混元 3D 2.1

[//]: # (  )

[//]: # (  )

[//]: # (  )

🔥 News

- Jul 26, 2025: 🤗 We release the first open-source, simulation-capable, immersive 3D world generation model, HunyuanWorld-1.0!
- Jun 19, 2025: 👋 We present the technical report of Hunyuan3D-2.1, please check out the details and spark some discussion!
- Jun 13, 2025: 🤗 We release the first production-ready 3D asset generation model, Hunyuan3D-2.1!

> Join our Wechat and Discord group to discuss and find help from us.

| Wechat Group                                     | Xiaohongshu                                           | X                                           | Discord                                           |

🤗 Community Contribution Leaderboard
1. By @visualbruno
  - ComfyUI-Hunyuan3d-2-1: https://github.com/visualbruno/ComfyUI-Hunyuan3d-2-1
2. By @VR-Jobs
  - Hunyuan3d-2-1 Unity Support: https://github.com/VR-Jobs/Hunyuan3D-2.1-Unity-XR-PC-Phone

☯️ Hunyuan3D 2.1

Architecture

Tencent Hunyuan3D-2.1 is a scalable 3D asset creation system that advances state-of-the-art 3D generation through two pivotal innovations: Fully Open-Source Framework and  Physically-Based Rendering (PBR) Texture Synthesis. For the first time, the system releases full model weights and training code, enabling community developers to directly fine-tune and extend the model for diverse downstream applications. This transparency accelerates academic research and industrial deployment. Moreover, replacing the prior RGB-based texture model, the upgraded PBR pipeline leverages  physics-grounded material simulation  to generate textures with photorealistic light interaction (e.g., metallic reflections, subsurface scattering).

Performance

We have evaluated Hunyuan3D 2.1 with other open-source as well as close-source 3d-generation methods.
The numerical results indicate that Hunyuan3D 2.1 surpasses all baselines in the quality of generated textured 3D assets
and the condition following ability.

| Model                   | ULIP-T(⬆)   | ULIP-I(⬆) | Uni3D-T(⬆)      | Uni3D-I(⬆) |
| Michelangelo  | 0.0752     | 0.1152      | 0.2133     | 0.2611         |
| Craftsman | 0.0745     | 0.1296      | 0.2375     | 0.2987         |
| TripoSG | 0.0767     | 0.1225      | 0.2506     | 0.3129       |
| Step1X-3D | 0.0735     | 0.1183      | 0.2554     | 0.3195         |
| Trellis | 0.0769     | 0.1267      | 0.2496     | 0.3116         |
| Direct3D-S2 | 0.0706     | 0.1134      | 0.2346     | 0.2930         |
| Hunyuan3D-Shape-2.1           | 0.0774 | 0.1395  | 0.2556 | 0.3213 |

| Model                   | CLIP-FiD(⬇)   | CMMD(⬇) | CLIP-I(⬆)      | LPIPS(⬇) |
| SyncMVD-IPA  | 28.39     | 2.397      | 0.8823     | 0.1423         |
| TexGen | 28.24     | 2.448      | 0.8818     | 0.1331         |
| Hunyuan3D-2.0 | 26.44     | 2.318     | 0.8893     | 0.1261         |
| Hunyuan3D-Paint-2.1           | 24.78 | 2.191  | 0.9207 | 0.1211     |

🎁 Models Zoo

It takes 10 GB VRAM for shape generation, 21GB for texture generation and 29GB for shape and texture generation in total.

| Model                      | Description                 | Date       | Size | Huggingface

……（后略，见原文）