Kate Gridley In an era when selfies are arguably the most common images of young people, it’s unusual to see paintings of almost-adults — never mind life-size oil paintings. Because, you know, they take a long time to create. Vermont artist Kate Gridley defies instant gratification in her series titled “Passing Through: Portraits of Emerging Adults.” She’s been touring the large-scale works — realistic, richly painted figures against stark white backdrops — around Vermont and this week brings them to the Amy E. Tarrant Gallery at the Flynn Center in Burlington. Her 17 subjects represent a range of beliefs, sexual identities, socioeconomic status, health issues and life experiences, but what they all have in common is their stage of life. “‘Passing Through’ marks moments in which emerging adults transition to realizing their selves and claim their voices,” Gridley writes on her website. The exhibit will be on view through April 12.