The group show showcases detailed, obsessive and repetitive drawings by Hudson Valley contemporary artists, including Henrietta Mantooth, Ken Polinskie, Ruth Leonard, Wendy Ide Williams, Matt Bua, and Sara Pruiksma, among others. Exploring drawing as a way to develop and record a language, mapping personal history and evolution of thoughts. Opening reception, 5 p.m., May 2. Information at greenearts.org.