TRELLIS 2 and Hunyuan3D are strong image-to-3D options with different control surfaces. TRELLIS 2 is the clearer fit for users who want Microsoft's open TRELLIS.2 model, explicit voxel resolution choices, and advanced sampling controls. The hosted Hunyuan3D v3.1 Pro endpoint is the clearer fit when target face count, optional PBR generation, geometry-only output, or multiple reference views are central to the job. A controlled export test is still required before declaring a quality winner.
Important version note
“Hunyuan3D” does not describe one interchangeable product.
- The hosted Hunyuan3D v3.1 Pro endpoint used on trellis2.com documents image and optional multi-view inputs, face-count control, PBR generation, and textured or geometry-only output.
- Tencent's public Hunyuan3D 2.1 repository publishes a different open release with model weights and training code.
Do not assume that the hosted v3.1 Pro endpoint has the same license, weights, requirements, or implementation as the public 2.1 repository. This comparison names the version whenever the distinction matters.
TRELLIS 2 vs Hunyuan3D at a glance
| Decision area | TRELLIS 2 | Hunyuan3D v3.1 Pro endpoint |
|---|---|---|
| Primary input | One reference image | One image with optional additional views |
| Main geometry control | 512³, 1024³, or 1536³ resolution; remesh and decimation controls | Target face count from 40,000 to 1,500,000 |
| Material control | PBR-oriented base color, roughness, metallic, and opacity | Optional PBR maps; textured or geometry-only generation |
| Hosted output here | GLB preview and download | GLB preview and download |
| Open release | Microsoft publishes TRELLIS.2 code and model | Tencent publishes Hunyuan3D 2.1, not the same named v3.1 Pro endpoint |
| Best fit | Resolution and sampling experiments; TRELLIS-specific workflows | Multi-view conditioning; explicit density and material choices |
Where TRELLIS 2 is distinct
Microsoft documents TRELLIS.2 as a 4B-parameter image-to-3D model using O-Voxel. The representation supports open surfaces, non-manifold geometry, internal structures, and PBR attributes. The official project documents:
- 512³, 1024³, and 1536³ output modes
- base color, roughness, metallic, and opacity attributes
- GLB export
- open code and model artifacts
- a supported local setup based on Linux and a high-memory NVIDIA GPU
The TRELLIS 2 premium generator adds texture size, remeshing, decimation target, seed, sampling, and guidance controls. This is useful when repeatability and resolution are more important than choosing a target face count directly.
Where Hunyuan3D v3.1 Pro is distinct
The hosted Hunyuan3D v3.1 Pro image-to-3D endpoint documents a different set of practical controls:
- optional front, back, left, and right reference images
- a target face count between 40,000 and 1,500,000
- normal textured generation or geometry-only output
- an optional PBR material workflow
- GLB or OBJ response assets at the API layer
Multiple views can reduce ambiguity when you already have consistent product renders from several angles. A face-count target is also easier to communicate to a downstream artist than a representation resolution. Neither feature guarantees that the resulting topology or hidden surfaces will satisfy a specific asset pipeline.
Open the Hunyuan3D model page for the documented controls or use the Hunyuan3D generator for a production run.
Which model should you choose?
Choose TRELLIS 2 when:
- you specifically need the Microsoft TRELLIS.2 model
- 512³ through 1536³ resolution experiments matter
- seed, sampling, guidance, remeshing, and texture controls are useful
- opacity materials or complex topology are part of the evaluation
- open upstream code and model access are requirements
Choose Hunyuan3D v3.1 Pro when:
- you can provide multiple consistent views of the same object
- a target face count is the most useful geometry constraint
- you want to switch between textured and geometry-only output
- you need an explicit PBR toggle in the hosted workflow
- GLB or OBJ delivery matches the next tool in your pipeline
The general image-to-3D workspace lets you keep the source image and acceptance criteria constant while switching models.
Fair benchmark checklist
A useful TRELLIS 2 vs Hunyuan3D benchmark should not compare a single lucky output. Publish:
- every source image and any extra Hunyuan views
- the exact model name, version, settings, and selected resolution or face count
- credits, queue time, runtime, retries, and failed generations
- original exported files
- Blender inspection results for silhouette, hidden geometry, topology, UVs, material maps, non-manifold edges, polygon count, and file size
- manual cleanup time before the asset meets one defined acceptance target
If Hunyuan receives extra views while TRELLIS receives one image, label that as a workflow comparison rather than a model-only comparison.
Frequently asked questions
Is Hunyuan3D v3.1 Pro open source?
Do not infer that from the Hunyuan3D name. Tencent publishes an open Hunyuan3D 2.1 repository, while the hosted endpoint discussed here is named v3.1 Pro. Verify the terms of the exact endpoint or model you use.
Which model supports higher resolution?
The models expose different controls, so the numbers are not directly comparable. TRELLIS 2 publishes representation resolutions up to 1536³. Hunyuan3D v3.1 Pro exposes a target face count up to 1.5 million.
Which one is better for multiple images?
The Hunyuan3D v3.1 Pro endpoint documents optional additional views. TRELLIS.2's standard public image-to-3D workflow starts from one image.
Do both produce PBR assets?
Both document PBR-oriented workflows. TRELLIS.2 includes base color, roughness, metallic, and opacity attributes; the Hunyuan endpoint offers an optional PBR mode for textured output.