Uniforms and insignia of the Schutzstaffel shoulderboards on both sides. In March 1936, the camp "service" was formally established as the third branch of the SS, the "Totenkopfverbände" or skull units. At about this same time, for similar reasons, the military SS formations (the "Leibstandarte SS Adolf Hitler" and the "SS-Verfügungstruppe") adopted a service uniform in what was termed "earth-grey" ("erdgrau"). This also was based on the black uniform, but without the red "Hakenkreuz" armband, its place on the left sleeve being taken by an eagle-and-swastika patch, and worn with trousers and shoes or calf-high jackboots. In June 1938 this uniform was authorized for full-time "Allgemeine-SS"
Nazis at the Center of the Earth rooms, rapelling scenes and green screen virtual sets). The film features one of the highest visual effects shot counts in an Asylum film, 379, and the effects were completed in just four weeks. In his commentary, director Joseph J. Lawson cites as his visual influences Steven Spielberg, Peter Jackson, Sam Raimi, John Carpenter, John Landis, David Lean, J. J. Abrams and Robert Rodriguez. Critical and audience reaction to the film has been mixed with everything from "absolute garbage" to "the Citizen Kane of Asylum films". Nazis at the Center of the Earth Nazis at the Center of the Earth is