Ronaldus Shamask has been focusing on the business aspect of his company, Shamask, rather than design for a number of years. But for resort, he came full circle with a collection that mines the past — shapes from the Seventies and Eighties — yet looks current. “It’s time to have fun again. I want these clothes to be intellectually exciting,” said Shamask, “and have the spontaneity of something you just throw on when you wake up.” All the silhouettes were there: shorts; long or short lean dresses and coats in iridescent jersey, linen and silk or leather; flared long cashmere sweaters and elaborately contoured jackets in white leather and linen. The long spiral-cut lean skirts and dresses were at once sensual and simple and even breezy palazzo pants called attention to their detailed stitching.