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One of the fun bits about
the Cats and Lizards project is designing
creature anatomy. I needed to get pretty specific about designing
the internal anatomy since so many characters of both species get
chopped up, recycled for parts, or end up as rotting undead late
in the story.
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A couple visits to the Natural History Museum gave me some good
building blocks to work with. The arm structure of a giant ground
sloth gave me the power and limited maneuverability I was looking
for, and the pelvic structure of the tyrannosaurus gave a good basis
for suspension.
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After that it was a matter of balancing everything together. This
early sketch had a catlike skull and limbs on a fishlike spinal
structure.
Later I moved the center of gravity into the lower back to give
more precise two-legged balance, to change the overall proportions
and posture to be more frog-like, and to replace catlike features
with reptilian ones.
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The lizard's skull and face were a lot of fun - due to the lizard's
large size (fifteen to twenty-five feet in length), the skull needed
a number of fossae to keep from becoming too heavy. Fortunately
there are plenty of good examples to draw from among the birds and
dinosaurs.
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