Motionbuilder Tutorial - 18: Spline Ik Access

: Ensure your joint chain is exactly perpendicular to the Y-axis ; otherwise, the constraint cannot be initialized. Apply the Constraint : Select the bones in your scene.

Enable and click Snap to activate the constraint and bind the bones to the curve. Advanced Control Features Motionbuilder Tutorial - 18: Spline IK

: You can adjust the Control node twist axis , Reverse twist , and Twist interpolation settings to manage how the skeleton rotates along its length as the curve bends. : Ensure your joint chain is exactly perpendicular

: While MotionBuilder generates a default curve, you can also use a custom 3D Curve from the Elements folder of the Asset Browser for more specific pathing. Advanced Control Features : You can adjust the

Drag the from the Asset Browser’s Constraints folder into the viewport. Define the Chain :

: Ideal for any appendage that needs to deform in a serpent-like or "gooey" manner, which standard bipedal rigs can't handle.