{
  "id": "reserved-paper-lost-edges",
  "status": "rendered_partial_success",
  "checkedAt": "2026-09-07",
  "purpose": "紙を塗り切らず、部分的に白へ消える境界を作る",
  "sources": [
    {
      "url": "https://www.learningtopaint.co.uk/blog/ask-ali-26-april-2024",
      "claim": "背景が紙の白へ溶け込むvignetteと、水による柔らかい境界"
    },
    {
      "url": "https://www.louisedemasi.com/tips/2023/11/23/how-to-paint-lost-and-found-edges-in-watercolour",
      "claim": "明確な輪郭と失われる輪郭を使い分ける"
    },
    {
      "url": "https://en.canson.com/expert-advice/watercolor-leaving-white-spaces",
      "claim": "紙の白を塗り残すリザーブ"
    }
  ],
  "requires": [
    "新しい候補で下塗りから計画",
    "筆幅を含めた未接触領域",
    "brush / wait"
  ],
  "recipe": [
    "下塗りの筆を紙端より手前で止める",
    "終点と余白を非対称にする",
    "筆圧を段階的に下げる",
    "別試験で境界に先行水を置く",
    "主役には読みやすい輪郭を残す"
  ],
  "failureSigns": [
    "均一な白枠",
    "切り抜きに見える境界",
    "反射の不自然な途切れ",
    "周辺の細線が余白に浮く",
    "横筆の塗り終わりが滑らかな帯になり、角が丸く整いすぎる"
  ],
  "limitations": [
    "pressureは接触幅を変えるが透明な消失の保証ではない",
    "濡れた領域は不透過マスクではない",
    "liftで完全な白紙には戻せない"
  ],
  "visualValidation": {
    "experiment": "/sketch/experiments/reserved-paper-v7/",
    "result": "紙の余白は作れた。揃った下端と丸い右下が残り、lost edgeは未達。",
    "preferredResearchCandidate": "full-strong",
    "adoptedAsFinishedArtwork": false
  },
  "noviceAgentTransfer": "not_tested"
}