Like lingering petrichor or damp earth, Meg Webster’s sculptures envelop the senses—hardly surprising, as they emerge from “soil, sand, and salt,” in the words of the DIA Art Foundation, a longtime guardian of her work. For years, visitors have been invited to step around and into the shadow of her earthworks, installed as mounds and pillars along the gallery floor.   Starting March 19, those encounters will be bottled and available year-round, thanks to a collaboration between Webster, DIA, and Comme des Garçons, which has produced the artist’s first signature perfume. According to a sample sent to the ARTnews office, the scent is gender-neutral, woodsy, and slow-suffusing—with a late spark of musk, like a fallen branch underfoot, cracking the stillness. The fragrance is housed in a polished silver tetrahedral (a triangular pyramid) box, a form familiar from Webster’s visual vocabulary.  Related Articles “I make sculptural works with natural materials, formed into primary geometric shapes meant to be directly perceived by the body. The making should be visible,” Webster told ARTnews. “The perfume we created with DIA strives to be a primary fragrance—like the air after a spring rain or a walk in the deep forest.”  Polished Tetrahedron for Sometimes Containing Water Collectors of the Japanese fashion label Comme des Garçons, founded by Rei Kawakubo in 1969, know it …