Witney Seibold writes in Blumhouse about a lost Hitchock project I didn't know about Rare Clips from Hitchcock’s Unmade Found-Footage Project KALEIDOSCOPE
KALEIDOSCOPE was, to put it in modern language, meant to be perhaps the very first ‘found footage’ or ‘mockumentary’ film. With photographer Arthur Schatz, Hitchcock staged some nudity-laced, crime-scene-like photos of the film’s potential victims — which, having seen them, may have indeed been too edgy for modern American audiences. Additionally, they shot some handheld motion picture scenes, wherein women were stalked.
It was even proposed that there was to be no sound in the film; the actors were to be unknowns, and the performers seen in the test footage are still unknowns to this day.
KALEIDOSCOPE was meant to be one of the darker, edgiest horror films ever made — it was, essentially, made to have the same sort of raw, fleshy terror as something like THE TEXAS CHAINSAW MASSACRE, but with a classier and more experienced art director at the helm. It was meant to look like it was discovered after the fact, having been filmed by an unnamed voyeur who somehow had access to the dark sexual murders depicted."
There are short video clips embedded in the article.