Which Disney animated film was the first to use the 'Disney Digital 3-D' process?

Which Disney animated film was the first to use the Disney Digital 3-D process? The answer is Chicken Little.

Released in 2005, Chicken Little was the first Disney in-house feature rendered for the Disney Digital 3-D format. Disney worked with RealD and participating theaters to present selected screenings with digital stereoscopic projection, while conventional two-dimensional showings continued alongside them.

The film was also Disney Animation’s first fully computer-animated feature. Its 3-D presentation was created after production had already begun, with Industrial Light & Magic handling the conversion. The process generated separate left-eye and right-eye images so viewers could perceive depth through specialized glasses.

A useful distinction is that Chicken Little was converted for 3-D rather than originally animated and rendered as a native stereoscopic production. Bolt, released in 2008, is commonly identified as the first Disney animated film animated and rendered specifically for digital 3-D. Later films such as Tangled and Frozen benefited from a much more established 3-D pipeline, but neither was the first Disney Digital 3-D feature.