“I thought about The Exterminating Angel,” Lucy Kerr says over coffee as she describes the origins of Family Portrait, her hypnotic feature debut. Indeed, the film’s central conceit hews closely to Luis Buñuel’s 1962 satire, but instead of posh partygoers being inexplicably stuck in a single room, an extended Texas family is unable to get everyone to gather for the titular photo. In particular, Katie’s (Deragh Campbell) pleas for everyone to assemble are frustratingly ignored or otherwise thwarted, especially when the family matriarch (Silvana Jakich) is suddenly nowhere to be found. Wandering around the vast property in search of her mother, Katie seemingly stumbles into a state of fear and confusion as the prospect of taking the following December’s Christmas card dwindles with each passing moment.