Films re-released in 3D

[dave50]

How can films be re-released in 3D when they weren't originally filmed in 3D?

[Nibble]

Excerpt from http://en.wikipedia.o...D#2D_to_3D_conversion

In the case of 2D films that were generated from 3D models (as with CGI animated films), it is possible to return to the models to generate a 3D version.

For other 2D films, different techniques must be employed. For example, for the 3D re-release of the 1993 film The Nightmare Before Christmas, Walt Disney Pictures scanned each original frame and manipulated them to produce left-eye and right-eye versions. Dozens of films have now been converted from 2D to 3D. There are several approaches used for 2D to 3D conversion, most notably depth-based methods. [1]


How they do it is here, I've got better things to do than read all of it, but enjoy ☺