Elephants Dream codenamed Orange is a computergenerated short film that was produced almost completely using the free software 3D suite Blender except for the modular sound studio Reaktor and the cluster that rendered the final production, which ran Mac OS X. It premiered onMarch 2006, after aboutmonths of work. Beginning in September 2005, it was developed under the name Orange by a team of seven artists and animators from around the world. It was later renamed Machina and then to Elephants Dream, referring to a Dutch tradition used by parents to abruptly end childrens bedtime stories with introducing a sneezing elephant.
The films purpose was primarily to field test, develop and showcase the capabilities of open source software, demonstrating what can be done with such tools in the field of organizing and producing quality content for films.During the films development, several new features such as an integrated nodebased compositor, hair and fur rendering, rewritten animation system and render pipeline, and many workflow tweaks and upgrades were added into Blender especially for the project. ........
Source: Wikipedia