Some situations may require this kind of fine tuning that may not be possible using Inverse Kinematics alone.ДЇor example, the following figure shows FK effectors on each finger of a character in MotionBuilder. Please see the Autodesk Creative Commons FAQ for more information. Usually, the animator must define these complex rules for all of the joint motions on a character, but in MotionBuilder, the work is done for you by the Control rig.ДЇorward Kinematics gives you complete control over individual bones in the skeleton, letting you manually position each individual Except where otherwise noted, work provided on Autodesk Knowledge Network is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Joints in an FK chain have a parent-child relationship in which the child node (B) follows the behavior of the parent node If only the elbow (B) is rotated, only the wrist (C) and hand (D) move, but not the shoulder (A). Which is why, as you will see, this tutorial is about creating user-friendly tools outside of MotionBuilder. Everyone seems to agree: It is very hard to make user-friendly tools in MotionBuilder. In the arm FK chain, rotation of the shoulder joint (A) is propagated down through the elbow (B) and wrist (C) to the hand One of the biggest complaints about MotionBuilder, from a Tech Artist/Animator standpoint is itвЂ™s Python implementation.

Motionbuilder 2014 tutorial