Forced perspective

The Lord of the Rings is a film that utilises so many camera distortions and editing techniques: from extremely intricate, software and post-production based CGI editing to manual, live situation camera and visual distortions.

See also: http://www.visualnews.com/2013/10/16/vintage-street-scenes-created-using-model-cars-forced-perspective-250-point-shoot-camera/