Swedish waterfalls

 

A natural history film or wildlife film is a documentary film about animals, plants, or other non-human living creatures, usually concentrating on film taken in their natural habitat. Such programs are most frequently made for television, particularly for public broadcasting channels, but some are also made for the cinema, medium, in fact, where this genre started almost simultaneously alongside television series.

The cathedral under construction

A 3-D (three-dimensional) film or S3D (stereoscopic 3D) film is a motion picture that enhances the illusion of depth perception. Derived from stereoscopic photography, a regular motion picture camera system is used to record the images as seen from two perspectives (or computer-generated imagery generates the two perspectives in post-production), and special projection hardware and/or eyewear are used to provide the illusion of depth when viewing the film. 3-D films are not limited to feature film theatrical releases; television broadcasts and direct-to-video films have also incorporated similar methods, primarily for marketing purposes.