While animators focus on acting, simulation programmers create motion that makes scenes feel alive and believable. Some simulations –– hair, fur, and clothing–– respond to the way a character moves. Other simulations recreate natural phenomena, such as fire or water.
Simulation technical directors use computer programs to create effects and to move hair and clothing. Programmers start with a physics-based simulator, but then they fine tune it to balance believability with the artistic needs as well as the time it takes to compute the simulation.