Abstract
The simulation of human massive crowds play an important role in real-time application such as games and walkthrough system. This kind of applications can provide all immersive feeling of life into the static scene and enhance the reality of the system. In recent years, there are many significant research and techniques have been developed, mainly focus on the entertainment industry for both real-time and non-real time rendering. This paper will give all overview oil crowd behavior in real-time crowd simulation. The work will also cover numerous crowd modeling and rendering techniques.