3/4 evokes the intimacies, joys, and tensions of a contemporary Bulgarian family facing an uncertain future; the father is an astrophysicist with his head in the clouds, his son a waywardly antic teenager, his daughter a gifted but anxious pianist. Illian Metev (whose previous film was the gripping documentary Sofia’s Last Ambulance) won the Filmmakers of the Present prize at the 2017 Locarno Festival for this fiction feature debut, a gracefully shot, uncommonly tender character study that plays like an exquisite piece of chamber music.