PARIS — Plain and simple is out — at least when it comes to lingerie and swimwear fabrics for spring 2001. Energized by the new millennium, textile designers are pulling out all the stops, and the result is an eclectic mix of creative elements. “The fabrics have a very narrative nature this season,” said Claire Jonathan, group manager for Salon International de la Lingerie and Interfiliere. “They want to tell a story.” Exotic lands such as Indonesia and Africa inspire a range of brightly colored batik prints, particularly for swimwear, while elements of the desert — from warm earth colors to rustic textures — prevail in lingerie. Also popular for lingerie are nostalgic, childlike prints such as butterflies in soft, pastel shades and fabrics with iridescent effects achieved by combining opaque and transparent qualities. Here, a preview of fabrics to be shown at Interfiliere.