In formlessfinder’s Bag Pile proposal, a series of geotextile containers filled with loose, shifting materials composes a massive structure that shades Warm Up partygoers and other visitors to MoMA PS1. A dense arrangement of weighty columns, arches, and vaults creates irregular spaces, a formless forest for a time of ecological concern and diminishing resources. The fill materials—gravel, sand, and recycled foam—are most often used in landscape design to control erosion. Usually hidden from view, here these quotidian materials (which will be recycled at the end of the summer) are piled to create a broad range of effects. In addition to the shade created by the structure overhead, pools of water positioned throughout the courtyard provide respite from the hot summer sun.