diff --git a/AGENTS.md b/AGENTS.md
index 5f3d822..9755223 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -43,6 +43,7 @@ ShortVideoGenerator/
 ├── .agents/skills/AGENTS.md      → 15개 작업 스킬의 작성 경계
 ├── contracts/AGENTS.md           → 스키마의 구조·의미 구분
 ├── templates/AGENTS.md           → 빈 양식·검토 양식의 경계
+├── tools/blender/AGENTS.md        → Blender 원본 검사·렌더 실행 경계
 ├── references/                  → 사용자 그림체와 참고 분석
 └── examples/                    → 실제 실행과 구분한 연결 예제
 ```
diff --git a/CLAUDE.md b/CLAUDE.md
index 5f3d822..9755223 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -43,6 +43,7 @@ ShortVideoGenerator/
 ├── .agents/skills/AGENTS.md      → 15개 작업 스킬의 작성 경계
 ├── contracts/AGENTS.md           → 스키마의 구조·의미 구분
 ├── templates/AGENTS.md           → 빈 양식·검토 양식의 경계
+├── tools/blender/AGENTS.md        → Blender 원본 검사·렌더 실행 경계
 ├── references/                  → 사용자 그림체와 참고 분석
 └── examples/                    → 실제 실행과 구분한 연결 예제
 ```
diff --git a/projects/water-hydrogen-bond-surface-tension/history/pre-blender-project.json b/projects/water-hydrogen-bond-surface-tension/history/pre-blender-project.json
new file mode 100644
index 0000000..fe2e4a4
--- /dev/null
+++ b/projects/water-hydrogen-bond-surface-tension/history/pre-blender-project.json
@@ -0,0 +1,195 @@
+{
+  "schema_version": "1.0",
+  "project_id": "water-hydrogen-bond-surface-tension",
+  "brief": {
+    "topic": "물의 수소결합에 의한 표면장력에 대한 설명",
+    "language": "한국어"
+  },
+  "settings": {
+    "aspect_ratio": "9:16",
+    "max_duration_ms": 180000,
+    "max_cut_duration_ms": 5000,
+    "style_reference": "references/1.png",
+    "tts_engine": "Qwen3-TTS",
+    "conda_env": "qwen3-tts",
+    "image_model": "gpt-image-2.5-sunburst"
+  },
+  "stages": [
+    {
+      "stage_id": "01-topic",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/01-topic/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "02-research",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/02-research/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "03-script",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/03-script/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "04-title",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/04-title/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "05-tts-split",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/05-tts-split/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "06-tts",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/06-tts/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "07-cuts",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/07-cuts/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "08-scenes",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/08-scenes/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "09-entities",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/09-entities/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "10-references",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/10-references/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "11-images",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/11-images/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "12-motion",
+      "status": "complete",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/12-motion/r1/artifact.json",
+      "issues": []
+    },
+    {
+      "stage_id": "13-compose",
+      "status": "awaiting_review",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/13-compose/r1/artifact.json",
+      "issues": [
+        {
+          "code": "FINAL_PLAYBACK_REVIEW_REQUIRED",
+          "message": "실제 MP4/SRT 생성·기술 검사·화면 표본 확인 완료. 최종 영상의 정상 속도 전체 재생·청취 확인은 final 검토 대기.",
+          "blocking": true
+        }
+      ]
+    },
+    {
+      "stage_id": "14-review",
+      "status": "awaiting_review",
+      "revision": 1,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/14-review/r1/artifact.json",
+      "issues": [
+        {
+          "code": "FINAL_PLAYBACK_REVIEW_REQUIRED",
+          "message": "근거·미확인 영역을 기록한 검수 보고 준비. 전체 재생·청취 미확인으로 recommendation=incomplete; 사용자 final 검토 대기.",
+          "blocking": true
+        }
+      ]
+    }
+  ],
+  "reviews": [
+    {
+      "review_id": "topic",
+      "decision": "approved",
+      "artifact_refs": [
+        {
+          "stage_id": "01-topic",
+          "revision": 1
+        }
+      ],
+      "feedback": "추천안으로 진행합니다"
+    },
+    {
+      "review_id": "story",
+      "decision": "approved",
+      "artifact_refs": [
+        {
+          "stage_id": "02-research",
+          "revision": 1
+        },
+        {
+          "stage_id": "03-script",
+          "revision": 1
+        },
+        {
+          "stage_id": "04-title",
+          "revision": 1
+        }
+      ],
+      "feedback": "확정합니다."
+    },
+    {
+      "review_id": "scenes",
+      "decision": "approved",
+      "artifact_refs": [
+        {
+          "stage_id": "07-cuts",
+          "revision": 1
+        },
+        {
+          "stage_id": "08-scenes",
+          "revision": 1
+        },
+        {
+          "stage_id": "09-entities",
+          "revision": 1
+        }
+      ],
+      "feedback": "승인합니다."
+    },
+    {
+      "review_id": "final",
+      "decision": "pending",
+      "artifact_refs": [
+        {
+          "stage_id": "13-compose",
+          "revision": 1
+        },
+        {
+          "stage_id": "14-review",
+          "revision": 1
+        }
+      ],
+      "feedback": ""
+    }
+  ]
+}
diff --git a/projects/water-hydrogen-bond-surface-tension/project.json b/projects/water-hydrogen-bond-surface-tension/project.json
index fe2e4a4..f1df07f 100644
--- a/projects/water-hydrogen-bond-surface-tension/project.json
+++ b/projects/water-hydrogen-bond-surface-tension/project.json
@@ -1,5 +1,5 @@
 {
-  "schema_version": "1.0",
+  "schema_version": "1.1",
   "project_id": "water-hydrogen-bond-surface-tension",
   "brief": {
     "topic": "물의 수소결합에 의한 표면장력에 대한 설명",
@@ -12,7 +12,7 @@
     "style_reference": "references/1.png",
     "tts_engine": "Qwen3-TTS",
     "conda_env": "qwen3-tts",
-    "image_model": "gpt-image-2.5-sunburst"
+    "visual_engine": "Blender"
   },
   "stages": [
     {
@@ -66,61 +66,91 @@
     },
     {
       "stage_id": "08-scenes",
-      "status": "complete",
-      "revision": 1,
-      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/08-scenes/r1/artifact.json",
-      "issues": []
+      "status": "draft",
+      "revision": 2,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/08-scenes/r2/artifact.json",
+      "issues": [
+        {
+          "code": "BLENDER_PREVIEW_IN_PROGRESS",
+          "message": "새 3D 장면 설계와 제한된 대표 렌더를 준비하고 있습니다.",
+          "blocking": true
+        }
+      ]
     },
     {
       "stage_id": "09-entities",
-      "status": "complete",
-      "revision": 1,
-      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/09-entities/r1/artifact.json",
-      "issues": []
+      "status": "draft",
+      "revision": 2,
+      "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/09-entities/r2/artifact.json",
+      "issues": [
+        {
+          "code": "BLENDER_PREVIEW_IN_PROGRESS",
+          "message": "새 3D 장면 설계와 제한된 대표 렌더를 준비하고 있습니다.",
+          "blocking": true
+        }
+      ]
     },
     {
       "stage_id": "10-references",
-      "status": "complete",
+      "status": "stale",
       "revision": 1,
       "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/10-references/r1/artifact.json",
-      "issues": []
+      "issues": [
+        {
+          "code": "VISUAL_ENGINE_CHANGED",
+          "message": "08·09의 Blender 3D 설계가 새 버전으로 바뀌어 기존 r1 결과는 이력으로 보존합니다.",
+          "blocking": true
+        }
+      ]
     },
     {
       "stage_id": "11-images",
-      "status": "complete",
+      "status": "stale",
       "revision": 1,
       "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/11-images/r1/artifact.json",
-      "issues": []
+      "issues": [
+        {
+          "code": "VISUAL_ENGINE_CHANGED",
+          "message": "08·09의 Blender 3D 설계가 새 버전으로 바뀌어 기존 r1 결과는 이력으로 보존합니다.",
+          "blocking": true
+        }
+      ]
     },
     {
       "stage_id": "12-motion",
-      "status": "complete",
+      "status": "stale",
       "revision": 1,
       "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/12-motion/r1/artifact.json",
-      "issues": []
+      "issues": [
+        {
+          "code": "VISUAL_ENGINE_CHANGED",
+          "message": "08·09의 Blender 3D 설계가 새 버전으로 바뀌어 기존 r1 결과는 이력으로 보존합니다.",
+          "blocking": true
+        }
+      ]
     },
     {
       "stage_id": "13-compose",
-      "status": "awaiting_review",
+      "status": "stale",
       "revision": 1,
       "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/13-compose/r1/artifact.json",
       "issues": [
         {
-          "code": "FINAL_PLAYBACK_REVIEW_REQUIRED",
-          "message": "실제 MP4/SRT 생성·기술 검사·화면 표본 확인 완료. 최종 영상의 정상 속도 전체 재생·청취 확인은 final 검토 대기.",
+          "code": "VISUAL_ENGINE_CHANGED",
+          "message": "08·09의 Blender 3D 설계가 새 버전으로 바뀌어 기존 r1 결과는 이력으로 보존합니다.",
           "blocking": true
         }
       ]
     },
     {
       "stage_id": "14-review",
-      "status": "awaiting_review",
+      "status": "stale",
       "revision": 1,
       "artifact_path": "projects/water-hydrogen-bond-surface-tension/stages/14-review/r1/artifact.json",
       "issues": [
         {
-          "code": "FINAL_PLAYBACK_REVIEW_REQUIRED",
-          "message": "근거·미확인 영역을 기록한 검수 보고 준비. 전체 재생·청취 미확인으로 recommendation=incomplete; 사용자 final 검토 대기.",
+          "code": "VISUAL_ENGINE_CHANGED",
+          "message": "08·09의 Blender 3D 설계가 새 버전으로 바뀌어 기존 r1 결과는 이력으로 보존합니다.",
           "blocking": true
         }
       ]
@@ -159,7 +189,7 @@
     },
     {
       "review_id": "scenes",
-      "decision": "approved",
+      "decision": "pending",
       "artifact_refs": [
         {
           "stage_id": "07-cuts",
@@ -167,18 +197,18 @@
         },
         {
           "stage_id": "08-scenes",
-          "revision": 1
+          "revision": 2
         },
         {
           "stage_id": "09-entities",
-          "revision": 1
+          "revision": 2
         }
       ],
-      "feedback": "승인합니다."
+      "feedback": ""
     },
     {
       "review_id": "final",
-      "decision": "pending",
+      "decision": "changes_requested",
       "artifact_refs": [
         {
           "stage_id": "13-compose",
@@ -189,7 +219,7 @@
           "revision": 1
         }
       ],
-      "feedback": ""
+      "feedback": "내용은 좋았지만 이미지의 퀄리티가 좋지 않았습니다. GPT-Image-2.5 Sunburst 대신에 blender로 3D 모델을 만들고 이것으로 영상을 만들수 있을까요?"
     }
   ]
 }
diff --git a/projects/water-hydrogen-bond-surface-tension/stages/08-scenes/r2/artifact.json b/projects/water-hydrogen-bond-surface-tension/stages/08-scenes/r2/artifact.json
new file mode 100644
index 0000000..fbb5911
--- /dev/null
+++ b/projects/water-hydrogen-bond-surface-tension/stages/08-scenes/r2/artifact.json
@@ -0,0 +1,25 @@
+{
+  "schema_version": "1.1",
+  "project_id": "water-hydrogen-bond-surface-tension",
+  "stage_id": "08-scenes",
+  "revision": 2,
+  "inputs": [
+    {
+      "stage_id": "03-script",
+      "revision": 1
+    },
+    {
+      "stage_id": "07-cuts",
+      "revision": 1
+    },
+    {
+      "stage_id": "02-research",
+      "revision": 1
+    }
+  ],
+  "payload": {
+    "scenes": [],
+    "connections": [],
+    "preview": null
+  }
+}
diff --git a/projects/water-hydrogen-bond-surface-tension/stages/09-entities/r2/artifact.json b/projects/water-hydrogen-bond-surface-tension/stages/09-entities/r2/artifact.json
new file mode 100644
index 0000000..37bdfe5
--- /dev/null
+++ b/projects/water-hydrogen-bond-surface-tension/stages/09-entities/r2/artifact.json
@@ -0,0 +1,29 @@
+{
+  "schema_version": "1.1",
+  "project_id": "water-hydrogen-bond-surface-tension",
+  "stage_id": "09-entities",
+  "revision": 2,
+  "inputs": [
+    {
+      "stage_id": "03-script",
+      "revision": 1
+    },
+    {
+      "stage_id": "08-scenes",
+      "revision": 2
+    },
+    {
+      "stage_id": "02-research",
+      "revision": 1
+    },
+    {
+      "stage_id": "07-cuts",
+      "revision": 1
+    }
+  ],
+  "payload": {
+    "characters": [],
+    "backgrounds": [],
+    "appearances": []
+  }
+}