API reference · trellis

trellis/trellis-2

Integrate this model through SandBase's unified API, with production-ready schemas and examples.

IMAGEAsyncOpen model

Production endpoint

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OpenAI-compatible endpoint with unified authentication and usage tracking.

POSThttps://api.sandbase.ai/v1/run

Model IDtrellis/trellis-2

Input Schema

30 parameters · 1 required · 29 optional

Parameter	Type	Required	Description
`image`	string	Required	URL of the input image to convert to 3D
`seed`	integer	Optional	Random seed for reproducibility
`remesh`	boolean	Optional	Rebuild the mesh topology for cleaner triangles. Slower but usually produces better results for downstream use (animation, 3D printing, etc). · Default: true
`resolution`	integer	Optional	Output resolution; higher is slower but more detailed · Options: 512, 1024, 1536 · Default: 1024 51210241536
`remesh_band`	number	Optional	Controls how far remeshing can move vertices from the original surface. Higher values allow more smoothing but may lose fine details. · Min: 0 · Max: 4 · Default: 1
`ss_rescale_t`	number	Optional	Controls noise schedule sharpness for structure generation. Higher values produce sharper transitions. · Min: 1 · Max: 6 · Default: 5
`texture_size`	integer	Optional	Resolution of the texture image baked onto the mesh. Higher values capture finer surface details but produce larger files. · Options: 1024, 2048, 4096 · Default: 2048 102420484096
`remesh_project`	number	Optional	How much to project remeshed vertices back onto the original surface. 0 = no projection (smoother), 1 = full projection (preserves detail). · Min: 0 · Max: 1 · Default: 0
`decimation_target`	integer	Optional	Target number of vertices in the final mesh. Lower values produce smaller files but less detail. 500k is good for most uses, reduce to 20k-50k for web/mobile. · Min: 5000 · Max: 2000000 · Default: 500000
`ss_sampling_steps`	integer	Optional	Number of denoising steps for the initial structure. More steps = slower but potentially higher quality. · Min: 1 · Max: 50 · Default: 12
`tex_slat_rescale_t`	number	Optional	Controls noise schedule sharpness for texture generation. Higher values produce sharper texture details. · Min: 1 · Max: 6 · Default: 3
`ss_guidance_rescale`	number	Optional	Dampens artifacts from high guidance in stage 1. Lower values allow stronger guidance effects, higher values stabilize the output. · Min: 0 · Max: 1 · Default: 0.7
`shape_slat_rescale_t`	number	Optional	Controls noise schedule sharpness for shape refinement. Higher values produce sharper geometric details. · Min: 1 · Max: 6 · Default: 3
`ss_guidance_strength`	number	Optional	How closely the initial 3D structure follows the input image. Higher values produce more faithful but potentially noisier results. · Min: 0 · Max: 10 · Default: 7.5
`tex_slat_sampling_steps`	integer	Optional	Number of denoising steps for texture generation. More steps = slower but potentially cleaner textures. · Min: 1 · Max: 50 · Default: 12
`ss_guidance_interval_end`	number	Optional	Fraction of the denoising process at which classifier-free guidance ends for stage 1 (sparse structure). Must be >= ss_guidance_interval_start. · Min: 0 · Max: 1 · Default: 1
`shape_slat_sampling_steps`	integer	Optional	Number of denoising steps for shape refinement. More steps = slower but potentially smoother geometry. · Min: 1 · Max: 50 · Default: 12
`tex_slat_guidance_rescale`	number	Optional	Dampens artifacts from high guidance in the texture stage. Increase if textures look noisy or have color banding. · Min: 0 · Max: 1 · Default: 0
`uv_unwrap_smooth_strength`	number	Optional	Smoothing strength applied to UV chart boundaries. Higher values reduce visible seams but may introduce UV distortion. · Min: 0 · Max: 10 · Default: 1
`ss_guidance_interval_start`	number	Optional	Fraction of the denoising process at which classifier-free guidance starts for stage 1 (sparse structure). Guidance is only applied between interval_start and interval_end; outside this window the model runs unguided. Lower values apply guidance earlier. · Min: 0 · Max: 1 · Default: 0.6
`tex_slat_guidance_strength`	number	Optional	How closely the texture follows the input image colors. Higher values produce more vivid but potentially oversaturated textures. · Min: 0 · Max: 10 · Default: 1
`shape_slat_guidance_rescale`	number	Optional	Dampens artifacts from high guidance in the shape stage. Increase if you see noisy geometry. · Min: 0 · Max: 1 · Default: 0.5
`uv_unwrap_global_iterations`	integer	Optional	Number of global clustering passes during UV chart computation. More passes produce more balanced charts. · Min: 1 · Max: 10 · Default: 1
`uv_unwrap_refine_iterations`	integer	Optional	Number of local refinement passes during UV chart computation. Higher values produce cleaner chart boundaries at the cost of additional UV-unwrap time. · Min: 0 · Max: 10 · Default: 0
`shape_slat_guidance_strength`	number	Optional	How closely the detailed geometry follows the input image. Higher values add more detail but may introduce noise. · Min: 0 · Max: 10 · Default: 7.5
`uv_unwrap_angle_threshold_deg`	number	Optional	Maximum angle (in degrees) between adjacent face normals allowed within a single UV chart. Lower values produce more charts with less distortion; higher values produce fewer, larger charts with potentially more stretching. · Min: 0 · Max: 180 · Default: 90
`tex_slat_guidance_interval_end`	number	Optional	Fraction of the denoising process at which classifier-free guidance ends for stage 3 (texture). Must be >= tex_slat_guidance_interval_start. · Min: 0 · Max: 1 · Default: 0.9
`shape_slat_guidance_interval_end`	number	Optional	Fraction of the denoising process at which classifier-free guidance ends for stage 2 (shape refinement). Must be >= shape_slat_guidance_interval_start. · Min: 0 · Max: 1 · Default: 1
`tex_slat_guidance_interval_start`	number	Optional	Fraction of the denoising process at which classifier-free guidance starts for stage 3 (texture). Guidance is only applied between interval_start and interval_end. · Min: 0 · Max: 1 · Default: 0.6
`shape_slat_guidance_interval_start`	number	Optional	Fraction of the denoising process at which classifier-free guidance starts for stage 2 (shape refinement). Guidance is only applied between interval_start and interval_end. · Min: 0 · Max: 1 · Default: 0.6

Output Schema

Field	Type	Description
`id`	string	Unique identifier for the generation task
`status`	string	Task status: pending, running, completed, failed, timeout
`model`	string	Model used for the generation
`outputs`	array	Array of output items
`outputs[].url`	string	URL of the generated artifact
`outputs[].content_type`	string	MIME type (e.g. image/png, video/mp4)
`error`	object \| null	Error details if failed, null on success
`error.type`	string	Machine-readable error type code
`error.message`	string	Human-readable error description

Async Workflow

This model uses asynchronous execution. Submit a request and poll for the result.

Submit — POST to /v1/run, receive an id
Poll — GET /v1/run/{id} until status is completed, failed, or timeout
Retrieve — Read outputs from the completed response

Code Examples

Ready-to-run snippets

# Step 1: Submit
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
  "model": "trellis/trellis-2",
  "image": "https://static.sandbase.ai/examples/trellis/trellis-2/input_image_0.png",
  "remesh": true,
  "resolution": 1024,
  "remesh_band": 1,
  "ss_rescale_t": 5,
  "texture_size": 2048,
  "remesh_project": 0,
  "decimation_target": 500000,
  "ss_sampling_steps": 12,
  "tex_slat_rescale_t": 3,
  "ss_guidance_rescale": 0.7,
  "shape_slat_rescale_t": 3,
  "ss_guidance_strength": 7.5,
  "tex_slat_sampling_steps": 12,
  "ss_guidance_interval_end": 1,
  "shape_slat_sampling_steps": 12,
  "tex_slat_guidance_rescale": 0,
  "uv_unwrap_smooth_strength": 1,
  "ss_guidance_interval_start": 0.6,
  "tex_slat_guidance_strength": 1,
  "shape_slat_guidance_rescale": 0.5,
  "uv_unwrap_global_iterations": 1,
  "uv_unwrap_refine_iterations": 0,
  "shape_slat_guidance_strength": 7.5,
  "uv_unwrap_angle_threshold_deg": 90,
  "tex_slat_guidance_interval_end": 0.9,
  "shape_slat_guidance_interval_end": 1,
  "tex_slat_guidance_interval_start": 0.6,
  "shape_slat_guidance_interval_start": 0.6,
  "prompt": "a beautiful sunset over mountains"
}'

# Step 2: Poll result (replace <id>)
curl https://api.sandbase.ai/v1/run/<id> \
  -H "Authorization: Bearer YOUR_API_KEY"

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