The impressive two and a half minute crane shot that encircles Tilda's house took three days to be completed. American distributors wanted the shot to be cut from the film for US release, but Argento refused.
The word 'Tenebre' is a Latin/Italian term meaning darkness or shadows.
The harsh 'modern look' and cinematography of the film was largely due to Dario Argento being impressed with Andrzej Zulawski's Possession (1981) - both films were on the DPPs 'Banned Films suitable for prosecution' aka 'Video Nasty' list.
Director Dario Argento called star Anthony Franciosa one of the most difficult actors he's ever worked with.
Dario Argento: [Black leather gloves] Closeup shots of the killer's hands, clad in black leather gloves.