The alchemy was off at the house of Mugler, where Lady Gaga's stylist, Nicola Formichetti, again failed to live up to his reputation as a sort of Generation Y Midas who turns everything he touches into gold. Formichetti's second effort as Mugler creative director fizzled Wednesday, as the label fielded a less-than-convincing spring-summer 2012 ready-to-wear collection of willfully wacky sci-fi garb in neutral shades. It was as if the show, which garnered only a tepid round of applause before fashion insiders fled into the hot Paris night, had been tailor-made to drive home a crucial point: That buzz does not a fashion house make. No one knows that better than Dries Van Noten, the modest and affable Belgian designer, has built an empire on the quality of his clothes alone. Van Noten delivered another tour de force Wednesday, with a collection of sculptural skirts and jackets printed with cityscapes by night. It looked as if Damir Doma were following in Van Noten's footsteps, not aesthetically — the designers have radically different visions — but by allowing his clothes to mature naturally and to speak for themselves.