More clips from Keanu Reeves’ film vs. digital documentary Side by Side have landed online, and though I’m incredibly excited for narrative features like Django Unchained and Les Miserables later this year, I’m becoming increasingly convinced that Side by Side will be the most fascinating film I see in 2012.  We recently shared clips of people like Martin Scorsese and The Wachowskis discussing the moviemaking process, and today we’ve got two bona fide titans: James Cameron and David Fincher.  Cameron raves about how much more active the brain is while watching 3D films as opposed to 2D, while Fincher discusses the crux of his job as a director.  They’re both incredibly interesting clips, and if this is the stuff that ended up on the cutting room floor, I can only imagine how in-depth the full film will be.Hit the jump to watch the clips.  Side by Side hits theaters is currently playing in limited release and is now available on VOD on iTunes.Clips via The Playlist.side-by-side-poster