Editing IMAX (section)

=== {{anchor|IMAX 3D}} 3D ===
{{further|3D film}}
To create the illusion of depth, the IMAX [[Stereoscopy|3D]] process uses two separate camera lenses that represent the left and right eyes. The lenses are separated by a distance of {{convert|64|mm|in|abbr=on}}, the average distance between a human's eyes. Two separate rolls of film are used to capture the images they produce. The IMAX 3D camera weighs over {{convert|113|kg|lb|abbr=on}}. By projecting the two films superimposed on the screen and using one of several available methods to direct only the correct image to each eye, viewers see a 3D image on a 2D screen. One method is to use [[polarizer|polarizing filters]] to oppositely [[linear polarization|polarize]] the light used in projecting each image. The viewer wears glasses with polarizing filters oriented to match the projector filters, so that the filter over each eye blocks the light used to project the images intended for the other eye. In another method, the two projections rapidly alternate. While one image is being shown, the projection of its mate is blocked. Each [[film frame|frame]] is shown more than once to increase the rate and suppress flicker. The viewer wears [[Active shutter 3D system|shutter glasses]] with [[liquid crystal display|liquid crystal]]<!-- unfortunately, the "liquid crystal" article is dauntingly technical --> shutters that block or transmit light [[synchronization|in sync]] with the projectors, so each eye sees only the images meant for it.

Several of the early films that had been produced in [[digital 3D]] for release in conventional theaters<!-- the AE spelling appears to predominate in this article --> were also presented in IMAX 3D, including ''[[Avatar (2009 film)|Avatar]]'', ''[[Gravity (2013 film)|Gravity]]'' and ''[[The Amazing Spider-Man (2012 film)|The Amazing Spider-Man]]''. The first full-color IMAX 3D film was the 1986 short documentary ''[[Transitions (film)|Transitions]]'', produced for [[Expo 86]] in Vancouver.<ref name="Aitken">{{cite book|last=Aitken|first=Ian|title=Encyclopedia of the Documentary Film|url=https://books.google.com/books?id=JdSNAQAAQBAJ&q=%22Encyclopedia+of+the+Documentary+Film%22+IMAX&pg=PA169|date=October 27, 2005|publisher=Routledge|isbn=978-1579584450|pages=168–9}}</ref>