Crump directed the feature-length documentary film Black White + Gray: A Portrait of Sam Wagstaff + Robert Mapplethorpe, which premiered in North America at the 2007 Tribeca Film Festival and in Europe at Art Basel. It explores the influence curator Sam Wagstaff, photographer Robert Mapplethorpe and musician/poet Patti Smith had on the 1970s art scene in New York City.

The young hero seems the essence of maleness, yet he's troubled by vaguely feminine objects. Soon his masculine and feminine selves are intercut, as each of his identities appears to look and gesture at the other. The film, at once melancholy and transcendent, consists of a shimmering, nearly plotless evocation of gender identity in flux through haunting, densely interlaced images.