Collage film is traditionally defined as, “A film that juxtaposes fictional scenes with footage taken from disparate sources, such as newsreels.” Combining different types of footage can have various implications depending on the director’s approach. Collage film can also refer to the physical collaging of materials onto filmstrips.
The use of CGI, or computer-generated imagery, can be considered a form of collage, especially when animated graphics are layered over traditional film footage.