I'm going to talk about Ed Wood now, and Plan 9 From Outer Space.
Ed Wood is famous for being posthumously named the Worst Director of All Time. From his wiki:
Does this style sound familiar? Please visit the pink link and read over his death. Tim found his story so tragic and beautiful that he immortalized it in his first ever biographical work, a B&W film starring Johnny Depp in the titular role. The film follows Ed's lackluster life and career, culminating in the creation of his masterpiece: Plan 9.
The climax of the film has Ed storming off set in frustration and meeting Orson Welles in a chance encounter at a bar, who rekindles Ed's inspiration by advising him to assert his vision and resist artistic changes imposed onto him by sponsors. Filming for Plan 9 finishes with Ed taking action against his producers' wishes.
Plan 9 From Outer Space contains a segment in which the lighting changes from night to day and back to night again all in the same scene. It has been pointed at and ridiculed for decades as the epitome of incompetent film-making.
I now present every bizarre Day/Night change in Beetlejuice Beetlejuice:
The film opens on a thunderstorm at night in Winter River. When we leave Delia's studio, it's daylight and the ground is wet from rain.
When Rory calls Betelgeuse's name three times, it's daylight and abruptly changes to night within the model. However, there's a mockery of daylight coming through the windows in the therapist's office.
The sun only appears on screen while we're viewing Jeremy's tree. After that, it disappears and never reappears.
Daylight comes back when Lydia quits Ghost House, and night returns for good when she wakes from the dream. The thunderstorm from the opening is still pouring.
Thank you @jadeluz-official for doing that homework for me.
But why reference Ed Wood at all? It has always been my belief that someone high up in the chain censored beetlebabes behind the scenes long before any sequels were ever even approved to be written. We know the cartoon was heavily censored. It only tracks that any sequel projects would have faced lots of sanitizing opposition as well. Following this thread, paying homage to Ed Wood in this way with this campy, highly-criticized, nonsensical, non-sequitor sequel full of "plot holes" and "idiosyncratic stories" completes a circle for Tim I think.
Sidenote: Plan 9 From Outer Space contains a cameo from Vampira, who famously sued Elvira for "stealing" her persona and held a lifelong grudge against her.