It is optimized for all joints, from shoulder, elbow, and knee, to fingers. Reallusion launched a free rigging tool AccuRIG, which allows you to automatically create skeletal rigs for humanoid 3D models. The tool can be used with ActorCore - its 3D asset library for mocap animations - and other software, like Unreal Engine, Unity, Blender, iClone, Omniverse, Maya, 3ds Max, MotionBuilder, and Cinema 4D.