Imagine studying a building not by walking its hallways or perusing its blueprints, but by examining each of its bricks: the pockmarks produced by air bubbles in the clay, the whorls of reds and browns, the trowel’s impressions in the mortar. Imagine evaluating a mosaic not for the bigger picture but for the glint of indi-vidual tesserae. Or imagine not watching a film but looki…