Discuss in detail about rendering

Computer animation uses a technique termed as avars (animation variable) where starting point is generally a series of stick figures; for example Toy Story used over 700 avars(1 avar = position of every feature e.g. mouth). Successive sets of avars control all movement of animated character. Once stick model is moving in required way, avars are incorporated into full wire frame models. Ultimately, surfaces are added requiring a process known as rendering (i.e. turned into a realistic image).