HUDs

Runtime HUD

The built-in HUD reports session state, time, step, physics and render rates, playback rate, network health, entity count, and memory when available. Set presentation.hud.showRuntimeStats to false to hide it by default.

Presentation panels

Panels read live values from state.globals. Keep each panel tied to one stable global key.

{
  "presentation": {
    "hud": {
      "showRuntimeStats": true,
      "panels": [
        {
          "id": "energy",
          "type": "timeseries",
          "label": "Energy",
          "globalKey": "kinetic_energy",
          "position": "top-right",
          "color": "#38bdf8",
          "window": 180
        }
      ]
    }
  }
}

Annotations and analytics

Presentation overlays also support screen, world, and entity annotations, plus timeseries, bar, scatter, histogram, table, and stat analytics panels. Viewers can toggle these overlays from the player HUD menu.