A sensation at the Sundance Film Festival, African-American writer/director Dash’s independent feature has influenced many a filmmaker and artist since, notably Beyoncé and “Lemonade.” By way of Arthur Jafa’s location lensing in South Carolina and on St. Helena Island—best seen projected in this 2K restoration—Dash immersively conjures the West African Gullah culture’s coastal enclaves of the early-1900s American South, as the prospect of migration and assimilation beckons.