{
  "taskId": "expansion-051",
  "slug": "mirror-single-subject-reflection-check",
  "language": "en",
  "mode": "image-to-video",
  "modelId": "MiniMax-H3",
  "evidenceClass": "original-practice-method-not-model-tested",
  "input": {
    "path": "/learning-assets/pseo-expansion70-20261014/mirror-single-subject-reflection-check/first-frame.png",
    "editableSource": "/learning-assets/pseo-expansion70-20261014/mirror-single-subject-reflection-check/first-frame.svg",
    "role": "first_frame",
    "sourceType": "original-illustration"
  },
  "intent": {
    "cluster": "Historical reference input and image-to-video prompt family",
    "historicalQueries": [
      "minimax h3 image to video",
      "minimax h3 reference images",
      "minimax h3提示词模板"
    ],
    "evidenceRef": "docs/research/pseo-keyword-gap-2026-10-05/evidence/bing-live-keywords.csv",
    "distinctValue": "One visible bottle and its mirror reflection move together during a short tabletop slide; the mirror frame, clipping boundary and matched stop time are inspectable.",
    "existingOwnerBoundary": [
      {
        "path": "/blog/product-shape-consistency-video",
        "difference": "This supplied mirror scene separates the physical product from its reflected image and checks the glass boundary, rather than providing broad shape-preservation advice."
      },
      {
        "path": "/blog/image-to-video-motion-prompts",
        "difference": "The specific task includes linked subject/reflection timing and mirror clipping checks absent from a general first-frame motion guide."
      }
    ],
    "demandClass": "historical-parent-query; exact long-tail demand unmeasured"
  },
  "title": "One subject in a mirror: check the reflection and the glass boundary",
  "description": "Slide one bottle a short distance in front of a fixed mirror. Inspect paired motion, one reflected image and the mirror boundary without adding another physical bottle.",
  "goal": "Request a short bottle slide with a corresponding mirror reflection and matched ending. The original illustration is a visual planning input; this method has not been tested on H3 and does not certify geometrically exact reflections.",
  "preparation": [
    "Use a source with one real object, one readable reflection and the whole mirror frame visible. The supplied bottle has a simple silhouette so subject count and neck proportions can be checked.",
    "Keep the object and reflected image visually separate. If they overlap heavily or the mirror edge is cropped, start with a clearer composition.",
    "Plan a short tabletop slide that keeps the reflection inside the mirror. Reflection geometry depends on the mirror plane and viewpoint; do not apply a blanket screen-left/screen-right inversion rule.",
    "For exact product reflectance or strict mirror geometry, use a controlled capture, compositing or a three-dimensional render. This task judges visible continuity and boundary behavior."
  ],
  "prompt": "Start from the uploaded scene with one physical bottle on the tabletop and its one reflection inside the framed mirror. The mirror, tabletop, camera and lighting stay fixed. The physical bottle slides slowly a short distance to the right while remaining upright and in contact with the table. Its corresponding reflected image moves coherently inside the mirror for the same action and stops when the bottle stops. Preserve the bottle silhouette, neck proportions and single cap in both views. Keep reflected content confined to the glass area without spilling across the frame or becoming an extra physical bottle. Finish with both views still. No camera move, no duplicate product, no changing mirror frame.",
  "steps": [
    {
      "title": "Separate object from reflected image",
      "body": "Count one physical bottle on the table and one image inside the mirror before running. Treat the reflected bottle as linked content, not a second actor with its own action."
    },
    {
      "title": "Set a short paired action",
      "body": "Write one rightward slide with an upright bottle and a simultaneous reflected response. Keep the mirror and camera fixed so their movement cannot explain a drifting reflection."
    },
    {
      "title": "Inspect the glass edges during motion",
      "body": "Check the reflection nearest the frame at mid-slide. It should stay confined to the glass; it must not paint over the frame, appear on the wall or continue as a physical bottle in front of the mirror."
    },
    {
      "title": "Compare the two stopping states",
      "body": "Sample just before motion, during the slide and the final hold. Check shared start/stop timing and coherent cap/neck shape. If exact reflected geometry is required, move to capture or compositing rather than labeling a plausible view as verified."
    }
  ],
  "acceptance": [
    "There is one physical bottle and one corresponding reflected image.",
    "The mirror frame remains fixed and keeps its original shape.",
    "The physical bottle slides once while upright and supported by the table.",
    "The reflected image responds during the same action and holds when the bottle holds.",
    "Bottle silhouette, neck proportions and cap count remain coherent in both views.",
    "Reflected content stays inside the glass and never paints over the frame.",
    "No extra physical bottle appears outside the mirror during the final hold."
  ],
  "troubleshooting": [
    {
      "symptom": "A second physical bottle appears",
      "change": "Change only the role assignment to one bottle and its image confined to the glass; keep the short slide."
    },
    {
      "symptom": "The reflection lags or keeps moving after the bottle",
      "change": "Change only the timing sentence to shared motion and stop; inspect the transition into the hold."
    },
    {
      "symptom": "The reflection crosses over the frame",
      "change": "Reduce only the slide distance to preserve more space within the glass, then recheck the boundary."
    },
    {
      "symptom": "The frame or camera moves to follow the bottle",
      "change": "Change only the fixed-role sentence to lock mirror frame and camera; keep bottle travel unchanged."
    }
  ],
  "ending": "End with the upright bottle and its reflected image both still, each in the correct region of the scene. Record continuity and clipping results separately from any unresolved geometric accuracy.",
  "assetCaption": "Original bottle-and-mirror illustration for linked-motion inspection. The reflection is an illustrated briefing example, not an H3 result or a measured optical reference."
}