diff --git a/tools/blender/inside.py b/tools/blender/inside.py
index 3bc4344..6112531 100644
--- a/tools/blender/inside.py
+++ b/tools/blender/inside.py
@@ -37,6 +37,8 @@ def main():
                   frame_start=scene.frame_start, frame_end=scene.frame_end,
                   logical_to_blender="logical_frame + 1", external_links=False)
     if job["operation"] == "render":
+        # frame_set과 렌더의 depsgraph가 같은 Scene을 평가하도록 활성 컨텍스트를 맞춘다.
+        bpy.context.window.scene = scene
         profile = job["profile"]
         scene.render.engine = profile["engine"]
         scene.render.resolution_x = profile["width"]
diff --git a/tools/blender/smoke.py b/tools/blender/smoke.py
index 32bf4cb..07fb684 100644
--- a/tools/blender/smoke.py
+++ b/tools/blender/smoke.py
@@ -3,23 +3,54 @@ import argparse
 import json
 from pathlib import Path
 import shutil
+import subprocess
+
+from PIL import Image
 
 import run
 from test_runner import fixture, production_fixture, endpoint_fixture, ROOT
 from test_runner import write
 
 
+def pixels(path):
+    with Image.open(path) as image:
+        return image.convert("RGB").tobytes()
+
+
+def check_motion(evidence, ffmpeg):
+    frames = evidence["logical_frames"]
+    checked = [frames[0], frames[len(frames) // 2], frames[-1]]
+    media = evidence["media"]
+    attempt = (ROOT / media["path"]).parent
+    rendered_samples = [pixels(attempt / ("frame-" + str(f).zfill(8) + ".png")) for f in checked]
+    # H.264 프레임마다 달라질 수 있는 양자화 흔적을 원본 3D 움직임으로 오인하지 않는다.
+    run.require(len(set(rendered_samples)) == 3, "디코드 PNG RGB 시작/중간/끝에서 3D 움직임이 없습니다: " + evidence["scene_name"])
+    decoded = subprocess.run([ffmpeg, "-v", "error", "-xerror", "-i", str(ROOT / media["path"]),
+        "-map", "0:v:0", "-pix_fmt", "rgb24", "-c:v", "rawvideo", "-f", "image2pipe", "-"], capture_output=True)
+    run.require(decoded.returncode == 0, "MP4 RGB 디코드가 실패했습니다: " + decoded.stderr.decode("utf-8", errors="replace")[-1000:])
+    size = media["width"] * media["height"] * 3
+    run.require(len(decoded.stdout) == size * len(frames), "실제 RGB 디코드 프레임 수가 다릅니다")
+    samples = [decoded.stdout[index * size:(index + 1) * size] for index in (0, len(frames) // 2, len(frames) - 1)]
+    run.require(len(set(samples)) == 3, "디코드 MP4 RGB 시작/중간/끝에서 3D 움직임이 없습니다: " + evidence["scene_name"])
+    return checked
+
+
 def main():
     parser = argparse.ArgumentParser(description="설치 정보가 아닌 실제 렌더·디코드 검사")
     parser.add_argument("--blender", required=True)
     parser.add_argument("--ffmpeg", required=True)
     parser.add_argument("--ffprobe", required=True)
     parser.add_argument("--engine", choices=("CYCLES", "BLENDER_EEVEE"), default="CYCLES")
+    parser.add_argument("--animation-only", action="store_true", help="50fps·5프레임으로 비활성 Scene의 실제 RGB 움직임만 검사")
     args = parser.parse_args()
     folder, project, artifacts, job = fixture()
     if args.engine == "BLENDER_EEVEE":
         artifacts["08-scenes"]["payload"]["preview"]["render_profile"].update(engine="BLENDER_EEVEE", device="GPU")
         write(ROOT / job["artifact"], artifacts["08-scenes"])
+    if args.animation_only:
+        artifacts["08-scenes"]["payload"]["preview"]["render_profile"]["fps"] = 50
+        job["end"] = 5
+        write(ROOT / job["artifact"], artifacts["08-scenes"])
     source = ROOT / job["source"]
     # fixture의 검사 전 바이트는 생성 원본이 아니다. 실패 흔적은 별도 파일로 보존한다.
     source.rename(source.with_suffix(".uninspected"))
@@ -27,14 +58,26 @@ def main():
                  Path(__file__).with_name("smoke_fixture.py"), "--", source])
     video = run.render(ROOT, job, args.blender, args.ffmpeg, args.ffprobe)
     require = run.require
-    require(video["media"]["duration_ms"] == 1000, "검사 영상 길이 불일치")
-    attempt = (ROOT / video["media"]["path"]).parent
-    require(run.digest(attempt / "frame-00000000.png") != run.digest(attempt / "frame-00000009.png"), "3D 움직임이 없습니다")
-    still_job = dict(job, frame=10, start=None, end=None)
+    require(video["media"]["duration_ms"] == (100 if args.animation_only else 1000), "검사 영상 길이 불일치")
+    second_video = run.render(ROOT, dict(job, scene="SceneB", require_object=["BallB"]), args.blender, args.ffmpeg, args.ffprobe)
+    motion_checks, errors = [], []
+    for rendered in (video, second_video):
+        try:
+            motion_checks.append(check_motion(rendered, args.ffmpeg))
+        except ValueError as error:
+            errors.append(str(error))
+    require(not errors, "\n".join(errors))
+    first_motion, second_motion = motion_checks
+    still_job = dict(job, frame=4 if args.animation_only else 10, start=None, end=None)
     first = run.render(ROOT, still_job, args.blender, args.ffmpeg, args.ffprobe)
-    second = run.render(ROOT, dict(still_job, scene="SceneB"), args.blender, args.ffmpeg, args.ffprobe)
-    require(first["identity"] != second["identity"] and run.digest(ROOT / first["media"]["path"]) != run.digest(ROOT / second["media"]["path"]),
+    second = run.render(ROOT, dict(still_job, scene="SceneB", require_object=["BallB"]), args.blender, args.ffmpeg, args.ffprobe)
+    require(first["identity"] != second["identity"] and pixels(ROOT / first["media"]["path"]) != pixels(ROOT / second["media"]["path"]),
             "같은 논리 프레임의 다른 Scene 카메라가 혼입되었습니다")
+    if args.animation_only:
+        print(json.dumps(dict(first_video=video["media"], second_video=second_video["media"],
+            first_rgb_frames=first_motion, second_rgb_frames=second_motion, first_scene=first["media"], second_scene=second["media"],
+            renderer=video["render_profile"], source=video["scene_file"], result="초기 Idle Scene과 무관한 두 Scene의 디코드 RGB 움직임·5프레임·100ms·같은 시각의 Scene 구별 검사 통과"), ensure_ascii=False, indent=2))
+        return
     for invalid in (dict(still_job, scene="Missing"), dict(still_job, require_object=["Missing"])):
         try:
             run.render(ROOT, invalid, args.blender, args.ffmpeg, args.ffprobe)
diff --git a/tools/blender/smoke_fixture.py b/tools/blender/smoke_fixture.py
index efc7fca..9f66790 100644
--- a/tools/blender/smoke_fixture.py
+++ b/tools/blender/smoke_fixture.py
@@ -1,4 +1,4 @@
-"""실행 검사 전용 3D 구와 두 카메라를 만든다. 제작 내용과 무관하다."""
+"""실행 검사 전용 두 애니메이션 Scene과 초기 Idle Scene을 만든다."""
 import sys
 
 import bpy
@@ -34,7 +34,10 @@ scene.camera = camera
 second = bpy.data.scenes.new("SceneB")
 second.frame_start, second.frame_end = 1, 21
 second.world = scene.world
-second.collection.objects.link(ball)
+second_ball = ball.copy()
+second_ball.data = ball.data.copy()
+second_ball.name = "BallB"
+second.collection.objects.link(second_ball)
 second.collection.objects.link(light)
 other = camera.copy()
 other.data = camera.data.copy()
@@ -42,6 +45,13 @@ other.location = (5, -7, 1)
 other.rotation_euler = (-other.location).to_track_quat("-Z", "Y").to_euler()
 second.collection.objects.link(other)
 second.camera = other
+idle = bpy.data.scenes.new("Idle")
+idle.world = scene.world
+idle_camera = camera.copy()
+idle_camera.data = camera.data.copy()
+idle.collection.objects.link(idle_camera)
+idle.camera = idle_camera
+bpy.context.window.scene = idle
 if "--external-image" in sys.argv:
     bpy.data.images.load(sys.argv[sys.argv.index("--external-image") + 1]).use_fake_user = True
 if "--short-scene" in sys.argv: