Intentional narrative gap or omission in editing — viewer fills in missing information. Brechtian alienation effect in cinema.
The lacuna functions at the editing table as a deliberate omission of information—not by accident, but as a creative decision. You cut a scene in such a way that the viewer is forced to think for themselves. An action remains unseen, a dialogue is cut short, a reaction is missing. The audience fills the gap with their own imagination, becoming active rather than passively consuming. This is the opposite of spoon-feeding.
Practically, this means: You've shot a negotiation scene but only show the faces of the participants—never the table, never the object of negotiation. The viewer constructs for themselves what it's about. Or a character starts a sentence, cuts away to something completely different, and the answer to their question comes much later—or never. This creates suspense because expectations remain open. In editing, you work with rhythm and omission rather than completeness. Jump Cuts can be part of this strategy, as can Match Cuts that establish connections without explaining them.
This fundamentally differs from classical narrative transparency, where every plot point is shown and explained. A lacuna trusts the audience—and simultaneously creates a certain alienation, as Brecht called it. The viewer consciously remains outside the picture, having to engage. This works particularly well in arthouse cinema, in documentary work, in productions that aim to provide interpretation rather than information.
In the editing room, you quickly notice whether a lacuna works or just confuses. Timing is crucial—the gap must be large enough to create space, but not so large that the narrative breaks down. A good example: scenes without music, where silence itself carries information. Or cuts that break spatial or temporal continuity without explaining transitions. The edit thus becomes an active narrator, not just a technical tool.