Filter: All Files Submit Search About IK Hierarchy Chains Before going any further, a word about IK chains. There are three types of chains: Single Chains The single chains are the most basic of chains. A single chain is a straight line with no secondary chain attached. It goes up to the first intersection. Direct Chains A direct chain is a single chain which goes directly to the core (root). All Chains All chains are attached and move together when one part is moved.