Coppola was insistent that he did not want to use any kind of contemporary special effects techniques such as computer-generated imagery when making the movie, instead wishing to use antiquated effects techniques from the early history of cinema, which he felt would be more appropriate given that the film's period setting coincides with the origin of film. He initially hired a standard visual effects team, but when they told him that the things he wanted to achieve were impossible without using modern digital technology, Coppola disagreed and fired them, replacing them with his son Roman Coppola. As a result, all of the visual effects seen in the film were achieved without the use of optical or computer-generated effects, but were created using on-set and in-camera methods. For example, any sequences that would have typically required the use of compositing were instead achieved by either rear projection with actors placed in front of a screen with an image projected behind them, or through multiple exposure by shooting a background slate then rewinding the film through the camera and shooting the foreground slate on the same piece of film, all the while using matting techniques to ensure that only the desired areas of film were exposed. Forced perspectives were often employed to combine miniature effects or matte paintings with full-sized elements, or create distorted views of reality, such as holding the camera upside down or at odd angles to create the effect of objects defying the laws of physics.