Just saw the Hero trailer (yeah yeah, I know I'm slow, I don't watch tv). The FX is great, but I'm more impressed by the contrast of colours (issit contrast?). In some scenes where there's thousands of soldiers clad in dull grey, the main actors are wearing very bright green or red. How do they achieve that effect? It looks so ethereal. Filters? Or digital post-editing?
If it's not a digital post-editing, can that same method be used in photography?