Metadata Extraction from 3D assets
The Unity Asset Manager automatically extracts model metadata from your 3D assets to help you filter and identify your assets more effectively.
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When you upload a supported 3D model, the Unity Asset Manager automatically reads and extracts its metadata. You can't edit these metadata fields, but you can use them to filter assets and create smart views.
The following table lists the metadata fields extracted automatically from your 3D assets:
Metadata Field Name | Description | Examples |
|---|---|---|
| Triangle count | Number of triangles (polygons) | 34,180 |
| Vertex count | Number of vertices | 17,643 |
| Vertex to Tri ratio | Ratio between the number of vertices and the number of triangles | 0.516 |
| Material count | Number of materials | 5 |
| Material names | List of all existing material names | Material #954, Material #958, Material #956, 09___Default Material #954 |
| Texture count | Number of textures | 1 |
| Texture names | List of all existing texture names | xm_map |
| Max texture size | The maximum texture size among all textures used by the model | 4,096 |
| Part count | Number of separate objects in the model | 11 |
| Is Rigged | Indicates if the mesh comes with a rig | True |
| Has Animation | Indicates if the mesh comes with animations | True |
| Closed | Indicates if the mesh is a closed mesh or an insert mesh | False |
| Has Vertex Colors | Indicates if the object has vertex color data | False |
| Has UV | Indicates if the file has UV mapping | True |
| Max UV channel | If the file contains multiple UV channels, returns the maximum UV channel | 0 |
| Light count | Number of lights within the model (only supported for glb, gltf, and usd, otherwise, it will return 0) | 0 |
| Bounding box size | The size of the diagonal bounding box in mm | 4,403,939.73 |
| Position (XYZ coordinates of the asset origin) | Position of the object's origin in relation to the world origin | -21003.26, 1383348.03, -262979.96 |
| Has Brep | Indicates if the file contains BREP (native CAD representation) | False |
| Has Mesh | Indicates if the file contains mesh (RT3D representation) | True |
| Has Points | Indicates if the file contains points or point clouds | False |
How to extract metadata from 3D Models
Using the API
Trigger the metadata extraction pipeline using the endpoint with the metadata-extraction pipeline.
StartTransformationUsing the Unity Asset Manager web interface
To extract metadata from your 3D asset with multiple files:
- Select the 3D asset you want to generate previews for. A side panel appears.
- On the top right corner, select Edit.
- Go to the Files tab.
- Select the More (...) menu on a supported file format.
- Select Extract metadata. The scene metadata is extracted.
注意
Asset Manager automatically extracts metadata for any 3D asset upload containing a single 3D file.