Three vitrine spaces inside 45 Rockefeller Plaza, are activated with site-specific installations of plaster wall reliefs by Brooklyn-based artist LaKela Brown. Using bamboo hoops, door knocker earrings, heavy rope chains, and her own body as tools for casting, Brown makes impressions in the plaster, embedding the material with a series of references to hip-hop, ’90s music, and the culture in which she grew up. Also look for vinyl murals throughout Rock Center, on the Concourse and street levels, at 10…