Tencent open-sources Hunyuan3D 2.0

Background

3D generation systems create three-dimensional objects with both geometry and surface appearance. Hunyuan3D 2.0 is Tencent's system for generating high-resolution textured 3D assets ^[2].

A mesh is the set of connected polygons that defines an object's shape, and a texture map is an image wrapped around that mesh to supply color and surface detail. Generating both automatically is harder than producing a single image, because the shape must stay consistent from every viewing angle. A condition image is a reference picture that the generated shape is meant to match. Both steps are needed for a usable result: a shape without texture looks unfinished, and a texture cannot be applied correctly without a well-formed shape.

What happened

On 21 January 2025 Tencent released the Hunyuan3D 2.0 inference code and pretrained models ^[1]. The technical report, titled Hunyuan3D 2.0: Scaling Diffusion Models for High Resolution Textured 3D Assets Generation, was posted the same day ^[2].

Key details

The system pairs the Hunyuan3D-DiT shape model with the Hunyuan3D-Paint texture model ^[2]. Tencent claimed it outperformed previous open-source and closed-source models in geometry detail, condition alignment and texture quality ^[2]. Shape-only generation needs about 6 GB of VRAM ^[1].

A Blender add-on followed on 27 January 2025, and a guidance-distilled fast DiT model on 3 February 2025 ^[1]. Blender is a widely used 3D modeling program, and an add-on adds new functions to it. Guidance distillation is a training technique that makes a diffusion model produce results in fewer steps.

Impact

The release made the models and code available for users to run and test directly. The Blender add-on let users call the system from a widely used 3D tool ^[1].

Models that generate usable 3D assets are useful to people who build games, films or product visualizations, since such assets have traditionally been modeled by hand. Tools that bring such models into existing 3D software reduce the effort of adopting them.