Baton

One home, four screens in four corners of it: a task started on the phone is handed off as a hot-white and electric-blue light trail that crosses the room to the tablet, the wall display and the laptop, so the sync is literally light moving through the loft.

A loft at dusk: steel factory windows onto a lit skyline, board-formed concrete, a brick wall, ceiling beams and a reflective polished concrete floor, with a kitchen island under three dome pendants, a sofa and floor lamp, a credenza and a desk by the window; cool sky light outside, warm practicals inside, and a hot streak of light leaping across the room. Seven 8 s beats over 58 s at 120 bpm, each a glide or swing chasing the streak corner to corner, rising to a room-wide view and a final push to the windows with an impact.

Length: 58 s
Scenes: 7
Device: iphone, ipad, laptop
Style: realistic place
Camera: continuous take, establishing wide, dolly, tracking, push in, ultra closeup

//
    NOTE (2026-10-15): converted from a presentation to a continuous video: the per-scene pause
    markers were removed, so "slide" below just means "scene" and nothing waits for Space.
    BATON — "Pass it on" · presentation #9, MULTI-DEVICE RELAY (7 slides, 58 s, no VO)
    Preview: http://localhost:4444/runtime?project=projects/references/ref-og-09-device-relay/ref-og-09-device-relay.promo

    PRODUCT  Baton (fictional): notes & tasks that sync instantly across every device.
             Accent electric blue #3B82F6 with a hot-white light trail.
    WORLD    A loft apartment at blue hour. Black-steel factory windows along the back wall
             (z -3800), a generated blue-hour skyline photo 30 m outside, board-formed concrete,
             a dark brick right wall, black ceiling beams, polished concrete floor (reflector).
             Kitchen island left (phone on an oak dock), living area centre (sofa + tablet),
             wall display right (browser window), desk by the window (laptop).
    PROPS    generated: relay-sofa 2300 · relay-stool 760 ×3 ·
             relay-pendant 380 ×3 · relay-floor-lamp 1600 · relay-plant 1900/1400 ·
             relay-chair 820 · relay-mug 100 · relay-books 230 · relay-vase 320 · relay-bowl 280.
             Everything else (shell, windows, island, desk, credenza, display, dock) is primitives.
    LIGHT    cool sky area at the glass + a cold city spot through the window grid (shadows),
             warm practicals (three pendant spots, the floor lamp, a desk spot), the screens as
             small cool areas. No tone curve (sRGB), bloom lifts the practicals and the trail.
    TRAIL    the transition device: two `streak`s on identical targets (hot-white core + a wide
             electric-blue halo) + a keyed point light riding along + a landing flash. Targets
             were checked against a re-implementation of light-streak.ts's 120 Hz spring
             (agility 40, damping 12.6 = critical): launch 0.6 s, apex ~1.2 s, lands ~2.0 s.
    SLIDES   every scene opens on the previous scene's final camera pose (transition=none, the
             cut is invisible) and ends on a settled poster frame; pause marker = duration - 0.04.
      s1-hook     8  wide dolly through the loft           Ideas don't stay put.
      s2-phone    8  island -> composer types, task lands  Start it on your phone.
      s3-tablet   8  trail phone -> sofa, detail assembles  Pick it up on the sofa.
      s4-browser  8  trail sofa -> wall display, card grows Open it on the big screen.
      s5-laptop  10  trail -> desk, ULTRA on the checkbox   Finish it at your desk.
      s6-proof    8  room-wide, arcs link all four screens  Four screens. One list.
      s7-cta      8  the trail lands in the Baton mark      Baton · Pass it on.
    SCREENS  pres-device-relay.screens.html -> scripts/html-screens.mts -> pasted below (static
             parts as templates, animated items carry their tracks per scene). The wall display
             is a free-standing ui3d panel (its browser chrome drawn in the HTML) inside a black
             primitive bezel: a scaled <chrome> window painted its own page backing over half of
             the board at this camera angle. Devices that are only background in a scene wear a
             LITE screen (same converted cards, fine print cut) to keep the scene's UI small.
    RENDERER renderer=webgl: on the default WebGPU path the screens' textures went blank a
             moment after their first frame (worst on the pause frames, which are re-painted);
             on WebGL every pause frame holds (verified by re-seeking each one three times).
    SOUND    music/pres-device-relay-bed (procedural, 120 BPM, D major, -16 LUFS) + designed sfx
             in media/ (relay-leap-r/-l, relay-land, relay-glide, relay-riser, relay-impact,
             relay-room) + engine UI sounds on every on-screen change.
promo#ref-og-09-device-relay(width=1920 height=1080 fps=30 renderer=webgl)
  audio