Indeed, a feast for the eyes in term of Visual FX. Check this video out, a making of clip and enjoy!
Also, interesting article of the issues Pixomondo had to get this done – http://www.wired.com/underwire/2012/01/pixomondo-hugo-vfx/
A 3D film by Martin Scorsese
This movie was the great experiance of my life. I saw it 3 times so far.