how to key that???

[JoshKirk]

I would just do this (this is how my layers would be set up)

Hand
-Key
-Basic Rotoshape to isolate the hand from body
3d element
-alpha channel
Body
-Key

[Kai01W]

Hi to all keying specialists....

I have following situation:
best seen here.....

Key your hand in a way that the borders are ok. Even if you might get some holes further away from the edges. These are easy to roto.
Why is your sphere green? If your CG object is going to be bigger there might be no need for this. In that case I'd rather taken a ball roughly the same color as the cg object for less spill problems. Might not be so critical in that case but maybe in others. Sometimes people think that anything fx related needs to be green or blue. Like putting green on the screen of an empty tv that was supposed to get its picture in post. There was nothing in front of it that needed to be seperated...

-k

[tomtm]

Hello,
Thanks for all inputs...

The sphere is green, so that we maybe can also track smaller objects, but than we have to
paint also green trackerpoints, with a hardware ultimatte easy to key......
The sphere is that big, because we need information to generate 3D motion.

Anyway, I will check out your advices and hope to show you some results soon.

Greets Tom

[JoshKirk]

Dont know if this is what you are talking about but from what I understand this is what you are looking for correct?

[/url]

http://img228.imageshack.us/img228/3226/keyjrsetup1vj.jpg[url="http://img228.imageshack.us/img228/3226/keyjrsetup1vj.jpg"] (http://img228.imageshack.us/img228/3226/keyjrsetup1vj.jpg)

[tomtm]

Hi to all,

Thank you ver much for all inputs.
I maybe found a very good solution for that, but it needs some
very datailed tracking results.....

I will show, when I have finished the product...

regards
Thomas

[jussing]

I don't understand the problem.....

The sphere is green BECAUSE this will key the hand perfectly.

No need for masks or roto, just key in the sphere just like the background (and make it exactly the same size as the original sphere, not too big or small).

(you WILL need masks or roto for the tracking dots on the sphere, of course)

- Jonas

EDIT:
I'd set it up like this:

Body
- Key
Sphere
Background


Or, alternatively:


Comp1: Matte extraction:
Body
- Key

Comp2: Main composite
Comp1 (not visible)
Sphere (using above INVERSED as alpha)
Comp1 (not visible)
Body (using above as alpha)
Background


(JoshKirk's suggestion will work fine, too)

[payton]

hi tomtm,
dont know if you still need help for that problem...
but here is my attempt.

1. i keyed the foreground with keylight.
2. added the sphere in front of the foreground
3. added another instance of the foreground in front of the spere
3b. rough garbage mask for the hand
4. keyed the top layer with linear color key
5. another instance of the linear color key for the top layer to bring back in wanted colors
6. used the top layer as a trackmatte for the foreground.
7. matte choker to improve the result

works good for me (with this low-res version)...

here´s the result...

http://www.rassnik.de/key2.jpg

and here the project file...

http://www.rassnik.de/key.zip

cu,
payton

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