Epic battle scene for Hobbit finale
The finale, directed by the New Zealand filmmaker, will take place at the foot of the Lonely Mountain as various armies fight it out for the newly reacquired dwarven treasure of Erebor.
"There's a lot of logistics that have to be thought through," Peter told Entertainment Weekly.
"We have dwarves and men and elves and orcs, all with different cultures, with different weapons, and different shields and patterns and tactics."
The director admitted a lot of work went into planning the action scene for the final instalment of the trilogy, the big-screen adaptation of JRR Tolkien's books.
"Before we could loose the first arrow, we had to design the landscape itself and figure out, 'OK, if we have 10,000 orcs, how much room are they going to take up?'" he explained.
"Are they going to fill up the valley or look like a speck?' Then we could start drawing the arrows on the schematics," he added.
Peter said the action-packed finale, which sees stars such as Martin Freeman, Orlando Bloom, Luke Evans and Richard Armitage reprising their roles, will satisfy fans.
"We have a rule that we're not allowed to go more than two or three shots of anonymous people fighting without cutting back to our principal characters," he said. "Otherwise the audience just ends up with battle fatigue."
The Hobbit: The Battle Of The Five Armies is scheduled for release in the UK on December 12.
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