Extensible 3D compressed binary encoding MIME Type
model/x3d+binary identifies, how Extensible 3D compressed binary encoding files are encoded, and how Poly supports them. MIME type details for model/x3d+binary
In active use| MIME type | model/x3d+binary |
|---|---|
| Extensions | .x3db |
| First standardized | Unknown |
| Created by | Web3D Consortium and ISO/IEC |
| Browser support | |
| Example applications | Xj3D, InstantReality |
| Poly support | Storage Only. Poly recognizes this media type but does not currently import binary X3D for 3D previews. |
| Indexed by Poly | Yes. Poly indexes filenames and basic file metadata. |
| Preview in Poly | No. Binary X3D is recognized but is not currently imported for Poly previews. |
| Poly agent | No. Poly does not currently provide binary X3D scene content to the agent. |
What does model/x3d+binary mean?
X3DB is X3D's compressed binary encoding. Web3D describes conversion from a canonical X3D representation into a compressed binary stream and defines .x3db with model/x3d+binary.1 It is a separate representation from XML X3D, so renaming the suffix does not convert the file.
The associated extensions are .x3db. The media type identifies the format family; it does not convert bytes or guarantee that a reader supports every entity.
Poly support
Poly recognizes this type as stored binary X3D and indexes filenames and basic file metadata. It does not currently import binary X3D for a 3D preview or agent interaction.
| Construct | What to expect |
|---|---|
| Geometry and scene structure | Available when import succeeds. |
| Materials and textures | Depends on source constructs and supported rendition features. |
| Lighting, cameras, and animation | Available when present and supported. |
The identifier is recognized, but binary X3D is not currently imported for Poly previews.
Opening and conversion
Use a format-aware application when preserving editability matters. Conversion to glTF or OBJ can improve interchange for 3D viewing, while CAD and BIM workflows should retain the original schema and exchange context.