What is Pre-Visualization?

　In recent years, Pre-Visualization, also called Animaticcs, is often used when the huge movie is produced. Pre-Visualization (hereafter, PreViz) : It is the technique for making the scene of movie visible by using the CG before filming. There is an advantage that a director can use the PreViz system for sharing concept with actors and staffs with complex camera-work, that cannot be expressed by the classical storyboard.