| Feature | Diffusion (Free) | Twilight Render Free | Kerkythea | |--------|----------------|----------------------|-----------| | AI-generated | ✅ Yes | ❌ No | ❌ No | | Cloud-based | ✅ Yes | ❌ No (CPU only) | ❌ No | | Learning time | 5 minutes | 2 hours | 3 hours | | Photorealism | ★★★★☆ | ★★★☆☆ | ★★★★☆ | | Output resolution | 1024x1024 | 800x600 | Unlimited but slow |

For most users, Diffusion offers the fastest path from 3D model to compelling image.

Verdict: Best for material synthesis, but not permanently free.

Note: These plugins run inside SketchUp (Windows / macOS). Always check compatibility with your SketchUp version before installing.

  • Limitations: Free versions often limit quantities or advanced controls (collision/overlap management).
  • Popular scripts: "SUtoSD" (GitHub), "ControlNet Exporter" (SketchUcation).
  • Requirements: NVIDIA GPU (4GB+ VRAM), Automatic1111/ComfyUI installed.
  • Download: GitHub (search "SketchUp ControlNet exporter").

    • Verdict: Most powerful and completely free, but requires technical setup.

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