Vincent Price in the Theater in 1953

The shoot for this film utilized Julian and Milton Gunzburg's natural vision 3D system, the same one that was used for Blonna Devil in 52. The rig for this involved two cameras aimed at each other with mirrors then positioned at around the distance of human eyes facing forward towards what you're filming. And then in theaters, you had to have two projectors going at once, each projecting one of these two reels of film. According to Scorsese, it was just absolutely brain breaking to watch if you got those two reels out of sync.