style: trim the interlude to about 1.5 s

src/scene/world/environment.ts

@@ -649,7 +649,7 @@ const OUTRO_RETURN_SECONDS = 1.6;
 const OUTRO_REACH = 0.62;
 const ENGINE_OFF_NIGHT = new THREE.Color(0x000000);
 /** Plates rise back over 720 ms with up to three 90 ms staggers. */
-const INTERLUDE_RISE_MS = 1100;
+const INTERLUDE_RISE_MS = 800;
 
 function easeInOutCubic(t: number): number {
   return t < 0.5 ? 4 * t * t * t : 1 - Math.pow(-2 * t + 2, 3) / 2;

src/scene/world/sign.ts

@@ -47,8 +47,12 @@ const TILT_RADIANS = 0.07;
 const HANDOFF_MS = 200;
 /** Above this scroll drive speed a passive crossing skips the interlude. */
 const BRISK_DRIVE_SPEED = 0.5;
-/** Share of the approach spent on the truss before the arc into the window. */
-const ON_TRUSS = 0.7;
+/** Share of the approach spent on the truss before the arc into the window.
+ * Round 6 trimmed the hold so the arc carries more of the approach. */
+const ON_TRUSS = 0.62;
+/** The reading plates start to rise about 180 ms (of a 900 ms approach)
+ * before the sign docks, so the interlude closes in about 1.5 s. */
+const PLATE_RISE_PROGRESS = 0.8;
 
 const SIGN_MARKER_FONT =
   '600 60px "Geist Mono Variable", ui-monospace, monospace';
@@ -524,7 +528,8 @@ export function createSign(
       return state;
     },
     interlude() {
-      return !brisk && state === 'incoming';
+      if (brisk || state !== 'incoming') return false;
+      return !(snapshot?.phase === 'approach' && snapshot.progress >= PLATE_RISE_PROGRESS);
     },
     compose(camera, width, height, dock, now, tilt = REST_TILT) {
       const dt = Math.min(0.05, Math.max(0, (now - previousNow) / 1000));