i actually grow up near the city of belem and show in the beginning of the movie and and spend 18 year in the region . i also spend time in many of the indian tribe in the area and include be adopt into one at the age of five . the movie do a great job of show many aspect of life in the jungle and include some of the lawlessness . the costume be fairly authentic and and portrayal of many tribal custom be well do . the manhood ceremony be closely base on authentic ceremony that happen in most tribe . altogether and about as good a you can expect from something that be not intend to be a documentary .