{
  "kind": "building",
  "id": "prism-loom",
  "role": "prism-glass-workshop",
  "name": "Prism Loom",
  "footprint": "2.75×2 tiles",
  "function": "A two-worker civic workshop combines sunshine and rainwater into prism glass while emitting rainbow light to nearby homes.",
  "shape_and_silhouette": "A broad open-fronted weaving hall is crossed by two elevated glass rollers beneath a shallow sawtooth roof, with one tall rainbow fin marking the rear corner.",
  "visual_description": "Slender spun-glass columns and copper shoes frame the +Z prism-screen loggia, pearl cloudstone side bays enclose the loom drives, alternating roof pitches admit north light, layered coral-gold-blue fins wrap one side and the rear stair, and a low grafted loading deck exposes its pumice knees and vapour-rope webbing.",
  "production_notes": "This is a prosperous civic workshop placed near homes, combining precise public-facing glasswork at the front with older patched cloudstone machinery bays behind.",
  "departure": "It is the most porous everyday building, distinguished by a wide luminous arcade and horizontal loom rollers rather than a solid portal or vertical harvesting mast.",
  "shared_traits": [
    "Wind-rounded cloudstone masonry around a buoyant pumice frame.",
    "Copper fittings, vapour rope, and visible bands of repaired prism glass.",
    "Deep openings and a stable silhouette shaped for exposed cloud shelves."
  ],
  "constraints": [
    "The main public entrance faces +Z through the central loggia bay.",
    "Resolve the loom rollers, open arcade depth, roof valleys, rear stair, side machinery bays, and deck underside.",
    "Construct the rainbow fins as overlapping rigid panels held in visible copper shoes."
  ],
  "idle_animation": "The paired loom rollers turn slowly in opposite directions while a narrow band of rainbow light advances across the front screen.",
  "day_night": "By day the layered fins cast coloured bands across the loggia, while at night the active loom softly backlights the screen in coral, gold, and blue."
}