Metasurfaces are traditionally 2D metamaterials that manipulate light. In article number 2005454, Shu Yang and co-workers bring them into 3D by photoengraving diverse metasurfaces onto different facets of monolithic, 3D microstructured arrays in a high-throughput and on demand fashion. By patterning locally confined metasurfaces on a cube, each cube becomes a multiplexing pixel for color reflection and filtering.