PHOTOS BY FLORIAN WAHL Ilana Schimmel, left, and Danielle MacMath co-star in “Exposed” at the Black Box Performing Arts Center in Englewood. Having recently presented little-known works by well-known writers Eric Bogosian (“1+1”) and Paul Schrader (“The Cleopatra Club”), the Black Box Performing Arts Center in Englewood is continuing in that vein with Beth Henley’s “Exposed.” This is the first full production of the 2002 drama, in fact, though it previously had a workshop production in Poughkeepsie, in 2003. Set in Los Angeles in the late 1990s, during a Winter Solstice, “Exposed” — directed, …