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Re:Disney's Hyperion Renderer by Xophmeister on Monday August 03, 2015 @08:19AM (#9995193)
This article[1] implies that there's a lot of cross-pollination with regard to computer graphics research and technology within the movie/VFX industry. So my guess is a bit of friendly competition that keeps spurring new innovation (similar to the browser wars).

[1] http://www.fxguide.com/featured/disneys-new-production-rende...

Re:Disney's Hyperion Renderer by eddieroger on Monday August 03, 2015 @08:39AM (#9995281)
Not backed by an article, but I'd assume there's also the factor of needing a new or different capability for an upcoming project, which would prompt the technicians to try something different without affecting in-flight projects. They can always share some of Hyperion with Pixar when Pixar is at a point to change things.