Hunyuan 3D 3.1 / Hunyuan3D 3.1 Pro Image & Multi-View 3D Generator

Hunyuan 3D 3.1: image and multi-view inputs

Start with a single PNG, JPEG or WebP reference when one angle communicates the subject clearly. Ultra image generation costs 85 credits. Turning on PBR for that image raises the cost to 120 credits. You do not need to install the model or configure a local GPU to use the browser interface.

For several angles, switch the generator to Multi-view and keep Ultra selected. Supply 2–4 views of the same subject for 120 credits. Optional PBR in multi-view costs 150 credits in total. The displayed cost changes with the input mode and PBR setting; review it before submitting a generation.

Generate step by step

1. Sign in with Google or an email code. A new account with a verified email receives 60 trial credits once; an Ultra generation requires a larger balance.
2. Upload one image in image mode, or switch to Multi-view and supply 2–4 images. PNG, JPEG and WebP files up to 20 MB each are accepted.
3. Keep Ultra selected to use Hunyuan3D 3.1 Pro. Choose whether to enable PBR and check the final credit cost.
4. Submit the generation and inspect the completed model in the browser. Rotate around the object to check sides that were less visible in the references.
5. Download the original GLB or make an OBJ, STL or USDZ export in your browser. Use My models to return to completed work.

Failed generations are refunded automatically. For a completed model, inspect the geometry and surface appearance before deciding whether another generation is useful.

Prepare consistent views

Use one clearly framed subject with an uncluttered background and even lighting. Keep the whole object visible, including thin parts. For multi-view input, the pictures should show the same object with consistent proportions and appearance, rather than unrelated alternatives or different stages of a design.

Use the front slot for the main view and add relevant left, back or right views. Extra angles help communicate surfaces that a single photograph hides, but do not establish exact dimensions or guarantee every detail. Avoid mixing radically different lighting or perspective when it makes the object difficult to compare across views. Read the reference image guide before preparing a new set.

PBR and export choices

PBR is an optional material setting for Ultra image and multi-view generation. It changes the credit cost and material output; it is not a guarantee that the model will look identical in every renderer. Review the result under the lighting used in your destination application, especially for shiny, metallic or partially hidden surfaces.

Download the original GLB to retain the delivered model as a starting point. Browser exports to OBJ, STL and USDZ use no generation credits. Formats differ in how they represent geometry and materials, so confirm the exported appearance after import. STL is a geometry format and does not preserve the textured GLB appearance. Printing also requires separate scale, wall-thickness and surface checks.

Compare Ultra with Base and Pro

Base and Pro image generation use Microsoft TRELLIS.2 at 512 and 1024 respectively, for 25 and 45 credits. They are separate model choices from Hunyuan3D 3.1 Pro. Read the TRELLIS.2 image-to-3D page if you want to start with those single-image options before spending more credits on Ultra.

The older Hunyuan 2 path and Hunyuan 2.1 path remain available for existing links. Their current image tiers use TRELLIS.2; the historical URL names do not describe the Ultra model. This page is the focused guide to the current Hunyuan3D 3.1 Pro option.

Questions about credits and results

Are the 60 trial credits enough for Ultra?

No. A single Ultra image generation costs 85 credits. Review plans and credit balances before starting; Base image generation costs 25 credits if you want to begin within the starter balance.

Does multi-view include PBR at 120 credits?

No. Multi-view without PBR costs 120 credits. Enabling PBR raises the total to 150. Single-image PBR costs 120.

Can I use the result directly in a game or print?

Review topology, scale, materials and the underlying model terms for your intended use. Generated geometry does not automatically include a rig, animation or fabrication validation. Failed generations return their credits automatically.