3D animation is not commonly used in documentary films because it is typically more expensive and time-consuming to produce than other types of visual effects.

Visual effects can be used in documentary films to achieve a variety of goals, including enhancing the realism of the film, creating a more immersive experience for the viewer, and making the film more visually appealing.

Stop motion animation is not a common technique used to create visual effects in documentary films because it is typically more time-consuming and labor-intensive than other techniques.

Compositing is the process of combining two or more images or video clips into a single image.

Stop motion animation is not a common type of visual effect used to create the illusion of movement in documentary films because it is typically more time-consuming and labor-intensive than other techniques.

Keying is the process of removing a background from an image or video clip.

Motion blur is not a common type of visual effect used to create the illusion of depth in documentary films because it is typically used to create the illusion of movement.

Motion tracking is the process of tracking the movement of an object in an image or video clip.

Stock footage is not a common type of visual effect used to create the illusion of realism in documentary films because it is typically used to supplement or replace footage that cannot be obtained.

Animation is the process of creating a moving image from a series of still images.

Freeze frame is not a common type of visual effect used to create the illusion of time in documentary films because it is typically used to create a dramatic effect.

3D modeling is the process of creating a realistic-looking digital model of an object or character.

Depth of field is not a common type of visual effect used to create the illusion of space in documentary films because it is typically used to create the illusion of focus.

Post-production is the process of adding visual effects to a film or video.

Music is not a common type of visual effect used to create the illusion of emotion in documentary films because it is typically used to create a mood or atmosphere.