The Hollywood Reporter has featured a great article on previsualization, digital storyboarding with a certain degree of interactivity. The article mentions Pixel Liberation Front, which is assisting in revising/finishing scenes that have been pre-vis’d and storyboarded for films such as Spider-Man 3 and Superman Returns.
Check out the full article at the link above. You can also visit Pixel Liberation Front’s official site here.
Source: The Hollywood Reporter