"A big disappointment was the number of rural scenes in the final cut."
It also warned: "It is very difficult to feature Maori culture in American reality TV in a culturally appropriate and respectful way. This should be treated with extreme caution in the future as there is no way to guarantee the outcome."
In one challenge, the contestants had to strike a pose with a sheep. The young women also affected a range of facial expressions when greeted by a haka on Mt Eden.
A spokesman for Tourism Minister John Key said: "Film and television production in New Zealand remain very important ways to get our tourism message out to the world."
Film and television maker Tainui Stephens, who has worked on major foreign productions involving Maori culture, said the basis had to be knowledge and respect.
"We can get too precious about Maori culture. You can do anything you want with Maori culture as long as it is rooted in integrity and mana."
The details of the Tourism NZ report were released to the Herald under the Official Information Act.