Flittering was an obscure ritualistic Dark Ambient project hailing from the Black Forest region of Germany, formed by a shadowy duo known only as the "Bereaved Brothers". They alledgedly released this back in 1993, though there has been a great deal of debate on the Metal Archives forum as to whether or not it is a recent hoax.
The very existence of the release was in doubt amongst the majority of people, until the tracks were posted on The Doom Joint blog recently, from a seemingly genuine source.
For the full story here's the original thread on Metal Archives:
And the follow-up thread:
Having listened to the tracks, I am now fairly convinced that this is genuine, though there are still a couple of niggling doubts in my mind: the production is much clearer than would be expected from an underground release from 1993; plus there are certain stylistic motifs that would seem more in keeping with the zeitgeist of 2008.
Personally, I don't care if this is an elaborate hoax; the music is good (dark and unsettling ambience, with hints of Drone Doom and Depressive Black Metal), and the backstory interesting. That, my friends, is entertainment.
Flittering -- "Gloom" demo (1993)