gianfreda
Re: Invisible hand moving body
on Feb 4, 2010 at 9:58:32 pm

Thanks Dave, that was what I wanted to hear.

[Michael Szalapski]"Right...
Is this part of her body covered? If it is, you could just have something under her clothing that moves it. If it's bare, it's going to be a lot more difficult to hide whatever it is you're moving it with.

As with many things, doing the effect practically will look a lot better than trying to do things digitally. Depending on how her body is structured, it may be possible to use some invisible wires attached to a small sling that's concealed by her body.

Think through framing and how to hide things by the camera angle.

If the camera is locked off on a tripod and the actress isn't moving around a lot you could shoot a clean plate without things moving and then just have something underneath her body part pushing upward. Then you just mask out the object (or make it green and do a chromakey) so it shows the footage underneath. This will require some practice and testing to get it to look right. The shadows may prove especially difficult.

You could also look into using some of AE's distort features like Liquify and just moving things that way without ever having her move on set."


Well the effect will be repeated twice: once for the upper zone (bared) and once for the lowest (covered).
The first effect is what I've asked for: use an invisible hand to move her naked breast. I could use a wire sticked with some sellotape and then rotoscope the footage removing the wire with a mask? This could allow me to move her body with the smallest encumbrance.

The second effect should do the same raising her clothes making them arised from one part.


"If the camera is locked off on a tripod and the actress isn't moving around a lot you could shoot a clean plate without things moving and then just have something underneath her body part pushing upward. Then you just mask out the object (or make it green and do a chromakey) so it shows the footage underneath. This will require some practice and testing to get it to look right. The shadows may prove especially difficult."


I havn't understood this passage... I'm not very pro with AE :D

By the way this scene should be run by night with a really low-key.

PS: I have to get something like "Paranormal Activity" :P


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Michael Szalapski
Re: Invisible hand moving body
on Feb 4, 2010 at 10:17:23 pm

I agree with Dave, in the words of Rick Wise in our Cinematography forum:
While I am flattered that my advice is sometimes useful, [contacting off the forum to solve a] problem is counter productive. When someone posts a problem, and others find solutions, that's a learning process for everyone, not just the poster. That simple reality is why the forum is so useful to so many people. When you talk directly to me off-forum, you remove the learning for all the others. Plus, other people may have a better solution than I do. There is still so much I don't know.
Also, I prefer to keep my work (After Effects) and my social/personal life (Facebook) separate.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.


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Tony Silva
Re: Invisible hand moving body
on Feb 4, 2010 at 10:32:20 pm

I don't know if it'll help at all, but your welcome to use my hand ;)


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