Few giallo directors were as adept at melding the sundry fetishes that defined the movement as Luciano Ercoli. Nudity, violence, cabaret numbers, quirky camera work, exquisite living rooms, and flash clothing all hit their crescendo under the steady guidance of a man who seems to treat every film as a fashion shoot.
Forbidden Photos concerns itself with only one murder, rather than a series of them, which might, for some, put it at a distance from the giallo genre as a whole. If you are someone who comes to giallo cinema primarily for its stylized violence that will likely be the case.
All the Colors of the Dark works within the confines of the giallo, but it takes the genre further afield than had previously been explored, resulting in a dizzying psychedelic combination of straight-forward stalker/murder mystery, hallucinogenic psycho-sexual exploration, and straight up occult/devil worship horror.