{
  "_readme": [
    "Drop-in painted art for Total Annihilation (spec: src/games/totalannihilation/sprites.md).",
    "Paint a sheet, drop the PNG under assets/images/totalannihilation/, set its `path` below and",
    "reload — no code changes needed. Any sheet left path:null is rendered procedurally.",
    "",
    "`kind` selects which procedural painter stands in for an unpainted sheet, and it is the reason",
    "adding a sheet here is a JSON-only change: painters are keyed by kind, never by sheet name.",
    "  unit      — frameWidth == frameHeight, art drawn FACING RIGHT (+x) and CENTRED in the cell,",
    "              in neutral grey so the runtime army tint multiplies correctly. The engine rotates",
    "              the sprite, so keep the silhouette inside a circle of diameter frameWidth*0.7 or",
    "              the corners will clip as it turns.",
    "  structure — frameWidth == frameHeight, buildings are NOT rotated and NOT drawn facing right.",
    "              Two frames per building: the finished one and a translucent wireframe used while",
    "              it is still being nanolathed.",
    "  terrain   — one sheet per theme. Frame order is fixed (see `terrainFrames` below) so any new",
    "              theme sheet drops straight in.",
    "  icon      — build-menu glyphs, full colour, never tinted.",
    "",
    "`cols` only sizes the procedural stand-in canvas; a painted sheet is measured from the PNG.",
    "Adding a THIRD ARMY = add two sheets here (kind unit + kind structure) and one `armies` entry",
    "in data/totalannihilation-rules.json. Adding a THEME = one sheet here, one `themes` entry, and",
    "the theme id in rules.skirmish.themes."
  ],

  "terrainFrames": {
    "_comment": "Fixed frame order every kind:terrain sheet must follow.",
    "ground": 0, "groundAlt1": 1, "groundAlt2": 2, "rough": 3,
    "cliff": 4, "water": 5, "waterDeep": 6, "metal": 7, "road": 8
  },

  "sheets": {
    "arm-units": {
      "key": "ta-arm-units", "path": "assets/images/ta/arm-units.png", "kind": "unit",
      "frameWidth": 128, "frameHeight": 128, "cols": 8,
      "rows": 8
    },
    "arm-structures": {
      "key": "ta-arm-structures", "path": "assets/images/ta/arm-structures.png", "kind": "structure",
      "frameWidth": 192, "frameHeight": 192, "cols": 6,
      "rows": 4
    },
    "core-units": {
      "key": "ta-core-units", "path": "assets/images/ta/core-units.png", "kind": "unit",
      "frameWidth": 128, "frameHeight": 128, "cols": 8,
      "rows": 8
    },
    "core-structures": {
      "key": "ta-core-structures", "path": "assets/images/ta/core-structures.png", "kind": "structure",
      "frameWidth": 192, "frameHeight": 192, "cols": 6,
      "rows": 4
    },
    "terrain-grasslands": {
      "key": "ta-terrain-grasslands", "path": "assets/images/ta/terrain-grasslands.png", "kind": "terrain",
      "frameWidth": 128, "frameHeight": 128, "cols": 9,
      "rows": 1
    },
    "terrain-snowfields": {
      "key": "ta-terrain-snowfields", "path": "assets/images/ta/terrain-snowfields.png", "kind": "terrain",
      "frameWidth": 128, "frameHeight": 128, "cols": 9,
      "rows": 1
    },
    "terrain-tropics": {
      "key": "ta-terrain-tropics", "path": "assets/images/ta/terrain-tropics.png", "kind": "terrain",
      "frameWidth": 128, "frameHeight": 128, "cols": 9,
      "rows": 1
    },
    "icons": {
      "key": "ta-icons", "path": null, "kind": "icon",
      "frameWidth": 64, "frameHeight": 64, "cols": 10,
      "rows": 4
    }
  },

  "themes": {
    "grasslands": {
      "name": "Grasslands",
      "sheet": "terrain-grasslands",
      "palette": {
        "ground": "#5f7f3d", "groundAlt1": "#6b8c45", "groundAlt2": "#55743a",
        "rough": "#7d7048", "cliff": "#4c4838", "cliffTop": "#6b6552",
        "water": "#2f5f9e", "waterDeep": "#1d3f70",
        "metal": "#9aa3ab", "road": "#8b8578", "speck": "#3f5a28"
      }
    },
    "snowfields": {
      "name": "Snowfields",
      "sheet": "terrain-snowfields",
      "palette": {
        "ground": "#d6dee6", "groundAlt1": "#e4ebf1", "groundAlt2": "#c4cfda",
        "rough": "#a9b4bf", "cliff": "#6a737e", "cliffTop": "#8e99a4",
        "water": "#3d6d95", "waterDeep": "#27506f",
        "metal": "#9aa3ab", "road": "#9fa6ad", "speck": "#aebccb"
      }
    },
    "tropics": {
      "name": "Tropics",
      "sheet": "terrain-tropics",
      "palette": {
        "ground": "#2f6b3c", "groundAlt1": "#3a7f46", "groundAlt2": "#265c33",
        "rough": "#7a6b3a", "cliff": "#4a3f2e", "cliffTop": "#6d5f45",
        "water": "#1f8fa8", "waterDeep": "#12667a",
        "metal": "#9aa3ab", "road": "#9c8f6e", "speck": "#1d4a26"
      }
    }
  }
}