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video-workbench/projects/2026-06-23-在路上/slides/s21/s21-v3-brief.md

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S-21 Slide Brief V3

Status

  • Slide: s21
  • Source shot: S-21: 那一簇火，指引方向
  • Version: s21-v3
  • Written by: session-03 child session
  • Worker profile: video-slide-production
  • Running mode: prompt and generate
  • Review: disabled
  • Overwrite allowed: no

Source Basis

  • projects/2026-06-23-在路上/intake/阶段五-人物一致性单镜.md
  • projects/2026-06-23-在路上/visual-system/visual-system.md
  • projects/2026-06-23-在路上/visual-system/style/style-prompt-master.md
  • projects/2026-06-23-在路上/visual-system/characters/character-reference-registry.md
  • projects/2026-06-23-在路上/slides/broad-generation-self-audit-v1.md
  • investigations/2026-06-24-s14-reference-capable-generation/reviews/summary-and-rule-implications.md

Slide Function

Validate side/back dynamic character consistency for the traveler while introducing the first fire as a direction signal.

The fire does not let him stop. It confirms that he can continue walking.

First Read

Night road and muddy roadside first, then a small restrained fire, then the traveler at the edge of the firelight adjusting the old backpack and continuing forward.

Risk Class

medium human / side-back dynamic consistency

Risk reason:

  • The traveler is visible enough for coat, backpack, stride, boots, and side/back posture to matter.
  • Text-only identity prompting is not sufficient.
  • The prior broad-run s21-v1-image.png lacked prompt/reference trace and had posture risk.

Reference Plan

Style:

  • Style module: D | 夜路小火
  • Active style reference: projects/2026-06-23-在路上/intake/imgs/D.夜路篝火型蓝图.png
  • Role: restrained night-road fire style, small fire signal, mood/palette guardrail

Character:

  • Primary character reference: projects/2026-06-23-在路上/visual-system/characters/character-anchor-v2-walk-side-reference-crop-tight.png
  • Role: Image 1: identity reference for side/back walking traveler adjusting backpack
  • Supporting character reference if the slide-agent can load a second visible image: projects/2026-06-23-在路上/visual-system/characters/character-slice-walk-side-v2-from-anchor.png
  • Supporting role: walking side silhouette, coat length, backpack placement, stride, and boots

The actual character reference image must be loaded into visible generation context before host image generation. A local file path in the prompt is traceability only and does not count as loading the image.

Visual Requirements

  • 16:9 horizontal cinematic documentary road-film still.
  • Deep blue-gray night or post-dusk roadside.
  • Small real fire near the roadside, preferably to one side or lower part of the frame.
  • Muddy road continues beyond the fire.
  • Firelight touches mud, boots, backpack edge, or coat edge, but does not flood the whole frame.
  • Traveler is side/back to camera, not front-facing, not looking at the viewer.
  • Traveler is adjusting the old backpack naturally, as if preparing to continue.
  • Person scale: about 1/6 to 1/4 of frame.
  • Fire scale: small directional signal, not large campfire.

Character Handling

Keep these from the active character system:

  • middle-aged road-worn male traveler around 50;
  • dark slightly messy hair where visible;
  • dark gray / dark khaki / coal-black long coat;
  • old practical backpack;
  • worn boots;
  • tired but capable body posture.

Do not replace the active image reference with a text-only character description. If the reference image cannot be made visible to generation context, block generation and write the reason in the return.

Composition / Scale

  • Environment first, road second, fire third, traveler fourth.
  • The traveler may be on the edge of the firelight, not centered as a portrait.
  • The action should orient toward the road, not toward staying by the fire.
  • Leave dark road/depth ahead of the traveler.

Light / Color / Texture

  • Base: cold wet blue-gray, dark khaki, coal black, earth brown.
  • Emotional accent: restrained warm orange firelight.
  • Texture: real mud, wet road, rough stones, worn fabric, backpack straps.
  • Keep dark depth in the background.

Forbidden Drift

  • No camping advertisement.
  • No tent, chairs, cookware, picnic setup, cozy campsite, group gathering, reunion, or victory.
  • No large theatrical bonfire.
  • No portrait MV, hero pose, fashion travel photography, or motivational poster.
  • No text, labels, logos, watermarks, UI, or sci-fi/neon drift.
  • No text-only identity generation for the visible traveler.

Acceptance Checklist

  • The traveler can plausibly be the same person as the active character references.
  • Side/back posture, old backpack, long coat, stride, and boots remain stable.
  • The adjustment of the backpack looks natural rather than posed.
  • The fire is small and directional, not a destination.
  • The image reads as "continue forward" rather than "rest at camp."
  • The prompt records gpt-image-2 Advisor use and the visible-context image role.
  • No s21-v3-review.md is written.

Prompt Handoff

Agent S-21 must read this brief and write only:

  • projects/2026-06-23-在路上/slides/s21/s21-v3-prompt.md
  • projects/2026-06-23-在路上/slides/s21/s21-v3-image.png
  • projects/2026-06-23-在路上/tasks/2026-06-24-character-consistency/session-03/returns/s21-v3-slide-agent-return.md

The prompt must use the gpt-image-2 Skill Advisor / host-native workflow, assign the loaded character reference as Image 1, use style module D | 夜路小火, and suppress review.