config: set renderScale to 0.33

This reverts commit f4eb826c3a.

.gitignore

@@ -1 +1,2 @@
 background-standalone.html
+Screenshot*.png

README.md

@@ -7,9 +7,10 @@ dropped into an iframe or kiosk browser and left running.
 ## Features
 
 - **WebGL flight scene** (`vendor/clouds3d.js`): a 3D terrain mesh built from
-  real elevation data (Copernicus DEM), a raymarched volumetric cloud deck,
+  real elevation data (Copernicus DEM), a raymarched volumetric cloud deck with
-  optional round-world curvature, and a figure-eight flight path around the
+  soft layer edges and adaptive march length, optional round-world curvature,
-  configured location with a vertical bob inside the 15-35 km flight band.
+  and a figure-eight flight path around the configured location with a vertical
+  bob inside the 15-35 km flight band.
 - **One physical light model** shared by sky, clouds, contrails, aircraft and
   ground: direct beam through a Kasten-Young air mass with Rayleigh, ozone and
   aerosol extinction, diffuse skylight, moonlight, a starlight floor and aerial
@@ -129,13 +130,13 @@ flowchart TD
     F --> G[Sky pass: gradient, stars, Milky Way, sun, moon]
     G --> H[Star catalogue points]
     H --> I[Planet points]
-    G --> J[Terrain distance pass]
+    G --> J[Terrain distance pass, only when needed]
     J --> K[Terrain mesh pass]
     K --> L[City lights]
     L --> M[Car lights]
     M --> N[Optional atmosphere model]
     N --> O[Front haze]
-    O --> P[Cloud raymarch]
+    O --> P[Cloud raymarch, soft edges and adaptive march]
     P --> Q[Aircraft]
     Q --> R[Contrails]
 ```
@@ -252,16 +253,16 @@ Groups:
 | --- | --- |
 | `theme`, `language`, `timeFormat`, `units`, `credits` | palette, UI language, clock format, °C/°F, attribution line |
 | `debug` | debug panel (weather, shader counters, theme palette and lighting) |
-| `renderScale`, `maxFps` | internal 3D resolution and frame cap |
+| `renderScale`, `antialias`, `maxFps`, `performance` | internal 3D resolution, MSAA, frame cap and adaptive cloud-march quality |
 | `location` | `lat`/`lon` (+ optional `label`) - everything geographic |
 | `weatherSim`, `weatherSimInterval` | ignore the API and cycle the weather looks |
 | `tiles` | basemap re-fetch interval (`expireDays`), tile-border debug overlay |
 | `ground.style` | `'satellite'` (ESRI World_Imagery) or `'streets'` (ESRI World_Street_Map) |
 | `orbit` | figure-eight path, `radiusKm`, direction, reorientation, `altBob` |
 | `fog.distanceKm` | distance haze (0/false = off) |
-| `clouds` | deck height (`top`/`bottom` in world units), `density` per weather level, and `wind` motion from Open-Meteo |
+| `clouds` | deck height (`top`/`bottom` in world units), `density` per weather level, `wind` motion, soft edge/horizon fading, `maxMarchUnits` and `terrainOcclusion` |
 | `flights` | aircraft count, altitudes, speeds, destination weights, contrails, night strobes |
-| `terrain` | DEM mesh, `exaggeration`, edge fade/skirt, `outerDem`, `carLights`, `cityLights`, `wireframe` |
+| `terrain` | DEM mesh, `exaggeration`, edge fade/skirt, `outerDem`, distance-dependent `lod`, `carLights`, `cityLights`, `wireframe` |
 | `carLights` | road width, light sizes, lane separation, traffic range/fade, `trafficSide`, spacing, speed, density, brightness |
 | `lights` | twilight switching window of every artificial light (`offDeg`, `onDeg`, `softDeg`) |
 | `atmosphere` | turbidity, moon/star gains, night floor, albedo/sky/air gains, haze blocks, cloud albedo/haze, cloud shadows, terrain shadows |
@@ -280,6 +281,38 @@ Groups:
 (`y ≈ 1.16-2.70`). Cloud deck heights, fog distance and orbit radius are all
 expressed in these units or in km where noted.
 
+### Performance
+
+`CONFIG.performance` controls adaptive cloud raymarching:
+
+```javascript
+performance: {
+    adaptiveCloudMarch: true,
+    lowFps: 24,
+    highFps: 35,
+    minCloudMarchUnits: 45
+}
+```
+
+When the debug FPS drops below `lowFps`, the cloud march is shortened. When it
+stays above `highFps`, the march is restored toward `CONFIG.clouds.maxMarchUnits`.
+
+Other main performance knobs:
+
+- `renderScale`: lower internal 3D resolution.
+- `antialias: false`: disables MSAA.
+- `maxFps`: caps the animation loop.
+- `clouds.maxMarchUnits`: maximum cloud raymarch length.
+- `clouds.softEdges`, `edgeSoftness`, `horizonSoftness`: soft cloud edges;
+  disabling `softEdges` restores the old hard shell behaviour.
+- `terrain.lod`: distance-dependent terrain mesh LOD; fine near the centre,
+  coarser toward the border. Set `terrain.lod.enabled: false` for the old
+  uniform mesh grid.
+- `atmosphere.cloudShadows` and `atmosphere.terrainShadows`: disable if the
+  scene is GPU-bound.
+- `flights.count`, `flights.contrailChance`, `carLights.density`,
+  `emergencyVehicles.count`: reduce scene-object density.
+
 ### Themes and theme lighting
 
 A theme is a stylesheet plus an optional lighting block:

background.html

@@ -208,6 +208,11 @@
             overflow-x: hidden;
             overflow-y: auto;
             align-items: stretch;
+            scrollbar-width: none;
+        }
+
+        #info-panel::-webkit-scrollbar {
+            display: none;
         }
 
         @media (orientation: portrait) and (max-width: 700px) {
@@ -216,15 +221,15 @@
             }
         }
         #analog-clock {
-            width: 100%;
+            width: 78%;
             height: auto;
-            margin: 0 auto 0.4vh auto;
+            margin: 0 auto 0.35vh auto;
             display: block;
             flex-shrink: 0;
         }
         #digital-clock {
             text-align: center;
-            font-size: 1.3em;
+            font-size: 1.2em;
             letter-spacing: 0.12em;
             margin-bottom: 0.6vh;
             padding-bottom: 0.5vh;
@@ -679,6 +684,11 @@ window.addEventListener('resize', scheduleFitInfoPanel);
 
         var SITE_LAT = (window.CONFIG && window.CONFIG.location && window.CONFIG.location.lat) || 51.5074;
         var SITE_LON = (window.CONFIG && window.CONFIG.location && window.CONFIG.location.lon) || -0.1278;
+        // SunCalc.getPosition returns the geometric centre altitude. The
+        // scene's sunrise/sunset times use the standard apparent upper-limb
+        // altitude (-0.833 deg: refraction + solar semidiameter), so the
+        // lighting altitude is shifted by the same amount.
+        var SUN_HORIZON_CORR_RAD = 0.833 * Math.PI / 180;
 
         var realDayProgress = 0;
 
@@ -918,14 +928,15 @@ window.sunPalettes = [
         function getColor(t) {
             var now = sceneNow();
             var sunPos = SunCalc.getPosition(now, SITE_LAT, SITE_LON);
+            var sunAlt = sunPos.altitude + SUN_HORIZON_CORR_RAD;
             var moonIllum = SunCalc.getMoonIllumination(now);
 
             // The day palette covers sunAlt down to sunPalettes[0].alt
             // (-pi/2, deep below horizon). Only below that do we hand off
             // to the moon-based night palette. This makes twilight a
             // smooth transition through the day palette entries.
-            if (sunPos.altitude > window.sunPalettes[0].alt) {
+            if (sunAlt > window.sunPalettes[0].alt) {
-                return getDayColor(sunPos.altitude);
+                return getDayColor(sunAlt);
             } else {
                 return getNightColor(moonIllum);
             }
@@ -1981,7 +1992,8 @@ window.weatherThemes = {
             // Sun altitude in radians. Negative = below horizon (night).
             var _sunNow = sceneNow();
             var _sunPos = SunCalc.getPosition(_sunNow, SITE_LAT, SITE_LON);
-            window.__currentSunAlt = _sunPos.altitude;
+            var _sunAlt = _sunPos.altitude + SUN_HORIZON_CORR_RAD;
+            window.__currentSunAlt = _sunAlt;
             window.__currentSceneDate = _sunNow;
             window.__flightDow = _sunNow.getDay();
             // Unit vector towards the sun in world space. SunCalc azimuth
@@ -1990,9 +2002,9 @@ window.weatherThemes = {
             // World frame: +X = west, +Z = north, +Y = up -> east is -X.
             var _sunBearingR = _sunPos.azimuth + Math.PI;
             window.__currentSunDir = [
-                -Math.cos(_sunPos.altitude) * Math.sin(_sunBearingR),
+                -Math.cos(_sunAlt) * Math.sin(_sunBearingR),
-                Math.sin(_sunPos.altitude),
+                Math.sin(_sunAlt),
-                Math.cos(_sunPos.altitude) * Math.cos(_sunBearingR)
+                Math.cos(_sunAlt) * Math.cos(_sunBearingR)
             ];
             // ---- Local sidereal time -------------------------------------
             // Same formula SunCalc uses internally (Meeus): GMST in degrees

config.js

@@ -54,14 +54,22 @@ window.CONFIG = {
     theme: 'ash',                 // 'ash' | 'nord' | 'gruvbox' (see window.THEMES)
     // theme: 'nord'
     // theme: 'gruvbox'
-    language: 'en',               // 'en', 'de', 'it', 'es', 'fr', 'ru'
+    language: 'de',               // 'en', 'de', 'it', 'es', 'fr', 'ru'
     // language: 'de'
-    timeFormat: 'DD. MMMM, YYYY ‒ HH:mm:SS',
+    timeFormat: 'DD. MMMM YYYY',
     // timeFormat: 'YYYY-MM-DD HH:mm:ss'
     // timeFormat: 'dddd, DD. MMMM YYYY HH:mm'
     debug: 0,                     // 1 = debug panel + progress logs in the console
     // debug: 1
-    credits: true,                // false = hide the attribution line
+    credits: false,               // attribution line hidden
+
+    // Optional same-origin Overpass proxy probe. The public Overpass mirrors
+    // work directly from the browser; keep this false unless the background
+    // nginx proxy is known to be reachable and you want cached same-origin calls.
+    overpass: {
+        useProxy: false,          // true = probe /overpass/... and use it when available
+        // useProxy: true
+    },
     // credits: false
     units: { temperature: 'C' },  // 'F' for Fahrenheit
     // units: { temperature: 'F' }
@@ -74,14 +82,26 @@ window.CONFIG = {
     // and upscaled with image-rendering: pixelated, so it reads as pixel
     // art instead of a blurry rescale. The DOM UI stays crisp at any value.
     // 1 = native resolution (sharpest, most expensive).
-    renderScale: 0.5,             // 1 native, 0.5 pixel-art 2x, 0.25 4x
+    renderScale: 0.33,            // 1 native, 0.5 pixel-art 2x, 0.4/0.33/0.25 cheaper
     // Scene frame cap. All motion is time-based, so this only changes
     // smoothness, never speed. 0 = free running (vsync).
     maxFps: 30,                   // 0 = free running
     // MSAA on the WebGL framebuffer. Costs fill rate, and with renderScale
     // below 1 the pixel blocks dominate anyway - set false if the scene is
     // GPU bound. Read once at context creation, so a reload is needed.
-    antialias: true,              // false saves GPU fill rate
+    antialias: false,             // false saves GPU fill rate
+
+    // ------------------------------------------------------------------
+    // Performance
+    // ------------------------------------------------------------------
+    // Adaptive cloud raymarch: shortens the cloud march when the debug FPS
+    // drops, and lengthens it again when the scene stays comfortably fast.
+    performance: {
+        adaptiveCloudMarch: true,
+        lowFps: 24,               // reduce march below this FPS
+        highFps: 35,              // restore march above this FPS
+        minCloudMarchUnits: 45    // never shorten below this raymarch length
+    },
 
     // ------------------------------------------------------------------
     // Location
@@ -101,7 +121,7 @@ window.CONFIG = {
     // false = live Open-Meteo conditions (also used for the theme choice).
     // true  = cycle sunny -> cloudy -> stormy -> night, useful to compare
     //         all weather looks without waiting on the API.
-    weatherSim: true,             // test mode: fixed sunny weather
+    weatherSim: false,            // real Open-Meteo weather
     weatherSimInterval: 15000,    // ms per weather step when weatherSim is true
     // weatherSim: false, weatherSimInterval: 30000
     // Synthetic weather states used by weatherSim. Each state sets theme,
@@ -147,6 +167,58 @@ window.CONFIG = {
         // emergencyVehicles: { colorVariation: 0.25, ledColor: [0.02, 0.18, 1.0], halogenColor: [0.70, 0.82, 1.0] }
     },
 
+    // ------------------------------------------------------------------
+    // Meteor showers
+    // ------------------------------------------------------------------
+    // Known meteor showers are rendered as short night-sky streaks whose
+    // backward extension points toward the shower radiant. The debug shower
+    // is a temporary test shower for a fixed local start time.
+    meteorShowers: {
+        enabled: true,
+        brightness: 1.0,
+        maxActive: 12,
+        rate: 0.25,             // meteors per second across all active showers
+        speedDegPerSec: 14,     // apparent angular speed
+        lengthDeg: 18,          // trail length in degrees
+        trailPoints: 14,        // point sprites per trail
+        pointSize: 10,          // base point size in pixels
+        nightOnly: true,
+        colors: [
+            [1.00, 0.96, 0.88],
+            [0.72, 1.00, 0.86],
+            [1.00, 0.72, 0.42]
+        ],
+        debug: {
+            enabled: false,
+            name: 'Debug Shower',
+            startAt: '2026-10-13T07:00:00',
+            durationMin: 10,
+            rate: 8.0,
+            maxActive: 100,
+            radiant: { raH: 3.2, decDeg: 58 },
+            lengthDeg: 22,
+            speedDegPerSec: 18,
+            brightness: 2.4,
+            nightOnly: false
+        },
+        showers: [
+            { name: 'Quadrantids', startMonth: 1, startDay: 1, peakMonth: 1, peakDay: 3, endMonth: 1, endDay: 15, zhr: 110, raH: 15.4, decDeg: 49 },
+            { name: 'Lyrids', startMonth: 4, startDay: 16, peakMonth: 4, peakDay: 22, endMonth: 4, endDay: 25, zhr: 18, raH: 18.1, decDeg: 34 },
+            { name: 'Eta Aquariids', startMonth: 4, startDay: 19, peakMonth: 5, peakDay: 6, endMonth: 5, endDay: 28, zhr: 50, raH: 22.5, decDeg: -1 },
+            { name: 'Delta Aquariids', startMonth: 7, startDay: 15, peakMonth: 7, peakDay: 30, endMonth: 8, endDay: 18, zhr: 25, raH: 22.8, decDeg: -16 },
+            { name: 'Perseids', startMonth: 7, startDay: 17, peakMonth: 8, peakDay: 12, endMonth: 8, endDay: 24, zhr: 100, raH: 3.2, decDeg: 58 },
+            { name: 'Draconids', startMonth: 10, startDay: 6, peakMonth: 10, peakDay: 8, endMonth: 10, endDay: 10, zhr: 10, raH: 17.5, decDeg: 54 },
+            { name: 'Orionids', startMonth: 10, startDay: 2, peakMonth: 10, peakDay: 21, endMonth: 11, endDay: 7, zhr: 20, raH: 6.4, decDeg: 15 },
+            { name: 'Taurids', startMonth: 10, startDay: 10, peakMonth: 11, peakDay: 5, endMonth: 12, endDay: 10, zhr: 5, raH: 3.9, decDeg: 21 },
+            { name: 'Leonids', startMonth: 11, startDay: 6, peakMonth: 11, peakDay: 17, endMonth: 11, endDay: 30, zhr: 15, raH: 10.2, decDeg: 22 },
+            { name: 'Geminids', startMonth: 12, startDay: 4, peakMonth: 12, peakDay: 14, endMonth: 12, endDay: 17, zhr: 120, raH: 7.5, decDeg: 33 },
+            { name: 'Ursids', startMonth: 12, startDay: 17, peakMonth: 12, peakDay: 22, endMonth: 12, endDay: 26, zhr: 10, raH: 14.5, decDeg: 75 }
+        ]
+        // meteorShowers: { enabled: false }
+        // meteorShowers: { debug: { enabled: false } }
+        // meteorShowers: { debug: { startAt: '2026-10-13T07:00:00', durationMin: 10, rate: 2.0 } }
+    },
+
     // ------------------------------------------------------------------
     // Weather effects
     // ------------------------------------------------------------------
@@ -269,15 +341,33 @@ window.CONFIG = {
     // altitude so aircraft fly above the deck.
     clouds: {
         enabled: true,            // false removes the volumetric cloud deck
-        top: 1.0,                 // ~12.9 km
+        top: 0.78,                // ~10.1 km, lower deck keeps camera clearance
         bottom: -0.2,             // ~-2.6 km (deck base slightly below terrain)
+        nearFade: {
+            enabled: false,       // test: disable the cloud-free near bubble
+            start: 0.0,           // world units: clouds fade out very close to camera
+            end: 0.1              // full density from this distance onward
+        },
+        // Soft cloud edges: instead of a hard shell boundary, the deck fades
+        // vertically and near grazing horizon rays. This targets the visible
+        // cloud-deck ring without changing the actual cloud top/bottom.
+        softEdges: true,
+        edgeSoftness: 0.18,       // world units of vertical soft padding
+        horizonSoftness: 6.0,     // path-length fade for grazing cloud rays
+        maxMarchUnits: 80,        // raymarch cap; 30 was the old fixed cap
+        // softEdges: false        // old hard-edged shell behaviour
+        // Terrain occlusion for clouds. false draws clouds in front of the
+        // terrain mesh even when terrain is closer; true clips cloud rays
+        // against the terrain distance buffer.
+        terrainOcclusion: false,  // inverted occlusion: clouds stay in front
+        // terrainOcclusion: true
         // Coverage per weather level, 0 = clear, 1 = overcast. Only the
         // levels listed here override the built-in defaults
         // (sunny 0.20, cloudy 0.70, stormy 0.80, night 0.45). Live weather
         // only ever reports sunny/cloudy/stormy, so the deck keeps that
         // coverage through the night as well - 'night' is used by the weather
         // simulation (weatherSim: true) alone.
-        density: { sunny: 0.25, cloudy: 0.50, rain: 0.75, snow: 0.65, stormy: 0.80 },
+        density: { sunny: 0.25, cloudy: 0.50, rain: 0.45, snow: 0.65, stormy: 0.80 },
         // 'night' intentionally has no own density: it follows the last
         // non-night weather density (sunny/cloudy/stormy).
         // Cloud motion from Open-Meteo wind. Open-Meteo reports wind FROM
@@ -292,6 +382,7 @@ window.CONFIG = {
             // wind: { speedScale: 140, maxSpeed: 0.12 } // very visible motion
         }
         // density: { sunny: 0.05, cloudy: 0.9, rain: 0.95, snow: 0.85, stormy: 1.0 }
+        // top: 0.65, nearFade: { start: 0.5, end: 3.5 }
     },
 
     // ------------------------------------------------------------------
@@ -331,7 +422,7 @@ window.CONFIG = {
         enabled: true,            // false removes aircraft and contrails
         altitudeKm: 14,           // cruise altitude
         climbKm: 100,             // climb/descent run to and from cruise
-        count: 21,                // simultaneous aircraft (max 240)
+        count: 6,                 // simultaneous aircraft (max 240)
         speedKmh: 850,            // mean ground speed
         speedVar: 0.18,           // +/- speed deviation (0..0.5)
         minLegKm: 60,             // shortest leg (no taxi hops)
@@ -345,9 +436,14 @@ window.CONFIG = {
         contrailChance: 1.00,     // 0 = no contrails, 1 = every eligible jet
         contrailStartKm: 4,       // start after this distance from the airport
         contrailLifeS: 300,       // seconds before a trail disappears
-        contrailWidthM: 1400,     // full trail width
+        contrailWidthM: 1400,     // aircraft/trail scale width
+        contrailEngineWidthM: 700, // width of each engine contrail
+        contrailEngineOffset: { x: 0.36, y: -0.055, z: -0.14 }, // engine exhaust in model units
+        markingLightOffset: { x: 0.0, y: 0.235, z: 0.0 },       // top-centre fuselage beacon
         contrailFadeKm: 300,      // fully faded at this distance (ramp starts at 35 %)
         // contrailChance: 0.35, contrailLifeS: 120  // short sparse trails
+        // contrailEngineWidthM: 520, contrailEngineOffset: { x: 0.36, y: -0.055, z: -0.18 }
+        // markingLightOffset: { x: 0.0, y: 0.26, z: 0.05 }
         // Night contrast: a physically scaled contrail is a faint grey thread
         // that disappears at 4x pixel scale, so this is the night share of its
         // opacity (0.34 was the old value) and it also drives the gain on the
@@ -379,6 +475,16 @@ window.CONFIG = {
         edgeSkirtKm: 800,         // coarse outer terrain pulled past the horizon
         edgeSkirtRings: 24,       // coarse rings in the outer skirt
         edgeSkirtNoise: 0.28,     // fallback height variation if outer DEM is off
+        // Distance-dependent terrain mesh LOD: fine near the mosaic centre,
+        // coarser toward the border. The outer skirt remains the farthest LOD.
+        lod: {
+            enabled: true,
+            nearStepPx: 32,       // mesh vertex spacing near the centre
+            farStepPx: 96,        // mesh vertex spacing near the border
+            innerTiles: 8,        // fully fine area around the centre
+            outerTiles: 20        // fully coarse area toward the border
+            // lod: { enabled: false } // old uniform mesh
+        },
         outerDem: {
             enabled: true,        // false uses procedural fallback heights
             zoom: 7,              // reduced-resolution terrarium zoom for the skirt
@@ -416,17 +522,17 @@ window.CONFIG = {
         // 'auto' derives the driving side from the location (left in the UK,
         // Japan, Australia, India, southern Africa, ...), 'left'/'right' forces it.
         trafficSide: 'auto',
-        dashM: 620,               // mean vehicle spacing on motorways
+        dashM: 800,               // mean vehicle spacing on motorways
                                   // side roads use dashM * 2.4
         // dashM: 350              // denser traffic
         // dashM: 1200             // sparse traffic
         spreadKm: 45,             // gaussian sigma around the motorway network
-        spreadFloor: 0.30,        // share that far side roads keep
+        spreadFloor: 0.40,        // share that far side roads keep
         speed: 1.0,               // flow speed multiplier
-        density: 0.25,            // vehicle density multiplier
+        density: 0.225,           // vehicle density multiplier
         brightness: 1.0,          // vehicle light intensity
         motorwayDensity: 0.95,    // share of the density budget on motorways/trunk
-        sideDensity: 0.35,        // share of the density budget on primary/secondary/tertiary
+        sideDensity: 0.55,        // share of the density budget on primary/secondary/tertiary
         sideDashFactor: 3.2,      // wider spacing on side roads: fewer local cars
         // Time-based traffic profile. Values are multipliers around the
         // configured density. Times are local scene-clock hours.
@@ -445,7 +551,7 @@ window.CONFIG = {
             sundayEveningPeak: 18.5,
             sundayEveningWidth: 1.8,
             sundayEveningGain: 0.85, // commuter return traffic
-            nightReduction: 0.70  // deep-night traffic reduced to 30 %
+            nightReduction: 0.85  // deep-night traffic reduced to 15 %
             // timeProfile: { enabled: false }
             // timeProfile: { morningGain: 0.8, eveningGain: 1.0, nightReduction: 0.85 }
         }
@@ -597,7 +703,19 @@ window.CONFIG = {
     // drawn larger so it reads as a disc; the surface brightness and the
     // scene lighting are NOT scaled with it.
     sun: {
-        angularRadius: 0.0558     // 12x the physical 0.00465 rad
+        angularRadius: 0.0279,    // 6x the physical 0.00465 rad
+        brightness: 2.1,          // sun disc/glow gain
+        glow: {
+            enabled: true,
+            core: 1.15,           // bright inner corona
+            inner: 0.95,          // warm near halo
+            outer: 0.38,          // soft far halo
+            outerRadius: 11.0,    // outer halo radius in sun-disc radii
+            color: [1.00, 0.78, 0.36]
+        }
+        // angularRadius: 0.0558, brightness: 1.0
+        // angularRadius: 0.0140, brightness: 2.4
+        // glow: { core: 1.6, inner: 1.4, outer: 0.55, outerRadius: 14.0 }
     },
 
     // ------------------------------------------------------------------
@@ -636,8 +754,8 @@ window.CONFIG = {
     // time, 1440 = one simulated day per minute. Clock hands, digital readout,
     // weather and sky all use the same clock. Hash overrides: #at=... #speed=...
     day: {
-        startAt: '2026-10-13T06:59:00', // frozen test clock
+        startAt: null,               // real time
-        speed: 0                     // frozen time
+        speed: 1                     // real time
         // startAt: null, speed: 1   // real time
     },