Question about the 3D Conversion Process.
Does anyone know how companies actually convert movies filmed in 2D to 3D? I understand that for completely computer generated movies, such as Toy Story, all the information necessary to convert it to 3D is already available and that the conversion process is, more-or-less, fairly straightforward. However, what about films that are already filmed in standard 2D? As far as I understand it, to film "true 3D" requires two slightly different images to be filmed at the same time to create the 3D image. When there is only one 2D image, how is the 3D conversion done? The reviews I have read about 3D movies converted in post production suggest that basically everything in the foreground is given a cardboard cut-out effect, with lots of layers added to give the illusion of depth, but with no "true 3D." Does anyone really know how the 3D conversion process actually works? Thank you to anyone that replies.