Postmodernist film attempts to articulate postmodernism (its ideas and themes and methods) through the medium of film. Postmodernist film attempts to subvert the mainstream conventions of narrative structure, characterization and destroys (or, at least, toys with) the audience's suspension of disbelief. Typically, such films also break down the cultural divide between high and low art and often upend typical portrayals of gender, race, class, genre, and time with the goal of creating something different from traditional narrative expression.
Overview of Postmodernism 
Postmodernism is a complex paradigm of thought, art, philosophy, method. It emerged, initially, as a reaction to high modernism. Modernism is a paradigm of thought and viewing the world characterized in specific ways that postmodernism reacted against. Modernism was interested in master and meta narratives of history of a teleological nature. Proponents of modernism suggested that social/political/cultural progress was inevitable and important for society and art. Ideas of cultural unity (i.e., the narrative of the West or something similar) and the hierarchies of values of class that go along with such a conception of the world is another marker of modernism. In particular, modernism insisted upon a divide between "low" forms of art and "high" forms of art (creating more value judgments and hierarchies). This dichotomy is particularly focused on the divide between official culture and popular culture. Lastly but, by no means comprehensively, there was a faith in the "real" and the future and knowledge and the competence of expertise that pervades modernism. At heart, it contained a confidence about the world and humankind's place in it.
Postmodernism attempts to subvert and resist and differ from the preoccupations of modernism across many fields (music, history, art, cinema, etc.). Postmodernism emerged in a time not defined by war or revolution but rather by media culture. Unlike modernism, postmodernism does not have faith in master narratives of history or culture or even the self as an autonomous subject. Rather postmodernism is interested in contradiction, fragmentation, and instability. Postmodernism is often focused on the destruction of hierarchies and boundaries. The mixing of different times and periods or styles of art that might be viewed as "high" or "low" is a common practice in postmodern work. This practice is referred to as pastiche. Postmodernism takes a deeply subjective view of the world and identity and art, positing that an endless process of signification and signs is where any "meaning" lies. Consequently, postmodernism demonstrates what it perceives as a fractured world, time, and art.
Postmodernist Film 
Postmodernist film like postmodernism itself is a reaction to modernist cinema and its tendencies. Modernist cinema, "explored and exposed the formal concerns of the medium by placing them at the forefront of consciousness. Modernist cinema questions and made visible the meaning-production practices of film."  The auteur theory and idea of an author producing a work from his singular vision guided the concerns of modernist film. "To investigate the transparency of the image is modernist but to undermine its reference to reality is to engage with the aesthetics of postmodernism."  The modernist film has more faith in the author, the individual, and the accessibility of reality itself than the postmodernist film.
Postmodernism is in many ways interested in the liminal space that would be typically ignored by more modernist or traditionally narrative offerings. The idea is that the meaning is often generated most productively through the spaces and transitions and collisions between words and moments and images. Henri Bergson writes in his book Creative Evolution, "The obscurity is cleared up, the contradiction vanishes, as soon as we place ourselves along the transition, in order to distinguish states in it by making cross cuts therein in thoughts. The reason is that there is more in the transition than the series of states, that is to say, the possible cuts--more in the movement than the series of position, that is to say, the possible stops."  The thrust of this argument is that the spaces between the words or the cuts in a film create just as much meaning as the words or scenes themselves.
Postmodernist film typically has three key characteristics that separate it from modernist cinema or traditional narrative film. 1) The pastiche of many genres and styles. Essentially, this means that postmodern films are comfortable with mixing together many disparate kinds of film(styles, etc.) and ways of film-making together into the same movie. 2) A self-reflexivity of technique that highlights the construction and relation of the image to other images in media and not to any kind of external reality. This is done by highlighting the constructed nature of the image in ways that directly reference its production and also by explicit intertextuality that incorporates or references other media and texts. The deconstruction and fragmentation of linear time as well is also commonly employed to highlight the constructed nature of what appears on screen. 3)An undoing and collapse of the distinction between high and low art styles and techniques and texts. This is also an extension of the tendency towards pastiche and mixing. It typically extends to a mixing of techniques that traditionally come with value judgments as to their worth and place in culture and the creative and artistic spheres.
Lastly, contradictions among technique, values, styles, methods, and so on are important to postmodernism and are many cases irreconcilable. Any theory of postmodern film would have to be comfortable with the possible paradox of such ideas and their articulation.
Examples of postmodernist film and filmmakers 
There are many examples of postmodern films and filmmakers. Blue Velvet, Pulp Fiction, Blade Runner, Ghost in the Shell, Who Framed Roger Rabbit?, The Royal Tenenbaums, Sex, Lies, and Videotape, Paris, Texas, Monty Python and the Holy Grail, Thelma and Louise, Fight Club Mulholland Drive, The Matrix trilogy and Memento are just a handful examples of postmodern cinema in practice.
The Coen brothers, Michael Haneke, David Lynch, Quentin Tarantino, Wes Anderson, Peter Greenaway, François Truffaut, Charlie Kaufman, Jean-Luc Godard, Paul Thomas Anderson and Christopher Nolan are a few of the most popular and well-known purveyors of postmodern cinema. The majority of their work demonstrates many of the principles of postmodernist film-making.
Specific postmodern examples 
Blade Runner 
Ridley Scott's Blade Runner might be the best known postmodernist film. Ridley Scott's 1982 film is about a future dystopia where "replicants" (human cyborgs) have been invented and are deemed dangerous enough to hunt down when they escape. There is tremendous effacement of boundaries between genres and cultures and styles that are generally more separate along with the fusion of disparate styles and times that is a common trope in postmodernist cinema. "The futuristic set and action mingle with drab 1940s clothes and offices, punk rock hairstyles, pop Egyptian style and oriental culture. The population is singularly multicultural and the language they speak is agglomeration of English, Japanese, German and Spanish. The film alludes to the private eye genre of Raymond Chandler and the characteristics of film noir as well as Biblical motifs and images."  Here is a demonstration of the mixing of cultures and boundaries and styles of art. The film is playing with time (the various types of clothes) and culture and genre by mixing them all together to create the world of the film. The fusion of noir and science-fiction is another example of the film deconstructing cinema and genre. This is an embodiment of the postmodern tendency to destroy boundaries and genres into a self-reflexive product. "The postmodern aesthetic of Blade Runner is thus the result of recycling, fusion of levels, discontinuous signifiers, explosion of boundaries, and erosion. The disconnected temporality of the replicants and the pastiche of the city are all an effect of a postmodern, postindustrial condition: wearing out, waste." 
Pulp Fiction 
Quentin Tarantino's Pulp Fiction is another popular example of a postmodernist film. The film tells the interweaving stories of gangsters, a boxer, and robbers. The film breaks down chronological time and demonstrates a particular fascination with intertextuality: bringing in texts from both traditionally "high" and "low" realms of art. This foregrounding of media places the self as "a loose, transitory combination of media consumption choices." Pulp Fiction fractures time (by the use of asynchronous time lines) and by using styles of prior decades and combining them together in the movie. By focusing on intertextuality and the subjectivity of time, Pulp Fiction demonstrates the postmodern obsession with signs and subjective perspective as the exclusive location of anything resembling meaning.
- Susan Hopkins (Spring 1995). "Generation Pulp". Youth Studies Australia 14 (3): 14–19.
- Laurent Kretzschmar (July 2002). "Is Cinema Renewing Itself?". Film-Philosophy 6 (15).
- Linda Hutcheon (January 19, 1998). "Irony, Nostalgia, and the Postmodern". University of Toronto English Library.
- Frederic Jameson, Postmodernism and Consumer Society, George Mason University
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- Mary Alemany-Galway (2002). A Postmodern Cinema. Kent, England: Scarecrow Press.
- Beginning Postmodernism, Manchester University Press: 1999 by Tim Woods
- "Reading the Postmodern Image: A Cognitive Mapping," Screen: 31, 4 (Winter 1990) by Tony Wilson
- Creative Evolution
- "Fight Club and the Post-Modern Dilemma of Mankind". jademyst.com. Retrieved 2012-01-19.
- "Ramble City: Postmodernism and Blade Runner" October, 41 (1987) by Giuliana Bruno