M u s c l e s

What's the big idea?
are deformation controls made out of bones (and they look the same as bones except that they are blue).  One difference between Muscle Bones and real bones is that real bones cause the movement of bones, whereas with Muscle Bones, it's the bones they're connected to that cause the movement.  Visually, the results are the same.

The Muscle works by defining a  connection point (or "target"), usually a null or another bone. This connection point and the pivot point of the Muscle itself can be thought of as the tendons connecting a muscle to two bones. When these two points move closer together the muscle bone scales and rotates to stay in contact with the connection object.  So there.

The blue bone in this animation is a muscle.

How to add muscle--without breaking a sweat:
Besides the FlexMotion method (see bottom of page), muscles can be created in a few ways:

Helpful hints and information:
Muscles can also be made with the Squash & Stretch feature of FlexMotion.  Just set up the bones and apply a FlexMotion curve, then set the Match Curve to  Absolute Length or Uniform Curve Segments, turn on Scale Children Xform, and set the Elasticity to Squash & Stretch.  This type of muscle is especially useful for things like mouths and eyebrows.

Additional Information:  Bone block      Muscle Bone Tutorial

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