As we delve into understanding Islamic culture (Approaching the Qur'an, anyone?), we discover there are many different cultures within Islam, each with their own traditions. The Gnawa (pronouced "guh-NAH-wah") are a group of healers and musicians descendant from sub-Saharan black slaves now living in the Maghreb (Morocco, Algeria and Tunisia) that blend Berber, Arab and black African traditions within the scope of Islam. An exhibit, titled The Gnawa: African Trance Culture in Morocco, featuring instruments, ritual clothing, headpieces and photos ("Colors," by Rodrigo Dorfman, is pictured) of Gnawan culture opened at UNC-Chapel Hill's Center for International Studies Aug. 20, the first part of a project that will feature workshops, symposiums and performances later this fall. The exhibit's reception will be held Thursday, Aug. 29, from 7-9 p.m., at the center, across the street from Morehead Planetarium. Call 962-3094 for details.