 | | | Lip Sync | Lip Sync 2004-04-29 - By Stefan Andersson
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Matt Morris wrote:
> As much as that might simplify things, you really need the extra control
> that having a seperate bone for the jaw gives. Its all about subtlety at the
> end of the day. It greatly increases the range of expression.
>
> The blend shapes also become really obvious in the animation without it, as
> the animation of the points is linear between them, but with the jawbone it
> moves in arcs which is more natural.
As Matt says it helps with getting the arcs and deformations more
natural. However (if I remember correctly) Softimage shows lipsync with
shapes in the mixer as you would do an edit with a editing program. This
I don't recommend that anyone does. Or, you should NEVER set keyframes
in the mixer, all shapes should at all times be linked to a custom
parameter set. It's a big "no-no" with setting keys in the mixer when
you are doing shape animation.
I'm using the bone rotation (single chain with IK) a lot these days
whenever I'm doing facial animation. It's helps with the arcs and also
to fake some squash and strech motion.
I can recommend a book by Jason Osipa called "Stop staring" which covers
this area quite well (even though it's aimed towards maya users).
http://www.jasonosipa.com/JasonOsipa_Main.htm
very good book. And also for basic shapes (according to Aardman) I
recommend that you study these shapes
http://www.cgnetworks.com/stories/2002_9/aardman/morph.jpg
They are from the shortfilm "deadline".
wow... that was a lot for some comments on a webbased promotion video :)
best regards
stefan andersson
--
Stefan Andersson
Freelancing Pixel Abuser
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