 Ken Adam had contacted the National Gallery in London to obtain a slide of the picture, painting the copy over the course of the weekend, prior to filming commencing on the Monday.Editor Peter R. Hunt used an innovative editing technique, with extensive use of quick cuts, and employing fast motion and exaggerated sound effects on the action scenes.Hunt said his intention was to "move fast and push it along the whole time, while giving it a certain style", and added that the fast pacing would help audiences not notice any writing problems.