{
  "job": "new_background",
  "rank": 4,
  "short": "new background",
  "title": {
    "zh": "换场景·人物不变",
    "en": "New scene, same character"
  },
  "about": {
    "zh": "自动抠出人物，只按新场景重画背景。",
    "en": "Cuts the character out and redraws only the background as the new scene."
  },
  "source": {
    "zh": "常见的“抠图换背景”做法：inspyrenet-rembg 抠人物，反选成背景，用 ComfyUI 自带的局部重绘节点只重画背景",
    "en": "The common cut-out-and-replace-the-background way: inspyrenet-rembg finds the character, its inverse is the background, ComfyUI's own inpainting nodes redraw only that"
  },
  "packs": {
    "InspyrenetRembg": "comfyui-inspyrenet-rembg"
  },
  "takes": "picture",
  "nodes": {
    "picture": {
      "class_type": "LoadImage",
      "inputs": {
        "image": "$image"
      }
    },
    "cut": {
      "class_type": "InspyrenetRembg",
      "inputs": {
        "image": [
          "picture",
          0
        ],
        "torchscript_jit": "default"
      }
    },
    "background": {
      "class_type": "InvertMask",
      "inputs": {
        "mask": [
          "cut",
          1
        ]
      }
    },
    "edge": {
      "class_type": "GrowMask",
      "inputs": {
        "mask": [
          "background",
          0
        ],
        "expand": 6,
        "tapered_corners": true
      }
    },
    "soft": {
      "class_type": "DifferentialDiffusion",
      "inputs": {
        "model": [
          "$sampler.model",
          "*"
        ]
      },
      "wire_to": "$sampler"
    },
    "encode": {
      "class_type": "VAEEncode",
      "inputs": {
        "pixels": [
          "picture",
          0
        ],
        "vae": [
          "$decode.vae",
          "*"
        ]
      }
    },
    "area": {
      "class_type": "SetLatentNoiseMask",
      "inputs": {
        "samples": [
          "encode",
          0
        ],
        "mask": [
          "edge",
          0
        ]
      },
      "wire_to": "$sampler"
    },
    "look": {
      "class_type": "PreviewImage",
      "inputs": {
        "images": [
          "cut",
          0
        ]
      }
    }
  },
  "roles": {
    "sampler": {
      "denoise": 1.0
    }
  },
  "after": "Write the new scene in the prompt and keep the character's own words (who, hair, clothes) so its edge fits, then run_workflow. The picture's size is the drawing's: the empty latent is no longer used. The kept character (cut out) is among the run's previews: if part of it is missing or the old background clings to it, say so; a halo at its edge: raise the GrowMask expand (6) a little.",
  "notes": "Denoise 1.0: the background is drawn anew, not changed. GrowMask lets the background reach 6 px into the character so the seam is redrawn.",
  "models": [],
  "tested": {
    "gpu": "RTX 4050 Laptop",
    "vram_gb": 6,
    "date": "2026-10-28",
    "runs": [
      {
        "model": "SDXL (Illustrious)",
        "size": "832×1216",
        "seconds": 30
      }
    ]
  }
}