The editing, the color grading, the music, the acting all contribute to the effect and contribute to its full success, or sometimes its failure. It doesn’t matter that the heartbreaking farewell scene between the human and the alien was shot on a green screen by an actor without a partner, as long as we are moved! It is the spectator, and only the spectator, who feels the effect, validates it and transforms it into a lived emotion. It is for his gaze that dozens and sometimes hundreds of artists have worked for many months. Discover, through the history of cinema, how the 7th art is constantly inventing new effects and playing with the limits of our perception to offer ever more extraordinary illusions… and ever more undetectable! In this movie theater, observe how the special effects play out from the viewer’s eye in several films such as Cabbage Soup, The Wall Pass, Nana, The Testament of Orpheus, or even Star Wars.