The cavernous, multidimensional glass sculptures of Australian artist Sergio Redegalli got Christian Siriano thinking about the “effects of transparency” for Spring 2015. The designer experimented quite a bit with layers, building dresses from sheets of striped organza, or adding spiky crystals as an underskirt peeking out from the bottom of a brocade cocktail dress. A laser-cut, leaf-like embroidery overlaid on sheer organza fabric added texture to a cap-sleeve blouse worn with a long pleated skirt. The color palette was icy, moving from white to glass-green to navy, with graduated colors in between. Many of the textiles were inspired by Brooklyn artist Tara Donovan, whose installations are made out of ordinary things like Styrofoam cups, fishing line, and plastic drinking straws. In some cases, Donovan’s influence worked quite well. For instance, a green bubble lamé looked fetchingly retro on a high-low gown and a full skirt that was paired with a navy crewneck. However, a raffia ball skirt—inspired by the fishing line—had a heftiness to it that felt off when worn with a cropped, thin-strapped tank.