The final battle between the Persians and Spartans took place over approximately 50 visual effect shots.  In addition to the same requirements for the CG background environment in the first section, the battle shots also required countless arrows, spears, shields, interactive blood, debris and dust elements.

As the actors were shot without practical arrows, extensive 3D tracking & matchmoving was required to add these CG elements & lock them to the body.  Additionally, dummy props that were being used by the actors were replaced with their CG counterparts.  Interactive blood elements and debris were then added and tracked to the respective actor.

Hover your mouse over the images below to view the original element...