Artist Nick Cave uses buttons — tens of thousands of them — along with bangles, sequins, doilies, pot holders and even animal statuettes to create his distinctive sculptures, and there were plenty of them in Nick Cave: Sojourn, the centerpiece of Spun, last year's salute to textiles at the Denver Art Museum. The biggest attention-grabbers, though, were his signature Soundsuits, luxuriously appointed hooded garments. Cave's over-the-top, more-is-more piss-elegant aesthetic makes him the RuPaul of conceptual art, with his sojourn in Denver clearly the artistic high point of last summer.