Tenebrae (1982) 4K UHD. 4K (2160p) UHD Blu-ray presentation in Dolby Vision (HDR10 compatible). The Unsane World of Tenebrae, an archival interview with Dario Argento. 4K UHD Blu-Ray (1 disc). The 4K disc is Region A/B/C compatible (also known as REGION FREE).