{
  "schema_version": 1,
  "run_id": "run-20261015-rainbow-budgie-v12",
  "title": "アニメ調に戻した、首の柔らかな羽",
  "species": "レインボー・セキセイインコ（試作）",
  "model_id": "rainbow-budgie-stylized-neck-v12",
  "action_id": "upright-preen-body-follow",
  "animation_id": "Animation",
  "category": "羽づくろい",
  "created_at": "2026-10-15T09:32:16.338940+00:00",
  "created_at_precision": "exact",
  "parent_run_id": "run-20261015-rainbow-budgie-v11",
  "source_commit": "d70229262464fb63dd85198a662c6949247a639f",
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  "blender_version": "4.3.2",
  "parameter_diff": {
    "rollback": "Restore v8-inspired smooth anime body, face, eyes, folded wings and tail; remove v11 full-body tufts",
    "neck_core": "Preserve slender core at 0.48 radial scale",
    "neck_cover": "Independent overlapping thin triangular feather bases; no connected stretchy undercoat shell",
    "movement": "Original rig animation unchanged; short tip compression and settling retained",
    "limits": "Linear blend skinning still introduces measured residual strain; no inextensible solver claim"
  },
  "quality": "人間評価待ち",
  "adoption": "公開試作",
  "evaluation": {
    "summary": "全身の毛束を取りやめ、滑らかなアニメ調へ。首だけに薄く重なる羽を残した試作。",
    "naturalness": "人間評価待ち",
    "unresolved": [
      "羽同士の衝突処理は未実装",
      "首の質感と境界は人間評価待ち",
      "実機モバイル描画速度は未確認",
      "首の下端に襟状の境界が残る",
      "各薄片内の伸縮は測定値を参照。厳密な非伸縮の羽ソルバーではない",
      "薄片内の辺長は最大約45%圧縮。厳密な長さ固定は今回未達"
    ],
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      "rest_head_foreaft_mm": -29.66454066336155,
      "body_rest_pitch_adjustment_deg": -55,
      "body_follow_peak_deg": 3.0,
      "max_glb_surface_error_mm": 0.005900936685065972,
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          "max_surface_error_m": 3.1564425171382027e-06
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          "max_surface_error_m": 5.726732524635736e-06
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          "max_surface_error_m": 5.617522219836246e-06
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          "max_surface_error_m": 4.895334768661996e-06
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          "max_surface_error_m": 3.1947849947755458e-06
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          "max_surface_error_m": 3.1631898309569806e-06
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          "max_surface_error_m": 3.163044766552048e-06
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          "max_surface_error_m": 3.490282779239351e-06
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          "max_surface_error_m": 3.2546681723033544e-06
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          "frame": 110,
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          "max_surface_error_m": 3.1609763482265407e-06
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        {
          "frame": 140,
          "max_surface_error_m": 3.1564425171382027e-06
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      ],
      "style_assessment": "Toward simplified matte animation style; not human-approved",
      "references": [
        "https://academy.allaboutbirds.org/feathers-article/"
      ],
      "reference_note": "Contour feathers: concealed fluffy bases and shallow overlapping visible tips. Reference photos inspected, not copied or republished.",
      "limitations": [
        "Feet are tracked by weighted vertices, not a full dynamic contact solver",
        "Wings remain folded shells bound to torso, not articulated flight wings",
        "Naturalness, head shape and cartoon appeal require human assessment"
      ],
      "trials": 3,
      "max_eye_surface_distance_mm": 0.05501996201928705,
      "min_toe_pad_perch_gap_mm": -0.17940049683876252,
      "motion_fcurves_identical_to_parent": true,
      "motion_unchanged_outside_window": null,
      "motion_fcurves_sha256": "20e0de90d14848d0dab294e2e32e00154f235e66e17cee8824cf226504852def",
      "toe_count_per_foot": 4,
      "toe_arrangement": "2 forward + 2 backward",
      "limits": "Perch contact tolerance permits 0.3 mm shallow intersection; this is a visual/support check, not a physical solver.",
      "experiment_status": "prototype_human_review_pending",
      "root_attachment_passed": true,
      "root_attachment_guard_mm": 0.2,
      "feather_roots_fixed_in_morphs": true,
      "max_feather_root_distance_mm": 0,
      "max_tip_morph_displacement_mm": 0.11032158673368483,
      "core_width_at_z68mm": 13.305421452969313,
      "masked_feather_materials": 1,
      "merged_bone_and_morph_animation": true,
      "visual_assessment": "全身の毛束を取りやめ、滑らかなアニメ調へ。首だけに薄く重なる羽を残した試作。",
      "root_attachment_frames_checked": 141,
      "neck_piece_length_measurements": {
        "Flexible neck feathers": {
          "min_edge_length_ratio": 0.5578133256200788,
          "max_edge_length_ratio": 1.0797147603137613,
          "sampled_edges": 4000,
          "frames": 141
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        "Soft feather undercoat": {
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          "max_edge_length_ratio": 1.040475761595412,
          "sampled_edges": 4081,
          "frames": 141
        }
      },
      "neck_piece_length_note": "Shared weights within each piece remove cross-piece stretching; linear-blend skinning still causes the measured residual strain. Not a physically inextensible feather solver."
    }
  },
  "license": {
    "id": "shrike",
    "page_url": "https://opengameart.org/content/bird-yellow-billed-shrike",
    "author": "pistachio",
    "acquired_date_utc": "2026-10-13",
    "license": "CC0 1.0",
    "license_verified": true,
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    "license_evidence": "evidence/bird-yellow-billed-shrike.html",
    "download_url": "https://opengameart.org/sites/default/files/bird_yellow_billed_shrike.zip",
    "source_path": "assets/birds/shrike/bird_yellow_billed_shrike.zip",
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