Nice insight into the making of 'Snow White and the huntsman'

There were a lot of mixed reviews for this film.  I personally enjoyed it! Most of all for the visual effects.
As far as I know, BlueBolt were responsible for the castle and village and environment extensions surrounding after the VFX supervisors (Cedric Nicolas-Troyan and Phil Brennan) visited their London site and saw their work for Game of Thrones season 1.
The Mill were responsible for the opening title sequence; Pixomondo were responsible for the prologue battle and the assault on the castle at the end of the movie; Nvizage for the previsualization; Rhythm & Hues completed the Troll sequence and Dneg were responsible for the dark forest and all it's creatures and the dark fairies (probably my favourite visuals in the film is when the queen appears and dissapears from clouds of these).

Check out these great in-depth interviews and breakdowns for the film:
http://www.fxguide.com/featured/every-trick-in-the-fairytale-book-snow-white-and-the-huntsman/
http://www.flickeringmyth.com/2012/07/grimm-reality-making-of-snow-white-and.html