Learn how to create a flexible and dynamic spine rig using IK spline techniques in this comprehensive tutorial. Explore the process of model setup, joint placement, and control creation for a realistic spine animation. Master the art of skinning curves, implementing twist controls, and utilizing the Node Editor for advanced rigging. Discover essential troubleshooting techniques, quick fixes, and methods to enhance the rig's functionality. Gain insights into creating a center of gravity control, implementing global controls, and enabling shape deformations for a more versatile character rig.