The film was originally to be titled "Dark Triad" but after the prologue "Fungus" was added it became "Dark Quartet" and later "Black Omnibus". "Fungus" is being produced as proof of concept and was originally going to be part of Carrozza's "Micro-Shocks" web series.
The segment "Major Millions" was inspired by a short Hong Kong horror film directed by Tun-Fei Mou entitled "The Prize Winner". Carrozza changed the concept to use a Western-style Ouija board rather than a Chinese fortune telling map and altered the characters completely so it could be done legally.