echo-compression

ECHO COMPRESSION — new-scenes shot 21 (Act IV · time as physical material), built off images/rows/h3a_r2.png: a row of glass-and-amber exposures on steel rods receding down a dark hall · the row packing together · one amber ring fused behind the phone as its halo.

Read the rig's notes

THE CLAIM. One emissive capsule crosses the scene ONCE, along one straight
line from the far end of the hall to a point just behind the phone. Twelve
solid chronophotographic exposures follow the SAME path evaluated at
t − τᵢ(t). They never get a track of their own: every row in this file is
the crossing function sampled at a re-solved time,

    τᵢ(t) = τᵢ(0) · (1 − smoothstep(1.6, 5.4, t)),   τᵢ(0) = 0.6 s · i

so the exposures do not move closer — their sampling times collapse, and
the row packs up against the head because the moments it records converge.
At τ → 0 the twelve are coincident on the head; a 0.6 s crossfade hands
them to a single torus, which is the continuous ring the discrete moments
fused into. The sheet shows that ring face-on around the device, so it is
authored face-on (the plan's edge-on turn is not taken).

THE APPARATUS, read off the sheet: each exposure is a thick glass lens disc
(cylinder r 95, 16 thick, turned to face the lens) with the capsule
burning inside it, threaded on a steel rod standing on a machined foot on
the floor. The rod and foot ride the same re-solved rows, so the whole
stand travels as one exposure — the picture is a row of instruments, not
floating glass.

BEATS (scene seconds):
  -7.4 → 4.6   the crossing (starts before the scene; at 0 the head is 62 % along)
  1.6 → 5.4   sampling times collapse — the row packs toward the head
  5.4 → 6   fuse: exposures out, ring in (scale 0.4 → 1 as it closes)
  capture beats: 0.4 (the row) · 3.6 (packing) · 6.2 (the halo)

LOOK — the new-scenes house grammar (plan §2): one accent (#ffb347), a cool
rim (#7ad7ff), three matched haze lobes down the hall as the medium the
row is seen through, a reflector-ground floor for the sheet's reflections,
four dark columns for the hall, fog tinted to the background. Post ladder
row 21: bloom 1.05 at threshold 0.74 — the highest in the reel bar none,
because the shot is twelve amber cores in glass. camera_dof named so grain
lands after the lens; fxaa last. Shadow maps off.

TRAPS PAID: a device node is its CENTRE (y = 79.75 stands the phone on the
floor); a lens over a near-black stage renders black at high transmission,
and transmission renders opaque grey in the capture path, so the lens is a
plain-alpha clearcoat disc (opacity 0.4) with the haze lobes BEHIND it; the ring lands at 6, half a second before the
cut, so nothing hides under the reel's temporal-echo gap.

IN THE REEL this scene runs transition=temporal-echo (0.6 s) into s22 —
the shot's own argument used as a wipe. Standalone here, so transition=none.

NO AUDIO — primitives scene; add at assembly time.

Capture: nx run tools:capture:webgl -- --project promos/primitives/scenes/abstract/new-scenes/echo-compression.promo --width 1920 --height 1080 --times "0.4,3.6,6.2"
Preview: /packages/runtime/index.html?project=promos/primitives/scenes/abstract/new-scenes/echo-compression.promo

Topic: scenes
Scenes: 1
Kind: reference rig

//
    ECHO COMPRESSION — new-scenes shot 21 (Act IV · time as physical material),
    built off images/rows/h3a_r2.png: a row of glass-and-amber exposures on
    steel rods receding down a dark hall · the row packing together · one amber
    ring fused behind the phone as its halo.

    THE CLAIM. One emissive capsule crosses the scene ONCE, along one straight
    line from the far end of the hall to a point just behind the phone. Twelve
    solid chronophotographic exposures follow the SAME path evaluated at
    t − τᵢ(t). They never get a track of their own: every row in this file is
    the crossing function sampled at a re-solved time,

        τᵢ(t) = τᵢ(0) · (1 − smoothstep(1.6, 5.4, t)),   τᵢ(0) = 0.6 s · i

    so the exposures do not move closer — their sampling times collapse, and
    the row packs up against the head because the moments it records converge.
    At τ → 0 the twelve are coincident on the head; a 0.6 s crossfade hands
    them to a single torus, which is the continuous ring the discrete moments
    fused into. The sheet shows that ring face-on around the device, so it is
    authored face-on (the plan's edge-on turn is not taken).

    THE APPARATUS, read off the sheet: each exposure is a thick glass lens disc
    (cylinder r 95, 16 thick, turned to face the lens) with the capsule
    burning inside it, threaded on a steel rod standing on a machined foot on
    the floor. The rod and foot ride the same re-solved rows, so the whole
    stand travels as one exposure — the picture is a row of instruments, not
    floating glass.

    BEATS (scene seconds):
      -7.4 → 4.6   the crossing (starts before the scene; at 0 the head is 62 % along)
      1.6 → 5.4   sampling times collapse — the row packs toward the head
      5.4 → 6   fuse: exposures out, ring in (scale 0.4 → 1 as it closes)
      capture beats: 0.4 (the row) · 3.6 (packing) · 6.2 (the halo)

    LOOK — the new-scenes house grammar (plan §2): one accent (#ffb347), a cool
    rim (#7ad7ff), three matched haze lobes down the hall as the medium the
    row is seen through, a reflector-ground floor for the sheet's reflections,
    four dark columns for the hall, fog tinted to the background. Post ladder
    row 21: bloom 1.05 at threshold 0.74 — the highest in the reel bar none,
    because the shot is twelve amber cores in glass. camera_dof named so grain
    lands after the lens; fxaa last. Shadow maps off.

    TRAPS PAID: a device node is its CENTRE (y = 79.75 stands the phone on the
    floor); a lens over a near-black stage renders black at high transmission,
    and transmission renders opaque grey in the capture path, so the lens is a
    plain-alpha clearcoat disc (opacity 0.4) with the haze lobes BEHIND it; the ring lands at 6, half a second before the
    cut, so nothing hides under the reel's temporal-echo gap.

    IN THE REEL this scene runs transition=temporal-echo (0.6 s) into s22 —
    the shot's own argument used as a wipe. Standalone here, so transition=none.

    NO AUDIO — primitives scene; add at assembly time.

    Capture: nx run tools:capture:webgl -- --project promos/primitives/scenes/abstract/new-scenes/echo-compression.promo --width 1920 --height 1080 --times "0.4,3.6,6.2"
    Preview: /packages/runtime/index.html?project=promos/primitives/scenes/abstract/new-scenes/echo-compression.promo
promo#echo-compression(width=1920 height=1080 fps=30)
  // the reel's shared material block (plan §2.3), carried whole so this file
  // verifies and grades on its own
  materials
    physical#clearcoat(color=#15161a metalness=0 roughness=0.45 clearcoat=1 clearcoat-roughness=0.06 envmap-intensity=1.1)
    standard#metal(color=#d8d8dc metalness=1 roughness=0.22 envmap-intensity=1.25)
    standard#clay(color=#9c9689 metalness=0 roughness=0.95)
    lambert#chalk(color=#cfc7b6)
    basic#emissive(color=#ffb347 toneMapped=false)
    physical#glass(color=#dfefff metalness=0 roughness=0.05 transmission=0.88 thickness=70 ior=1.5 clearcoat=0.9