電腦成像
"Irréversible" was shot using a widescreen lightweight Minima Super16 mm camera. The film consists of about a dozen apparently unbroken shots melded together from hundreds of shots. This included a 9-minute-long rape and sodomy scene, portrayed in a single, unbroken shot. Computer-generated imagery was used in post-production for the penis in the rape scene. Another example is the scene where Pierre beats up a man's face and skull to pulp with a fire extinguisher. CGI was used to augment the results, as initial footage using a conventional latex dummy proved unconvincing. During sixty minutes of its running time, the film uses extremely low-frequency sound to create a state of nausea and anxiety in the audience.