> For clean Markdown of any page, append .md to the page URL. > For a complete documentation index, see https://docs.empiriolabs.ai/llms.txt. > For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.empiriolabs.ai/_mcp/server. # TRELLIS.2 4B > TRELLIS.2 image-to-3D model that turns a reference image into a textured GLB asset with resolution, seed, mesh, texture, and export controls. ![TRELLIS.2 4B](https://media.empiriolabs.ai/model-logos/trellis-2-4b.png) [Microsoft](/providers/microsoft) · 3D Generation `POST /v1/3d/generations` TRELLIS.2 image-to-3D model that turns a reference image into a textured GLB asset with resolution, seed, mesh, texture, and export controls. ## At a glance | Field | Value | | ------------------- | ---------------------------------------------------------------------------- | | Model id | `trellis-2-4b` | | Model release date | - | | Input modalities | Image | | Output modalities | 3D | | Context window | - | | Weight precision | Mixed BF16/FP16 | | Features | image\_to\_3d, glb\_output, pbr\_materials, seed\_control, commercial\_ready | | Native inference | Yes | | New | No | | Supported endpoints | `POST /v1/3d/generations` | | Alternate model ids | `microsoft/trellis.2-4b`, `trellis-2` | ## Pricing | Charge | Spec | Rate | | ---------- | ----------- | -------------------- | | 512 asset | per request | \$0.025 (was \$0.25) | | 1024 asset | per request | \$0.249 (was \$0.30) | | 1536 asset | per request | \$0.499 | ## Example request ```bash curl https://api.empiriolabs.ai/v1/3d/generations \ -H 'Authorization: Bearer $EMPIRIOLABS_API_KEY' \ -H 'Content-Type: application/json' \ -d '{"model": "trellis-2-4b", "image_url": "https://example.com/product-photo.png", "resolution": "1024", "texture_size": "2048"}' ``` ## Parameters | Parameter | Type | Required | Default | Description | | ------------------------------------ | ------- | -------- | ---------------- | --------------------------------------------------------------------------------------------------------------------------------------- | | `image` | image | yes | - | Reference image URL, data URI, or uploaded image object. | | `resolution` | enum | no | `"1024"` | Voxel grid resolution. Higher values are slower and more detailed. · Allowed: `512`, `1024`, `1536` | | `pipeline_type` | enum | no | `"1024_cascade"` | Explicit TRELLIS pipeline. Leave on 1024 cascade unless you need the 512 or 1536 path. · Allowed: `512`, `1024_cascade`, `1536_cascade` | | `seed` | integer | no | `42` | Random seed for reproducible generations. · Range: 0 – 2147483647 | | `preprocess_image` | boolean | no | true | Remove background and normalize the reference image before generation. | | `max_num_tokens` | integer | no | `49152` | Maximum sparse tokens used for cascade generation. · Range: 1024 – 131072 | | `ss_sampling_steps` | integer | no | `12` | Sampler steps for sparse structure generation. · Range: 1 – 64 | | `ss_guidance_strength` | number | no | `7.5` | Guidance strength for sparse structure generation. · Range: 0 – 20 | | `ss_guidance_rescale` | number | no | `0.7` | Guidance rescale for sparse structure generation. · Range: 0 – 2 | | `ss_guidance_interval_start` | number | no | `0.6` | Start of the sparse-structure guidance interval. · Range: 0 – 1 | | `ss_guidance_interval_end` | number | no | `1` | End of the sparse-structure guidance interval. · Range: 0 – 1 | | `ss_rescale_t` | number | no | `5` | Rescale temperature for sparse structure generation. · Range: 0 – 20 | | `shape_slat_sampling_steps` | integer | no | `12` | Sampler steps for shape structured latent generation. · Range: 1 – 64 | | `shape_slat_guidance_strength` | number | no | `7.5` | Guidance strength for shape structured latent generation. · Range: 0 – 20 | | `shape_slat_guidance_rescale` | number | no | `0.5` | Guidance rescale for shape structured latent generation. · Range: 0 – 2 | | `shape_slat_guidance_interval_start` | number | no | `0.6` | Start of the shape SLat guidance interval. · Range: 0 – 1 | | `shape_slat_guidance_interval_end` | number | no | `1` | End of the shape SLat guidance interval. · Range: 0 – 1 | | `shape_slat_rescale_t` | number | no | `3` | Rescale temperature for shape structured latent generation. · Range: 0 – 20 | | `tex_slat_sampling_steps` | integer | no | `12` | Sampler steps for texture structured latent generation. · Range: 1 – 64 | | `tex_slat_guidance_strength` | number | no | `1` | Guidance strength for texture structured latent generation. · Range: 0 – 20 | | `tex_slat_guidance_rescale` | number | no | `0` | Guidance rescale for texture structured latent generation. · Range: 0 – 2 | | `tex_slat_guidance_interval_start` | number | no | `0.6` | Start of the texture SLat guidance interval. · Range: 0 – 1 | | `tex_slat_guidance_interval_end` | number | no | `0.9` | End of the texture SLat guidance interval. · Range: 0 – 1 | | `tex_slat_rescale_t` | number | no | `3` | Rescale temperature for texture structured latent generation. · Range: 0 – 20 | | `texture_size` | enum | no | `"2048"` | Texture resolution baked onto the GLB material. · Allowed: `1024`, `2048`, `4096` | | `decimation_target` | integer | no | `500000` | Approximate target vertex count for the exported mesh. · Range: 10000 – 1000000 | | `remesh` | boolean | no | true | Rebuild mesh topology before UV unwrapping and texture baking. | | `remesh_band` | number | no | `1` | Remeshing band size. · Range: 0 – 5 | | `remesh_project` | number | no | `0.9` | Projection factor used during remeshing. · Range: 0 – 1 | | `uv_unwrap_angle_threshold_deg` | number | no | `90` | Cone half-angle threshold used for UV unwrap clustering. · Range: 1 – 180 | | `uv_unwrap_refine_iterations` | integer | no | `0` | UV clustering refinement iterations. · Range: 0 – 10 | | `uv_unwrap_global_iterations` | integer | no | `1` | Global UV clustering iterations. · Range: 0 – 10 | | `uv_unwrap_smooth_strength` | number | no | `1` | UV cluster smoothing strength. · Range: 0 – 10 | | `response_format` | enum | no | `"url"` | Return signed media URLs by default, or inline base64 JSON when requested. · Allowed: `url`, `b64_json` | | `verbose` | boolean | no | false | Enable verbose mesh export logging. | ## Notes **Defaults** * 1024 cascade pipeline * 12 sampler steps per stage * 2048 texture size * 500k decimation target * GLB output **Controls** Supports image URL or upload, 512/1024/1536 resolution, seed, pipeline type, sampler guidance/interval/rescale controls, texture size, mesh decimation, remeshing, UV unwrap tuning, and URL or base64 output. Billing is per generated 3D asset. --- *Machine-readable schema:* `GET https://api.empiriolabs.ai/v1/models/trellis-2-4b`.