{
  "title": "SPARK",
  "duration_seconds": 15,
  "aspect_ratio": "16:9",
  "dialogue": false,
  "workflow": "Original generated style frame and revision, two Kling 3.0 Pro motion-and-sound takes, then an original vector FX composite and loudness-normalized final cut.",
  "style_frame": "/assets/style-v2.png",
  "original_frames": [
    "/assets/style-v1.png",
    "/assets/style-v2.png"
  ],
  "model": "fal-ai/kling-video/v3/pro/image-to-video",
  "animation_prompt": "One continuous 15-second cinematic animated shot, same mechanical moth and workshop as the starting image. Closely match Arcane / Fortiche painterly hybrid 3D and hand-drawn 2D visual language. Keep directional brushstrokes locked to all surfaces, matte illustrated brass, angular painted shadow planes, deep indigo/plum shadows, amber task-lamp key and concentrated cyan crystal light. No photorealism, no polished CGI. Four leaf-like wings, six slender jointed brass legs, one faceted crystal thorax; keep the same design throughout.\n0-3s: quiet anticipation, camera smoothly inches toward the dormant moth. One antenna trembles and two tiny hinge clicks break the silence. The crystal is dark.\n3-7s: a small blue ember pulses inside the crystal, grows to a cyan heart-light illuminating brass ribs. The moth braces on its legs, and four wings deliberately unfold in an angular strong pose with briefly held mechanical beats.\n7-10s: it compresses down into an unmistakable crouch, pauses, then snaps upward into flight in one energetic release. One painted cyan-white flash and a burst of flat hand-drawn golden tapered sparks, graphic blue arcs and broken wisps follow its takeoff. Wings use held stylized poses, crisp snappy timing and one graphic smear at launch rather than realistic motion blur.\n10-15s: the camera smoothly rises and eases back to follow the moth hovering above the table against the dark window, never losing the moth from view. It banks gently, silhouetted by a cool rim. Painted sparks curl and fall onto the tabletop. End on a clear heroic hovering pose with the core alive and the room quiet.\nCamera smooth on ones; moth and drawn effects on twos, not slow motion. Painted depth and shallow focus, no cuts, no zoom transitions. Sound: intimate cinematic synchronized brass ticking, wing-rib clicks, crystalline ringing energy buildup, a sharp airy metallic takeoff, fluttering wing beats and fizzy spark tails, subtle midnight room tone. No voices, no dialogue, no singing, no music, no text.",
  "negative_prompt": "photorealistic, glossy plastic, smooth generic CGI, realistic particle simulation, extra limbs, changing wing count, humanoid, dialogue, voice, music, text, watermark, cuts, camera shake, disappearing moth",
  "sources": [
    {
      "title": "Fortiche technique FAQ",
      "url": "https://forticheprod.com/faq/"
    },
    {
      "title": "Fortiche Season 2 production breakdowns",
      "url": "https://forticheprod.com/portfolio/arcane-season-2/"
    },
    {
      "title": "Netflix artist interviews and reference gallery",
      "url": "https://www.netflix.com/tudum/features/arcane-season-two-behind-the-scenes"
    },
    {
      "title": "First-person animation supervisor interview",
      "url": "https://blog.syncsketch.com/creator-stories/arcane-fortiche/"
    }
  ],
  "style_review": [
    "Compared the initial and revised frames with two official Fortiche concept-art plates in Netflix\u2019s gallery. The gallery is a visual-development reference, not a final animation-frame reference.",
    "Revision adds angular brush planes, matte lamp shading and broader violet strokes on the wings. Tiny metal hinge reflections remain more physical than the flatter concept-art references."
  ],
  "limitations": [
    "The generated moth remains more smoothly animated than the requested poses on twos. Added vector effects are on twos, but the native effects are not separately authored or controllable.",
    "This is an original style study with visible differences from Arcane. No editable model, rig, UV maps or Blender project is provided."
  ],
  "cuts": [
    {
      "cut": "01",
      "media_url": "/assets/spark-v1.mp4",
      "contact_sheet_url": "/assets/contact-sheet-v1.jpg",
      "cost_usd": 2.52,
      "duration_seconds": 15.042,
      "fps": 24,
      "width": 1916,
      "height": 1080,
      "audio": "AAC stereo 44.1 kHz",
      "sha256": "82fa640e0e48ac53ef2c0d0b8077e5a661e59a45334fbe583eb87c99cf047dd5",
      "review": [
        "The workshop, lamp, and moth retain the warm amber / indigo palette and visible painted scratches throughout the sampled frames. The sequence communicates wake, wing unfolding, energy release, and hovering flight.",
        "Cut 01 differences: wing beats become smooth motion-blurred shapes rather than crisp held poses; the core briefly blooms into a tall flame-like crystal; the flying abdomen reads more like a wasp. Metal hinge reflections and spark bloom remain more physically rendered than the reference concept-art planes.",
        "The native soundtrack is present for the full 15 seconds in stereo. Signal inspection found no clipped samples, and its largest energy peak occurs during the ignition / takeoff around 8\u20139 seconds. This is a technical audio check, not a listening-quality judgment.",
        "A second render is being prepared with clearer held wing poses, a compact core, stable moth proportions, and sparse graphic sparks. The original cut is preserved."
      ],
      "label": "Cut 01"
    },
    {
      "cut": "02",
      "label": "Cut 02",
      "media_url": "/assets/spark-v2.mp4",
      "contact_sheet_url": "/assets/contact-sheet-v2.jpg",
      "cost_usd": 2.52,
      "animation_prompt": "Animate this original illustration as a single continuous 15-second painterly cinematic shot. Arcane / Fortiche visual language: matte hand-painted brass, graphic angular shading, visible brush strokes anchored to surfaces, deep plum/indigo shadows, warm amber lamp, concentrated cyan light. Camera smoothly moves but articulated mechanical wings visibly HOLD crisp separate poses like stop-motion on twos. Preserve the moth exactly: compact faceted blue crystal BETWEEN four leaf-shaped brass-edged painted wings, short small abdomen, six thin jointed legs. No elongated wasp body, no added face, no extra wings. The crystal always keeps its original solid faceted shape and size. It glows from INSIDE: never sprouts a flame, plume, spike, or extra crystals.\n0-3 seconds: quiet workbench; one slight antenna twitch; tiny hinge clicks. Smooth restrained camera push.\n3-6 seconds: a tiny inner cyan ember pulses, then lights the original compact crystal. Four rigid painted wings unfold one at a time with readable held angular poses and brief pauses. Clear silhouette; brush detail remains sharp.\n6-8 seconds: legs lower the compact body into one strong crouch. It holds for a half-second then launches with a fast decisive upward snap. A sparse burst of flat illustrated cyan wedges and gold ink-like flecks accents takeoff, graphic broken outlines, clean angular shapes, no continuous glowing ribbons or realistic particle cloud.\n8-15 seconds: the small moth hovers above the workbench in front of the dark window, body almost level, abdomen short. Wings beat in stylized sharply separated held poses: clear wing shapes rather than smooth or blurred spinning. The camera rises smoothly to keep it centered. Gold flecks arc down, quiet blue rim. End on the same recognizable compact mechanical creature alive in the air. Maintain detailed hand-painted texture through motion, graphic film lighting, selective edges, layered painted focus.\nSynchronized cinematic sound: soft nighttime room tone, close small mechanical hinge ticks, delicate glass resonance swelling inside the crystal, one sharp wing snap and airy metal takeoff, soft flutter clicks and spark decay. No speech, no singing, no music. No cuts, titles, logos, or transitions.",
      "review": [
        "Compact crystal and shorter body improve design consistency; wing blur persists; native energy shapes are coarse."
      ]
    },
    {
      "cut": "03",
      "label": "Final cut",
      "media_url": "/assets/spark-v3.mp4",
      "contact_sheet_url": "/assets/contact-sheet-v3.jpg",
      "cost_usd": 0,
      "source_cut": "02",
      "width": 1920,
      "height": 1080,
      "duration_seconds": 15.0,
      "fps": 24,
      "original_effects_fps": 12,
      "audio": "Loudness-normalized stereo AAC 48 kHz",
      "sha256": "089097ebdc96321b1c3a9726f4e16ab5ac2e9c4b157cfca5d02b66d14d4b7ff8",
      "review": [
        "Cut 02 keeps the cyan crystal compact through the sampled sequence and shortens the wasp-like abdomen seen in Cut 01. The workshop retains broad painted marks, warm brass edges, and rich indigo shadows.",
        "The final composite adds original irregular vector spark silhouettes and falling flecks at launch. These accents use 12 drawings per second, each held for two frames over the 24 fps base. The camera remains the original continuous generated motion.",
        "The soundtrack was normalized for more audible playback. It remains stereo for the full shot; decoded signal peaks at 0.842 with no clipped samples. This verifies the track and signal level, not a subjective listening assessment.",
        "Remaining differences: wing motion is still smooth and blurred rather than fully posed on twos; native cyan energy shapes are broad and coarse; some hinge reflections look physical; the six legs and four wings are not equally readable in every pose. Added 2D accents do not correct those generated-motion limitations.",
        "This is an original Arcane-inspired visual experiment, with both source cuts preserved. It does not achieve an indistinguishable Fortiche result or supply an editable 3D scene."
      ]
    }
  ],
  "selected_cut": "03",
  "review": [
    "Cut 02 keeps the cyan crystal compact through the sampled sequence and shortens the wasp-like abdomen seen in Cut 01. The workshop retains broad painted marks, warm brass edges, and rich indigo shadows.",
    "The final composite adds original irregular vector spark silhouettes and falling flecks at launch. These accents use 12 drawings per second, each held for two frames over the 24 fps base. The camera remains the original continuous generated motion.",
    "The soundtrack was normalized for more audible playback. It remains stereo for the full shot; decoded signal peaks at 0.842 with no clipped samples. This verifies the track and signal level, not a subjective listening assessment.",
    "Remaining differences: wing motion is still smooth and blurred rather than fully posed on twos; native cyan energy shapes are broad and coarse; some hinge reflections look physical; the six legs and four wings are not equally readable in every pose. Added 2D accents do not correct those generated-motion limitations.",
    "This is an original Arcane-inspired visual experiment, with both source cuts preserved. It does not achieve an indistinguishable Fortiche result or supply an editable 3D scene."
  ],
  "total_video_generation_cost_usd": 5.04,
  "effects_source": "production/composite.py"
}