Once the static elements have been set, the 3D artist applies motion to them. This process, called animation is performed by setting keyframes. In order to animate a ball falling, the animator would set the first key frame at say 0th second with the ball’s position at the initial top position. He would set the next key at say 5th second with the ball’s position touching the ground. The 3D animation software interpolates the ball’s falling action between the 0th and 5th seconds. The animator can customize the interpolation behavior using graphs or by setting intermediate keys.

In Character animation, similar principles are applied. The skeleton will be animated by the animator and the 3d mesh skinned to the skeleton get’s animated automatically. Character animation is often aided by plug-in tools (e.g.: biped) that has been created specifically for creating character animation sequences like walking or running cycles. The various scene elements, cameras and lights are animated using basic key-frame animation, based on the story board requirements.

Once the scenes are animated, it will undergo a process called rendering, in which the 3d representation is converted to a video format, which can be read and edited using professional video editing software.

Editing and mixing:

The rendered scenes are imported into video editing software and edited. In the case of movies where the human characters need to interact with an animated character, proper mixing is done at this stage, though the 3D scene creation would have been done with that aim in mind, using techniques like motion tracking.