Motionbuilder Tutorial - 18: Spline Ik Guide

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

Drag the from the Asset Browser’s Constraints folder into the viewport. Define the Chain : Motionbuilder Tutorial - 18: Spline IK

: For complex characters, these controls can be added to a Character Extension (like a "Tail" extension) to ensure they are properly recognized and baked with the rest of the control rig. Best Use Cases : Ideal for any appendage that needs to

: Perfect for automating the physics-like movement of hair, whips, or mechanical cables. Motionbuilder Tutorial - 18: Spline IK Best Use Cases : Perfect for automating the

: 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.

: 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.