- Film included no fewer than 1,100 bald extras.
- Reportedly one of Adolf Hilter's favorite films.
- An original version, according to Lang himself, has not existed since the middle of 1927. Being one of the most expensive movies of the time, around 5,000,000 marks, it nearly sent UFA (Universum Film) into bankruptcy.
- The restored version of 2001 is based on a digital restoration at 2K resolution from the best available sources. The image quality far surpasses anything seen since the original release of the film.
- No optical printing system existed at the time, so to create a matte effect, a large mirror was placed at an angle to reflect a piece of artwork while live footage was projected onto the reverse. To expose the projected footage, the silvering on the back of the mirror had to be scraped off in strategically appropriate places. One mistake would ruin the whole mirror. This was done for each separate shot that had to be composited in this manner.
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