Trellis 2

POST/v1/run

Trellis 2 is trellis's image-to-3D AI model. Transform photographs into production-ready 3D meshes with accurate geometry and texture mapping.

Request body

Submit an async generation request. The model field selects the model; other fields are model-specific input parameters.

stringmodelrequired

Model identifier. Set to trellis/trellis-2.

Default: trellis/trellis-2

stringimagerequired

URL of the input image to convert to 3D

Optional<integer>resolution

Output resolution; higher is slower but more detailed

Allowed values: 512, 1024, 1536

Default: 1024

Optional<number>shape_slat_guidance_rescale

Dampens artifacts from high guidance in the shape stage. Increase if you see noisy geometry.

Range: 0 to 1

Default: 0.5

Optional<number>uv_unwrap_angle_threshold_deg

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.

Range: 0 to 180

Default: 90

Optional<integer>uv_unwrap_refine_iterations

Number of local refinement passes during UV chart computation. Higher values produce cleaner chart boundaries at the cost of additional UV-unwrap time.

Range: 0 to 10

Default: 0

Optional<number>shape_slat_guidance_strength

How closely the detailed geometry follows the input image. Higher values add more detail but may introduce noise.

Range: 0 to 10

Default: 7.5

Optional<number>tex_slat_rescale_t

Controls noise schedule sharpness for texture generation. Higher values produce sharper texture details.

Range: 1 to 6

Default: 3

Optional<number>tex_slat_guidance_interval_start

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.

Range: 0 to 1

Default: 0.6

Optional<integer>shape_slat_sampling_steps

Number of denoising steps for shape refinement. More steps = slower but potentially smoother geometry.

Range: 1 to 50

Default: 12

Optional<integer>decimation_target

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.

Range: 5000 to 2000000

Default: 500000

Optional<integer>texture_size

Resolution of the texture image baked onto the mesh. Higher values capture finer surface details but produce larger files.

Allowed values: 1024, 2048, 4096

Default: 2048

Optional<number>ss_guidance_rescale

Dampens artifacts from high guidance in stage 1. Lower values allow stronger guidance effects, higher values stabilize the output.

Range: 0 to 1

Default: 0.7

Optional<integer>ss_sampling_steps

Number of denoising steps for the initial structure. More steps = slower but potentially higher quality.

Range: 1 to 50

Default: 12

Optional<number>tex_slat_guidance_interval_end

Fraction of the denoising process at which classifier-free guidance ends for stage 3 (texture). Must be >= tex_slat_guidance_interval_start.

Range: 0 to 1

Default: 0.9

Optional<integer>uv_unwrap_global_iterations

Number of global clustering passes during UV chart computation. More passes produce more balanced charts.

Range: 1 to 10

Default: 1

Optional<number>remesh_band

Controls how far remeshing can move vertices from the original surface. Higher values allow more smoothing but may lose fine details.

Range: 0 to 4

Default: 1

Optional<number>shape_slat_rescale_t

Controls noise schedule sharpness for shape refinement. Higher values produce sharper geometric details.

Range: 1 to 6

Default: 3

Optional<number>uv_unwrap_smooth_strength

Smoothing strength applied to UV chart boundaries. Higher values reduce visible seams but may introduce UV distortion.

Range: 0 to 10

Default: 1

Optional<number>remesh_project

How much to project remeshed vertices back onto the original surface. 0 = no projection (smoother), 1 = full projection (preserves detail).

Range: 0 to 1

Default: 0

Optional<number>ss_guidance_strength

How closely the initial 3D structure follows the input image. Higher values produce more faithful but potentially noisier results.

Range: 0 to 10

Default: 7.5

Optional<number>ss_guidance_interval_end

Fraction of the denoising process at which classifier-free guidance ends for stage 1 (sparse structure). Must be >= ss_guidance_interval_start.

Range: 0 to 1

Default: 1

Optional<number>tex_slat_guidance_strength

How closely the texture follows the input image colors. Higher values produce more vivid but potentially oversaturated textures.

Range: 0 to 10

Default: 1

Optional<integer>tex_slat_sampling_steps

Number of denoising steps for texture generation. More steps = slower but potentially cleaner textures.

Range: 1 to 50

Default: 12

Optional<number>shape_slat_guidance_interval_end

Fraction of the denoising process at which classifier-free guidance ends for stage 2 (shape refinement). Must be >= shape_slat_guidance_interval_start.

Range: 0 to 1

Default: 1

Optional<number>ss_guidance_interval_start

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.

Range: 0 to 1

Default: 0.6

Optional<number>shape_slat_guidance_interval_start

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.

Range: 0 to 1

Default: 0.6

Optional<number>ss_rescale_t

Controls noise schedule sharpness for structure generation. Higher values produce sharper transitions.

Range: 1 to 6

Default: 5

Optional<number>tex_slat_guidance_rescale

Dampens artifacts from high guidance in the texture stage. Increase if textures look noisy or have color banding.

Range: 0 to 1

Default: 0

Optional<boolean>remesh

Rebuild the mesh topology for cleaner triangles. Slower but usually produces better results for downstream use (animation, 3D printing, etc).

Default: true

Optional<integer>seed

Random seed for reproducibility

Response Schema

The submit endpoint returns a run response. If its status is pending or running, poll GET /v1/run/{id} with the returned opaque ID until it reaches a terminal state.

stringidrequired

Opaque SandBase run identifier. Use it exactly as returned; no prefix is guaranteed.

stringstatusrequired

Current public run status.

Allowed values: pending, running, completed, failed, timeout

Optional<string>model

Public SandBase model name used for this run.

Optional<array<object>>outputs

Present only for completed runs. Each object is capability-specific; inspect the selected model schema for its fields.

Optional<object>error

Present only for failed or timeout runs. Contains a public error type and sanitized message.

Optional<string>error.type

Stable public error category.

Optional<string>error.message

Sanitized error message safe to show to clients.

Optional<object>usage

Usage details when available.

Model capabilities

array<string>capability_tagsrequired

Capabilities declared by the model registry.

Default: image-to-3d

stringexecution_moderequired

Execution mode declared by the model registry.

Default: async

# 1. Submit a generation request
curl -X POST https://api.sandbase.ai/v1/run \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "trellis/trellis-2",
  "image": "https://static.sandbase.ai/examples/trellis/trellis-2/input_image_0.png"
}'

# 2. If the response is still running, poll the returned id
curl https://api.sandbase.ai/v1/run/f3d2e8a1-7c4b-4a12-9d2e-123456789abc \
  -H "Authorization: Bearer $SANDBASE_API_KEY"

Response202 Accepted

{
  "id": "f3d2e8a1-7c4b-4a12-9d2e-123456789abc",
  "model": "trellis/trellis-2",
  "status": "running"
}