Originally Posted by DRN94
Only certain scenes in 3D movies are shot in 3D. Usually action scenes or visually intensive scenes are filmed in 3D. Talking scenes or archived footage and things of that nature will be 2D. Very few movies I'd imagine are 100% shot in 3D. It's incredibly expensive and unnecessary to have an entire movie shot in 3D so it's only used in certain scenes that would benefit from it.
Whoah! Sorry, but this is very much not true.
There are basically 3 types of 3D films currently:
1) Films shot completely in 3D: All live-action material involving actual filming is shot in true 3D using stereoscopic cameras. This includes "talking" scenes. Any CGI effects that are added are rendered in true stereoscopic 3D. The final completed film is 100% 3D.
2) Films converted in 3D: These are either newer films that were shot in 2D first (like Star Trek:Into Darkness and Pacific Rim) and then converted afterwards to 3D, or older films that were never originally intended to be seen in 3D (like Titanic). Early/cheaply-done 3D conversions look terrible, like Clash of the Titans for example. The best conversions however, like Jurassic Park, Titanic, and Pacific Rim, can look outstanding when converted, and may even look better than some natively-shot 3D films. The final completed film is 100% 3D.
3) Hybrid films: This is when a portion of the film was shot in 3D, and the rest was converted to 3D later in post-production. The CGI may be rendered in true 3D, or it may also be converted. Some films like Transformers 3 are hybrids, seamlessly blending true natively-shot 3D and converted footage. The final completed film is 100% 3D.
With older 3D films from the 50's through the 80's, 100% of the footage was shot in true native 3D, as it was impossible back then to convert films to 3D. These days, many films are still shot 100% true native 3D, and many are also hybrids or conversions. In the end, the finished film will always be 100% 3D
. The quality may certainly vary, depending on many, many factors, but movies are not released "partly" in 3D. I'm not sure where you heard that "talking" scenes in films are 2D, but it's completely false.
There are a number of reasons why not all 3D looks great. There are many stereoscopic cameras out there, many developed specifically just for filming a particular movie. Different cameras have different strengths. The way the camera is adjusted and used during filming can make a huge difference in the final film. But the idea that "talking scenes" aren't filmed in 3D is very much false.