Move quickly through the Crown Heights neighborhood of Brooklyn, down the main thoroughfare Eastern Parkway, past a conflicting intermingling of beautiful terraced homes and marred vacant buildings, and you could easily miss a modern cultural landmark. Hidden in plain sight, packed inside a shuffle of industrial architecture, is the wondrous workshop loft space of Kellam Clark and some half dozen other artists and makers who call his whimsical live-in, work-in reliquary, home.