Inverse Kinematics & Forward Kinematics When a modeller finishes building a character, to animate the same, first we need to Rig the character. Rigging animation is a process where we bind the character with skeletal joints and controllers which allows us to pose/move the character. The terms ik and fk refer to the most efficient Rigging Animation Techniques. As an animator, you need to know the best and most efficient ways to accomplish an animation. Let’s take a simple look at what IK and FK are.