 While technical storyboards can be helpful, optically-correct storyboards may limit the director's creativity.In classic motion pictures such as Orson Welles' "Citizen Kane" and Alfred Hitchcock's "North by Northwest", the director created storyboards that were initially thought by cinematographers to be impossible to film.Such innovative and dramatic shots had "impossible" depth of field and angles where there was "no room for the camera" – at least not until creative solutions were found to achieve the ground-breaking shots that the director had envisioned.