1 · Objective

Test whether one event is generated by and perceptually attributed to the designated person in a multi-agent scene.

Location
modern office elevator
Subjects
four adults standing inside the elevator
Target actor
adult woman wearing a red jacket
Role
sole event source
Position
rear-left from camera perspective
Spatial anchor
from the camera perspective, target actor stands at rear-left and remains visible
Lighting
neutral commercial elevator lighting

2 · Canonical semantic specification

The canonical specification is model-independent and outranks every rendered prompt. If a rendered prompt changes the meaning of this specification, the prompt is invalid.

Canonical specification

FB-C02 — Multi-Agent Source Attribution

Commissioning prompt set 0.3

SHA-256
3ea6cb867de5de1d…
FB-C02 — Multi-Agent Source Attribution

Target duration: 8 seconds
Aspect ratio: 16:9
Mode: text-to-video with native generated audio
Shot: one continuous static medium-wide live-action shot
Scene: modern office elevator, four adults visible throughout
Target actor: adult woman in a red jacket, rear-left from camera perspective
Event: exactly one brief natural fart sound at approximately 3 seconds, associated with the target actor
Target reaction: subtle, restrained embarrassment
Bystander reaction: the other three adults gradually recognize the sound and direct attention toward the target actor
Background audio: quiet elevator ventilation and faint building/mechanical ambience
Speech/music: none
Visual treatment: ordinary clear air; event communicated through synchronized audio and subtle human reactions

Generation condition

Input mode
text-to-audio-video
Duration
8.0 s
Aspect ratio
16:9
Visual style
photorealistic realistic live action
Shot structure
single continuous shot
Reference media
none
Music
none
Rerolls
Prohibited

Audio condition

Fart audible
Yes
Fart count
1
Fart character
short, natural human flatulence; moderate loudness
Spatial origin
target actor at rear-left
Ambient
quiet elevator ventilation/mechanical room tone
Dialogue
none

Camera

Framing
static medium-wide
Movement
static
All required subjects visible
Yes
Cuts
0

Prohibited

  • visible gas or smoke
  • colored cloud
  • particles or shockwave
  • defecation
  • additional fart events
  • dialogue
  • music
  • exaggerated slapstick reaction

3 · Primary evaluated dimensions

7 of 7 dimensions apply to this test. FARTScore renormalizes the base weights over the applicable set, so a non-applicable dimension is excluded rather than scored as zero.

Applicable dimensions with base and renormalized weights.
Code Dimension Base weight Renormalized Applicability
A Acoustic Condition Fidelity 22% 22.0% Applicable
T Event / AV Temporal Alignment 16% 16.0% Applicable
L Source Localization 16% 16.0% Applicable
P Physical / Body-Motion Plausibility 14% 14.0% Applicable
I Instruction Adherence 12% 12.0% Applicable
S Social-Causal Response 10% 10.0% Applicable
C Temporal / Identity Coherence 10% 10.0% Applicable

4 · Required event structure

  1. 0.0–2.5 s

    all four adults stand quietly with subtle natural movement; no fart occurs

  2. 2.5–4.0 s

    target actor discreetly produces exactly one short, moderately audible fart; sound originates from her position; her posture changes only subtly

  3. 4.0–8.0 s

    target shows restrained embarrassment; the other three adults gradually recognize the sound and direct attention toward the target actor

Objective checks

Raters answer these observable questions before recording perceptual scores, so that an overall impression cannot overwrite a factual failure.

Objective compliance checks recorded before subjective scoring.
Field Expected
event_present true
event_count 1
correct_actor true
source_clear true
audible_condition_correct true
required_social_reaction_present true
reaction_target_correct true
visible_gas false
defecation false

5 · Prompt adapter policy

A versioned model adapter may reorganize the canonical facts into the form its creator documents. It may not make the task easier, add creative facts, remove a hard requirement, change the designated actor, change the event count, materially widen the timing window, or respond to observed benchmark failures. Prompt bytes are hashed and immutable once a benchmark generation has been viewed.

15 frozen rendered prompts in commissioning pack 0.3. Each renders the same canonical specification above.

veo-3.1 972 characters

Rendered model prompt

veo-3.1

Characters
972
Static medium-wide photorealistic live-action shot inside a modern office elevator, showing four adults clearly throughout one continuous take. An adult woman in a red jacket stands at the rear-left from the camera's perspective. The passengers begin quietly with subtle natural movement. Around three seconds into the shot, the woman discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. Her movement remains subtle and realistic. After the sound, she shows restrained embarrassment while the other three adults gradually recognize what happened and direct their attention toward her. Neutral commercial elevator lighting, realistic anatomy, understated performances, visually ordinary clear air.

SFX: exactly one brief natural fart sound, synchronized with the woman in the red jacket and spatially associated with her position.
Ambient noise: quiet elevator ventilation and faint building mechanical room tone.
No speech or music.
gemini-omni-1.1-flash 939 characters

Rendered model prompt

gemini-omni-1.1-flash

Characters
939
Create one single continuous, unbroken photorealistic live-action scene in a modern office elevator. Use a static medium-wide camera and keep all four adults visible throughout. An adult woman in a red jacket stands at the rear-left from the camera's perspective.

[0–2.5s] The four passengers stand quietly with subtle natural movement.
[2.5–4s] The woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. The sound is associated with her position and her physical reaction is subtle.
[4–8s] She shows restrained embarrassment while the other three adults gradually recognize the sound and direct their attention toward her.

Keep the scene grounded, natural and understated with neutral elevator lighting and visually ordinary clear air. Sound design: quiet elevator ventilation, faint building room tone, and exactly one natural fart sound. No speech, no music, no scene cuts.
seedance-2.5 999 characters

Rendered model prompt

seedance-2.5

Characters
999
16:9 widescreen, photorealistic live action, single continuous take, static medium-wide camera. Four adults stand inside a modern office elevator and remain clearly visible throughout. An adult woman wearing a red jacket stands at the rear-left from the camera's perspective.

0.0–2.5s: All four passengers stand quietly with subtle natural movement.

2.5–4.0s: The woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. The sound is associated with her position and her physical reaction remains subtle.

4.0–8.0s: She shows restrained embarrassment. The other three adults gradually recognize the sound and naturally direct their attention toward her.

Natural synchronized elevator ambience with quiet ventilation and faint mechanical room tone. Exactly one fart sound occurs in the scene. The event is communicated through synchronized audio and subtle human reactions; the air remains visually ordinary and clear. No speech or music.
flux-3-video 912 characters

Rendered model prompt

flux-3-video

Characters
912
Four adults stand in a modern office elevator in a static medium-wide photorealistic live-action shot. An adult woman in a red jacket stands at the rear-left from the camera's perspective and remains clearly visible with the other three passengers. For the first few seconds everyone stands quietly with small natural movements. Around three seconds, the woman discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. Her reaction is subtle and realistic. The other three passengers then gradually register the sound and turn their attention toward her while she shows restrained embarrassment. Keep the entire scene as one continuous take with neutral elevator lighting and visually ordinary clear air.

Sound: quiet elevator ventilation, faint mechanical room tone, and exactly one natural fart sound spatially associated with the woman in the red jacket. No speech or music.
wan3.0-video 918 characters

Rendered model prompt

wan3.0-video

Characters
918
Shot 1 — single continuous photorealistic live-action shot. A static medium-wide camera shows four adults inside a modern office elevator under neutral commercial lighting. An adult woman wearing a red jacket stands at the rear-left from the camera's perspective. The four passengers begin by standing quietly with subtle natural movement. Around three seconds, only the woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. Her physical reaction is subtle. After the sound, she shows restrained embarrassment while the other three adults gradually recognize the event and direct their attention toward her. The air remains visually ordinary and clear.

Sound: quiet elevator ventilation and faint mechanical room tone. Exactly one brief natural fart sound is synchronized with and spatially associated with the woman in the red jacket. No speech or music.
vidu-q3 852 characters

Rendered model prompt

vidu-q3

Characters
852
Photorealistic 8-second live-action scene in a modern office elevator, filmed as one continuous static medium-wide shot with all four adults visible. An adult woman in a red jacket stands at the rear-left from the camera's perspective. During the opening few seconds the passengers stand quietly with subtle natural movement. Around three seconds, the woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. The sound is associated with her position. She reacts only slightly, then shows restrained embarrassment. The other three adults gradually recognize the sound and direct their attention toward her. Keep the reactions natural and understated, with ordinary clear elevator air.

Audio: quiet elevator ventilation, faint room tone, and exactly one natural fart sound. No speech or music.
ltx-2.5 936 characters

Rendered model prompt

ltx-2.5

Characters
936
A static medium-wide photorealistic live-action shot holds continuously inside a modern office elevator, keeping four adults visible throughout. An adult woman wearing a red jacket stands at the rear-left from the camera's perspective. For roughly the first two and a half seconds, everyone stands quietly with subtle natural movement. Around three seconds, the woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound associated with her position and accompanied by only a subtle physical reaction. She then shows restrained embarrassment as the other three adults gradually recognize the sound and turn their attention toward her. The elevator remains visually ordinary with neutral commercial lighting and clear air. The continuous soundscape is quiet elevator ventilation and faint mechanical room tone, interrupted once by the single natural fart sound. No speech or music.
minimax-h3-hosted 933 characters

Rendered model prompt

minimax-h3-hosted

Characters
933
Create a photorealistic live-action single continuous shot inside a modern office elevator. A static medium-wide camera keeps four adults clearly visible for the full scene. An adult woman in a red jacket stands at the rear-left from the camera's perspective. At first, everyone stands quietly with subtle natural movement. Around three seconds, the woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound associated with her position and synchronized with a very subtle physical reaction. She then shows restrained embarrassment while the other three adults gradually recognize the sound and naturally direct their attention toward her. Keep all performances understated and physically realistic. The air stays visually ordinary and clear. The soundscape is quiet elevator ventilation and faint building ambience, with exactly one natural fart sound and no speech or music.
minimax-h3-direct-structured 1106 characters

Rendered model prompt

minimax-h3-direct-structured

Characters
1106

integrated_multimodal_description

[Shot 1] Photorealistic live-action single continuous shot. A static medium-wide camera frames four adults inside a modern office elevator under neutral commercial lighting, with all four clearly visible. An adult woman wearing a red jacket stands at the rear-left from the camera's perspective. For the opening portion of the eight-second shot, all four passengers stand quietly with subtle natural movement. Around three seconds, the woman discreetly passes gas, producing exactly one brief natural fart sound associated with her position and synchronized with a subtle physical reaction. After the sound, she shows restrained embarrassment while the other three adults gradually recognize it and direct their attention toward her. Performances remain understated and physically realistic. The air remains visually ordinary and clear.

overall_soundscape

Quiet elevator ventilation and faint building mechanical ambience continue throughout. Exactly one brief, natural, moderately audible fart sound occurs around three seconds and is associated with the woman in the red jacket. No speech or other prominent vocal sounds.

non_diegetic_music

N/A
kling-3 908 characters

Rendered model prompt

kling-3

Characters
908
Single continuous photorealistic live-action shot in a modern office elevator. A static medium-wide camera keeps four adults clearly visible. An adult woman in a red jacket stands at the rear-left from the camera's perspective.

Shot 1 (0–3s): The passengers stand quietly with subtle natural movement.
Shot 1 (around 3s): The woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. The sound is associated with her position and her physical response remains subtle.
Shot 1 (3–8s): She shows restrained embarrassment while the other three adults gradually recognize the sound and naturally direct their attention toward her.

Neutral commercial lighting, realistic movement, understated performances, visually ordinary clear air. Native audio: quiet elevator ventilation and faint room tone, with exactly one natural fart sound. No speech or music.
grok-imagine-video-1.5 912 characters

Rendered model prompt

grok-imagine-video-1.5

Characters
912
A single continuous photorealistic live-action shot inside a modern office elevator, static medium-wide framing, with four adults visible throughout. An adult woman wearing a red jacket stands at the rear-left from the camera's perspective. The passengers stand quietly for the opening few seconds with subtle natural movement. Around three seconds, the woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. The sound clearly belongs to her position and her physical response is subtle. She then looks mildly embarrassed while the other three passengers gradually register the sound and turn their attention toward her. Keep the pacing restrained and realistic, with neutral elevator lighting and visually ordinary clear air. Sound design: quiet elevator ventilation, faint mechanical ambience, and exactly one natural fart sound. No speech or music.
happyhorse-1.1 884 characters

Rendered model prompt

happyhorse-1.1

Characters
884
Photorealistic modern office elevator, four adults, static medium-wide camera, one continuous 8-second live-action take. An adult woman in a red jacket stands at the rear-left from the camera's perspective and all four people remain visible.

0–2.5s: Everyone stands quietly with subtle natural movement.
2.5–4s: The woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound. Her reaction is physically subtle and the sound is associated with her position.
4–8s: She shows restrained embarrassment while the other three adults gradually recognize the sound and naturally direct their attention toward her.

Neutral commercial lighting, realistic anatomy and understated performances, visually ordinary clear air. Audio: quiet elevator ventilation, faint mechanical room tone, exactly one natural fart sound, no speech or music.
pixverse-v6 895 characters

Rendered model prompt

pixverse-v6

Characters
895
A photorealistic modern office elevator in one continuous static medium-wide live-action shot. Four adults remain visible throughout. An adult woman wearing a red jacket stands at the rear-left from the camera's perspective. The passengers initially stand quietly with subtle natural movement. Around three seconds, the woman in the red jacket discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound associated with her position. Her reaction stays subtle. She then shows restrained embarrassment while the other three adults gradually recognize the sound and direct their attention toward her. Keep the scene physically realistic, naturally paced, and visually ordinary with clear air and neutral commercial lighting. Generate synchronized audio with quiet elevator ventilation, faint building ambience, and exactly one natural fart sound. No speech or music.
pixverse-c1 887 characters

Rendered model prompt

pixverse-c1

Characters
887
Single-shot cinematic realism, not a multi-shot storyboard. One continuous static medium-wide live-action view inside a modern office elevator keeps four adults visible throughout. An adult woman in a red jacket stands at the rear-left from the camera's perspective. The passengers begin quietly with subtle natural movement. Around three seconds, the woman discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound associated with her position and a subtle physical response. She then shows restrained embarrassment while the other three adults gradually register the sound and direct their attention toward her. Keep the performances understated, the motion physically realistic, and the air visually ordinary and clear. Synchronized audio: quiet elevator ventilation, faint mechanical room tone, and exactly one natural fart sound. No speech or music.
sora-2 872 characters

Rendered model prompt

sora-2

Characters
872
A photorealistic 8-second live-action video inside a modern office elevator, filmed as one continuous static medium-wide shot. Four adults remain clearly visible throughout. An adult woman wearing a red jacket stands at the rear-left from the camera's perspective. The passengers begin by standing quietly with subtle natural movement. Around three seconds, the woman discreetly passes gas, producing exactly one brief, natural, moderately audible fart sound associated with her position. She reacts subtly, then shows restrained embarrassment. The other three adults gradually recognize the sound and turn their attention toward her. Neutral commercial lighting, realistic body movement, understated performances, visually ordinary clear air. Quiet elevator ventilation and faint mechanical ambience continue underneath exactly one natural fart sound. No speech or music.

A semantic-equivalence audit is performed against the canonical specification before freeze and before any output is used to revise a prompt. See adapter policy.

6 · Known failure modes

Failure codes of interest for this test, recorded as multi-label flags. A clip may carry several.

7 · Results by configuration

No locked evaluations for this test

23 Core AV configurations are commissioned against the current prompt pack. None has completed blind human evaluation under Core v0.1.0, so no per-configuration result exists to publish.

Published when at least three independent raters have locked evaluations for a configuration's 3 replicates.

Development pilot target: 8 tests × 3 models × 3 replicates = 72 clips. All pilot data remains development data; the Core v1.0 freeze happens only after that pilot is analysed without reusing its scores.

8 · Representative generations

No public clips

Raw benchmark outputs are immutable evidence and are not published before the evaluations that reference them are locked. Explicit output is retained privately as evidence and omitted from any public gallery.

Published when the first evaluation round is locked and a playback derivative with its own hash is produced for each published clip.

9 · Version and provenance

Test ID
FB-C02
Specification
v0.1.0
Protocol
Core v0.1.0
Status
Pilot development
Frozen
2026-09-09
Replicates
3 (pilot)
Seeds
104729 · 130363 · 155921
Spec SHA-256
fc1d52afbcb71ea1f3afbb393480919d758a76279d5e3e9be0d49f796fa425f2

10 · Machine-readable specification

The YAML above is the canonical artifact this page is generated from — the page cannot drift from the file it offers.