7. Save your scene!
Figure 12.39 Assigning weight maps
to bones alleviates any problems of
bone movements influencing areas of
the model they shouldn??™t.
Note
Note
The subtlety of using weight maps with bones is that they confine the influence of bones
to the surface regions you want to deform. For a model like our little penguin, a weight map
for the feet is ideal because the models parts are so close together, unlike a tall skinny alien
or a four-legged animal. If their influence wasn??™t constrained by weight maps, moving any
of those short, tightly packed leg bones could cause unwanted deformations across most or
all of the penguin??™s surface. But as you can see, a simple weight map corrects this problem.
Note that the penguin does not need a weight map for its body or head, because we want
that part of its body (unlike its feet and torso) to deform as a single seamless surface,
rather than as a set of discrete parts. It would hinder the overall look of the character if
its head were clearly articulated from its chest, for instance.When a character like this
turns its head, you want its chest and belly to twist as well.
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