diff --git a/plugin/contents/ui/dancer.html b/plugin/contents/ui/dancer.html
index 169f8bc..d94cba8 100644
--- a/plugin/contents/ui/dancer.html
+++ b/plugin/contents/ui/dancer.html
@@ -1262,6 +1262,33 @@ const HORIZON_F   = 0.585;  // fração da altura da tela até o horizonte
 const TWINKLE_MAG = 4.0;    // até esta magnitude a estrela cintila; acima é estática
 const DEG         = Math.PI / 180;
 window.__skyTimeOffset = 0; // debug: ms somados ao relógio p/ testar a rotação
+let skyTimeScale = 1;
+let skyClockRealMs = Date.now();
+let skyClockSimMs = skyClockRealMs;
+
+function skyNowMs() {
+  const realNow = Date.now();
+  return skyClockSimMs + (realNow - skyClockRealMs) * skyTimeScale +
+         window.__skyTimeOffset;
+}
+
+function setSkyTimeScale(scale) {
+  const realNow = Date.now();
+  scale = Number(scale);
+  if (!Number.isFinite(scale) || scale < 1) scale = 1;
+  if (scale === skyTimeScale) return;
+  if (scale === 1 || skyTimeScale === 1) {
+    /* Entrar e sair da prévia sempre parte do instante real, sem deixar o
+       wallpaper preso no futuro simulado. */
+    skyClockSimMs = realNow;
+  } else {
+    skyClockSimMs += (realNow - skyClockRealMs) * skyTimeScale;
+  }
+  skyClockRealMs = realNow;
+  skyTimeScale = scale;
+  lastProjMs = -Infinity;
+  projectSky();
+}
 
 /* Tempo sideral local em graus (GMST + longitude leste) */
 function localSiderealDeg(ms) {
@@ -1598,7 +1625,7 @@ function projectSky() {
   }
   const bctx = renderCanvas.getContext('2d');
   bctx.clearRect(0, 0, W, bufferH);
-  const lst       = localSiderealDeg(Date.now() + window.__skyTimeOffset);
+  const lst       = localSiderealDeg(skyNowMs());
   const glareOn   = !document.body.classList.contains('balada') &&
                     !document.body.classList.contains('chuva');
   const nextTwinkList = [];
@@ -1684,7 +1711,8 @@ function resizeCanvas() {
 }
 
 function drawStars(ts) {
-  if (ts - lastProjMs > 30000) { lastProjMs = ts; projectSky(); }
+  const projectionInterval = skyTimeScale > 1 ? 4000 : 30000;
+  if (ts - lastProjMs > projectionInterval) { lastProjMs = ts; projectSky(); }
   ctx.clearRect(0, 0, canvas.width, canvas.height);
   const transition = Math.max(0, Math.min(1,
     (ts - skyTransitionStart) / SKY_TRANSITION_MS));
@@ -1714,6 +1742,22 @@ function drawStars(ts) {
 
 window.addEventListener('resize', resizeCanvas);
 
+/* Prévia temporal controlada por toggle-sky-timelapse.sh. Em 360x, uma hora
+   sideral passa em dez segundos e o ciclo diário leva quatro minutos. */
+let skyTimeScaleFileVal = null;
+(function pollSkyTimeScaleFile() {
+  fetch('file:///tmp/skeledance-sky-timescale?t=' + Date.now())
+    .then(r => r.text())
+    .then(t => {
+      const v = t.trim();
+      if (v === skyTimeScaleFileVal) return;
+      skyTimeScaleFileVal = v;
+      setSkyTimeScale(v);
+    })
+    .catch(() => {})
+    .finally(() => setTimeout(pollSkyTimeScaleFile, 800));
+})();
+
 /* ============================================================
    FLOOR CANVAS — perspective grid with true vanishing point
    ============================================================ */
diff --git a/toggle-sky-timelapse.sh b/toggle-sky-timelapse.sh
new file mode 100755
index 0000000..a0f8aaa
--- /dev/null
+++ b/toggle-sky-timelapse.sh
@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+STATE_FILE=/tmp/skeledance-sky-timescale
+
+if [ "$(cat "$STATE_FILE" 2>/dev/null)" = "360" ]; then
+  printf '1\n' > "$STATE_FILE"
+  printf 'Céu em tempo real\n'
+else
+  printf '360\n' > "$STATE_FILE"
+  printf 'Céu acelerado 360x (1 hora a cada 10 segundos)\n'
+fi