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Posted by nobody special on 11/01/06 04:40
Well, if using footage or stills of ral people and places, you cut them
apart and sort them into layers using photoshop first, and you'd have
to build or clean-up existing backgrounds if you wanted to use them,
filling-in the missing areas where objects used to be by using clone
brush or etc.
To keep it simple, your pop-uo book example would probably flatten all
elements but the frontmost "hero" element and you would apply them to
the "page" of the book. The separate hero element, say, a character
from the story, is put on it's own layer and alpha keyed. You have to
anchor it at some point, usually the feet, as the hinge point, then
apply DVE moves from there. The character pop-up is another flavor of
page turn, is how you can look at it.
You get into additional problems if the shot is to first turn the
page and then have the pop-up animate out of that. Means you'd have to
break the shot into two match-framed pieces if using Motion or a flat
compositor approach, otherwise you'd have to nest one set of animation
moves inside another, creating monstrous complexity. Frankly, while
this is completely doable in AE or Combustion or Shake, (by someone
better than me) I think it may be a wee too much to ask for Motion to
handle simply, and my own preference might be to use a 3-d animation
program like lightwave, maya, or max to put this scene together, makes
the lighting and positioning easier for me.
You would still start with pieces cut up in photoshop. The difference
is you can create invisible planes in the same shape as the cutouts and
texture map the cutouts to them like they were decals, then keyframe
away. Using bones and parenting, it would be relatively easy to
animate flipping thru several pages of pop-ups that way.
So much of the complexity of this gag depends on the specific shots and
angles. If for example your virtual camera is looking down onto an open
book from above, it simplifies a lot of the animation moves by limiting
the z-axis action.
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