There is a reason that major films have used motion capture in their animation process ━ they have huge budgets. To accomplish the highest quality, accurate video footage, it usually requires many cameras and an environment conducive to collecting motion data. The well-known 3D characters created by motion capture were made possible in a studio, fully equipped with hundreds of expensive, high resolution cameras.
Even the greatest 3D animators struggle with mastering realistic 3D facial animations. This is because the complex muscle system that controls numerous, subtle facial expressions is hard to emulate using traditional 3D animation methods.
Methods like rigging and morphing are often time-consuming and inefficient. As a result, some animators have tried to use motion capture, also called mocap. Motion capture for facial animation uses a system of cameras, and sensors, and wires (in some cases) to capture the motions of real people and transfer them onto a 3D character model.
Major, renowned 3D animated productions like Avatar and characters like Gollum from Lord of the Rings were created using motion capture technology. Furthermore, the technique has transformed computer animation, primarily by making it possible to transfer human emotions onto a 3D character. However, motion capture has its own set of challenges and is not suitable for every situation.