Film editing has developed vastly over the years and is the most important part of film production. Early techniques included in-camera editing where the sequence was shot and edited in order. Following the action technique gives the illusion that the audience is participating by using a camera mounted on a dolly. Multiple points of view shows different characters' perspectives at the same time to build tension. While editing techniques have advanced greatly with digital tools, seamless editing aims to tell the story smoothly without drawing attention to the edits.