Hunyuan3D 2 - Scaling Diffusion for High-Resolution Textured 3D Assets

TL;DR Hunyuan3D 2 uses a flow-based diffusion transformer for geometry, a dedicated paint model for 4K textures, and a suite of Turbo, mini, and mv checkpoints plus FlashVDM acceleration so teams can turn concept art into production-grade assets on commodity GPUs.

What is Hunyuan3D 2?

Hunyuan3D 2 is Tencent's second generation text and image conditioned 3D asset creator. The stack breaks the problem into shape and texture stages: a large Hunyuan3D-DiT flow transformer builds the mesh, while Hunyuan3D-Paint applies physically based textures that track the input prompt or concept art. The team ships everything under permissive terms alongside a hosted studio, API server, Gradio UI, and Blender add-on.

Links:

• GitHub: https://github.com/Tencent-Hunyuan/Hunyuan3D-2
• Technical report (2.0): https://arxiv.org/abs/2501.12202
• Technical report (2.5): https://arxiv.org/abs/2506.16504
• Demo: https://huggingface.co/spaces/tencent/Hunyuan3D-2
• Official site: https://3d.hunyuan.tencent.com

Why it matters for 3D and marketing teams

• Replace manual sculpt plus texture bake cycles with a prompt-to-ready mesh flow that respects product references.
• Keep iteration velocity high: Turbo and mini checkpoints cut denoising steps while FlashVDM and low VRAM modes keep RTX 4090 builds viable.
• Drop generated props straight into pipelines through GLB, OBJ, or Blender import with consistent UVs and PBR maps.
• Localise launches and campaigns fast by repainting hand-authored meshes with the paint model's texture-only mode.

System architecture highlights

• Two stage pipeline: mesh first, texture second, making it easy to texture imported meshes without regenerating geometry.
• Flow-matching diffusion transformer: scalable DiT backbone that improves alignment between silhouettes and conditioning images.
• High resolution texture synthesis: Hunyuan3D-Paint leans on geometric priors plus diffusion to deliver detailed albedo, normal, and roughness maps.
• Production tooling: official API server, Blender plug-in, and hosted studio reuse the same backend so teams can pick the integration that fits their stack.

Model zoo and accelerators

• Hunyuan3D-2 core: 1.1B DiT for image conditioned shape plus 1.3B paint model for textures.