Shooting is about to begin again on parts of the Lord of the Rings trilogy at Mount Potts station near Lake Clearwater.
However, nothing is being given away by production company Three Foot Six.
It is understood more than 100 regular force soldiers from Burnham and Linton are to be involved in filming next month, despite the pressure the army is under as a result of its large commitment to peacekeeping duties in East Timor.
However, NZDF is saying nothing about its involvement.
Spokesman John Seward said there was a tight contractual arrangement with Three Foot Six that any information was to come from the film company.
A spokesman for Defence Minister Mark Burton said the minister did not get details or updates on the NZDF's involvement in filming, although he understood personnel had taken part in the movie at Waiouru and other locations.
Three hundred cast and crew, with similar numbers of extras and horses, will be involved in the filming at Mount Potts.
The first of the three Lord Of The Rings films is due to be released in December next year.