kevinbadi/blender-skills

perfect-loop

Seamless looping 360-degree turntable.

소스 보기

사용 방법

  1. 설치 명령을 복사하고 자신의 에이전트 환경에 설치하기 전에 소스 패키지를 확인하세요.
  2. 필요한 도구, 인증 정보, 지원 환경은 원본 문서에서 확인하세요.
  3. 입력과 원하는 산출물을 설명하고 출처와 결과를 대조하세요.
npx skills add https://github.com/kevinbadi/blender-skills --skill perfect-loop

시작 전 확인

  • 설치에는 모델 구독, API 한도, 파일 접근 권한이 포함되지 않습니다.
  • 별점 수와 설치 수는 활동 지표이며 독립적인 품질·보안 검증이 아닙니다.
원본 Skill 문서

원본 저장소의 제목, 예시, 코드, 표, 링크, 이미지를 유지해 표시합니다.

Perfect Loop Camera Animation

A seamless 360-degree turntable where the last frame connects perfectly to the first frame, creating an infinite loop. Ideal for website backgrounds, social media, and product page embeds.

When to Use

  • User wants a "looping" or "seamless" animation
  • User says "perfect loop", "infinite loop", "GIF", "looping turntable"
  • Website product embed, social media loop

Parameters

ParameterDefaultDescription
duration5Video length in seconds
fps24Frames per second
camera_distance4.0Distance from object
camera_height2.0Camera height
camera_lens50Focal length

Flow

Step 1: Set Up Camera Rig

python
import bpy, math

bpy.ops.object.empty_add(type='PLAIN_AXES', location=(0, 0, 0))
tgt = bpy.context.active_object
tgt.name = 'PerfectLoopTarget'

bpy.ops.object.camera_add(location=(0, -CAMERA_DISTANCE, CAMERA_HEIGHT))
cam = bpy.context.active_object
cam.name = 'PerfectLoopCam'
cam.data.lens = CAMERA_LENS

trk = cam.constraints.new(type='TRACK_TO')
trk.target = tgt
trk.track_axis = 'TRACK_NEGATIVE_Z'
trk.up_axis = 'UP_Y'

bpy.ops.object.select_all(action='DESELECT')
cam.select_set(True)
tgt.select_set(True)
bpy.context.view_layer.objects.active = tgt
bpy.ops.object.parent_set(type='OBJECT', keep_transform=True)

bpy.context.scene.camera = cam

Step 2: Animate Seamless Loop

Critical: Keyframe 360 degrees at frame N+1 (one past the last rendered frame). This way frame N and frame 1 are adjacent in the loop, not duplicated.

python
TOTAL_FRAMES = DURATION * FPS  # 120

scene = bpy.context.scene
scene.frame_start = 1
scene.frame_end = TOTAL_FRAMES  # render 1-120
scene.render.fps = FPS

tgt.rotation_euler = (0, 0, 0)
tgt.keyframe_insert(data_path='rotation_euler', frame=1)

# 360 at frame 121 — frame 121 is NOT rendered, but ensures
# frame 120 is one step before frame 1, creating seamless loop
tgt.rotation_euler = (0, 0, math.radians(360))
tgt.keyframe_insert(data_path='rotation_euler', frame=TOTAL_FRAMES + 1)

# LINEAR interpolation is CRITICAL for perfect loop
action = tgt.animation_data.action
strip = action.layers[0].strips[0]
for cb in strip.channelbags:
    for fc in cb.fcurves:
        for kp in fc.keyframe_points:
            kp.interpolation = 'LINEAR'

Step 3: Render + Encode

bash
ffmpeg -y -framerate 24 \
  -i "~/Desktop/Blender Videos/perfect_loop_frames/%04d.png" \
  -c:v prores_ks -profile:v 4444 -pix_fmt yuva444p10le \
  "~/Desktop/Blender Videos/perfect_loop.mov"

Critical Notes

  • LINEAR interpolation only — BEZIER will cause the loop to stutter at the seam
  • Keyframe at N+1: Place the 360-degree keyframe one frame PAST the render range
  • No camera movement: Camera distance, height, and lens must be static (no keyframes on these)
  • Verify loop: Play the video on repeat to confirm seamless transition
  • Good for encoding to looping formats: GIF, WebM, or MP4 with -loop 0

관련 작업

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