4.3 Animation Generation Given mocap data, the skeleton mapping template and the new shape model with the mocap skeleton, we use MotionBuilder to generate 3D animation sequences. We firstly load the new shape model into MotionBuilder. With the mapping template, the skeleton can be directly recognized by MotionBuilder. After importing a mocap file, the shape model can move seamlessly following the mocap motion, shown in 7. Additionally, we can “characterize” the skeleton inside the shape model, which incorporates the FK/IK optimization algorithms and physical constraints predefined by software. This step employs MotionBuilder’s built-in features to improve some noisy mocap motion. The visual human motion sequences can be recorded by freely placed virtual cameras.