Inventive use of materials is everything in Karla Black’s huge installation, ‘Includes Use’ at David Zwirner Gallery. Mixing powder paint and plaster, Black covers the gallery floor with a beach of cocoa-like powder separated into curving organic shapes by frilly tucks of toilet paper. The artist resists the term ‘feminine’ to describe her work, but with glitter as the finishing touch, the effect is decidedly pretty. (In Chelsea through March 26th).