It often takes a second while watching The Last Day, the feature debut by writer-director Rachel Rose, to make out exactly what it is we’re looking at. An extreme close-up of fur eventually reveals itself to be a deer. White light bouncing off a slick surface turns out to be the hood of an SUV. A blur of red and white slowly comes into focus as a display of packaged meats. The Last Day The Bottom Line A pair of powerhouse performances. Venue: Tribeca Festival (Spotlight Narrative)Cast: Alicia Vikander, Victoria Pedretti, Wagner MouraDirector-screenwriter: Rachel Rose Rated N/A, 1 hour 39 minutes Until these images resolve themselves, we are lost, out of sync with a world we should know yet can’t quite seem to make sense of — not unlike protagonists Julia (Alicia Vikander) and Taylor (Victoria Pedretti), moms who don’t quite seem at home in their lives either. Loosely inspired by Mrs. Dalloway, The Last Day delivers a take on the perils of modern motherhood that’s most powerful for the precision of its eye and …