Halls, doorways, and walls in a room are shot in such a way (employing focus changes, reframing, introducing outside objects) as to confound and puzzle the viewer about the represented space.
"'Interieur Interiors (To A.K.)' creates a cinematic space that remains separate from representation, severed from the profilmic but nevertheless presenting an illusion of space. It is a film that hovers between conceiving the interrupted projection beam as an image... and conceiving it as a non-image, a mere illumination of the surface on which it falls. The gap between these extremes is posed by Grenier's film as the raw data of cinema, the interval in which structural aspects of the medium's depiction of space are revealed." - Grahame Weinbren and Christine Noll Brinkmann, Millennium Film Journal, 1981