Particle system is a very commonly used system in computer graphics. It can be used to simulate
many objects in the real world, such as liquid simulation, smoke simulation and so on. Now, a
new method called welding simulation has been developed. In this simulation, it needs to give the
particle system a metal-like surface. Therefore, in this thesis, we developed a render model which
can make a particle system have a metal-like surface. This render model can be used in welding
simulation application and also for other applications based on particle systems with metal-like
surfac
