It’s Alessandro Dell’Acqua’s second season at Rochas, and he’s made some adjustments since his rocky debut this February. For Spring, a hummingbird pattern that he lifted from the archives and used as both a print on georgette and as a beaded embroidery on silk faille signaled his intention to lighten things up. His fabrics were often transparent or nearly so. The hand-painted flocked organza of a button-down shirt and a full, calf-length skirt was opulent yet airy. And Dell’Acqua went gung ho for lace, patchworking Chantilly and guipure and macramé on a single slipdress or layering a strapless lace smock over a longer, narrower lace skirt.