model_urlstringrequired
URL of the GLB or OBJ model to retopologize. Max 200MB.
Hunyuan 3D 3.1 Smart Topology
tencent/hunyuan-3d/3.1/smart-topologyHunyuan 3D 3.1 Smart Topology by Tencent retopologizes a GLB or OBJ model into a clean triangle or quad mesh at a chosen polygon density.
Try the model
Playground
Input
URL of the GLB or OBJ model to retopologize. Max 200MB.
Advanced settings
Format of the input model. Allowed values: glb, obj.
triangle: triangles only. quadrilateral: mixed quads and triangles. Allowed values: triangle, quadrilateral.
Target polygon density: high keeps more detail, low gives fewer polygons. Allowed values: high, medium, low.
ResultIdle
Your output will appear here
Complete the inputs, then click Run.
Hunyuan 3D 3.1 Smart Topology
Hunyuan 3D 3.1 Smart Topology by Tencent retopologizes a GLB or OBJ model into a clean triangle or quad mesh at a chosen polygon density.
Fields
| Field | Type | Default | Notes |
|---|---|---|---|
model_url | string, required | — | URL of the GLB or OBJ model to retopologize. Max 200MB. |
input_file_type | glb / obj | glb | Format of the input model. |
polygon_type | triangle / quadrilateral | triangle | triangle: triangles only. quadrilateral: mixed quads and triangles. |
face_level | high / medium / low | medium | Target polygon density: high keeps more detail, low gives fewer polygons. |
Output
url: Main 3D file (GLB unless another export format is selected).
Billing
$0.75 per request. Failed runs are not charged.
Also on SandBase
Other Tencent 3D endpoints: tencent/hunyuan-3d/3.0/image-to-3d, tencent/hunyuan-3d/3.1/part, tencent/hunyuan-3d/3.1/pro/image-to-3d, tencent/hunyuan-3d/3.1/pro/text-to-3d.
Start building
Send your first request
Submit this model through the SandBase Unified Run API.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/run" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "tencent/hunyuan-3d/3.1/smart-topology",
"model_url": "https://static.sandbase.ai/examples/tencent/hunyuan-3d/3.1/smart-topology/input_input_file_url_0.glb",
"face_level": "medium",
"polygon_type": "triangle",
"input_file_type": "glb"
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
status=$(printf '%s' "$result" | jq -r .status)
case "$status" in completed|failed|timeout) break ;; esac
sleep 2
result=$(curl --fail-with-body --silent \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
"https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"2. Authentication
Create a SandBase API key and set it in your server environment. All requests use Bearer authentication.
export SANDBASE_API_KEY="YOUR_API_KEY"Keep the key on your server. Do not expose it in browser code or commit it to a repository.
3. Queue
Submit a request
POST to /v1/run with this model ID and its inputs. The request example above includes submission and polling.
Fetch request status and result
Use the returned run ID to poll until the status is completed, failed or timeout. Read output only after completed.
curl "https://api.sandbase.ai/v1/run/$RUN_ID" \
-H "Authorization: Bearer $SANDBASE_API_KEY"4. Files
Hosted files
Pass a publicly accessible file URL in the model’s image, video or audio field. Supported formats and limits are shown beside each Playground input.
Uploading images
Use the upload or replace control on supported image fields in the Playground. Video URL fields accept a hosted driving video; they do not imply video-upload support.
5. Schema
Input
face_levelstring
Target polygon density: high keeps more detail, low gives fewer polygons.
Default: "medium"
Possible values: "high", "medium", "low"
polygon_typestring
triangle: triangles only. quadrilateral: mixed quads and triangles.
Default: "triangle"
Possible values: "triangle", "quadrilateral"
input_file_typestring
Format of the input model.
Default: "glb"
Possible values: "glb", "obj"
{
"model": "tencent/hunyuan-3d/3.1/smart-topology",
"model_url": "https://static.sandbase.ai/examples/tencent/hunyuan-3d/3.1/smart-topology/input_input_file_url_0.glb",
"face_level": "medium",
"polygon_type": "triangle",
"input_file_type": "glb"
}Output
A completed run exposes its result in output. The following is the model’s saved example, not a new generation.
No example output has been published yet. Use Playground → Result → JSON after a completed run to inspect your response.