Boardwalk Empire VFX Breakdowns

Brainstorm Digital cooperates with all the major Studios in Hollywood and tackles the most challenging visuals effects. They quickly established themselves as a premier visual effects studio. They are also cutting edge innovator (in according to their description), they apply their creative ingenuity, technical expertise and love of the crafts to provide the best quality visual effects for feature films. (Brainstorm Digital)
Brainstorm Digital published this reel at Vimeo, but you can watch it embedded right here. Enjoy!

You can clearly see how taking shots like this works here. Instead of building and managing the whole scene, directors use blue canvas and track the movement of the camera. After taking some footage outside, visual effects studios make their best in postproduction to make final composite.

Even the streets are half  - real! One half is taken by camera, second half was made in 3D programs.

Sky and some 3D objects are done in postpro.