Supported File Formats
F3D supports the following file formats:
| Name | File Extension(s) | Full scene | Animation Support | Plugin | Reader Name |
|---|---|---|---|---|---|
| Legacy VTK | .vtk | No | NONE | native | VTKLegacy |
| VTK XML | .vtp, .vtu, .vtr, .vti, .vts, .vtm | No | NONE | native | VTKXMLVT<P,U,R,I,S,M> |
| VTKHDF | .vtkhdf | No | UNIQUE | hdf | VTKHDF |
| EXODUS II | .e, .ex2, .exo, .g | No | UNIQUE | hdf | ExodusII |
| NetCDF | .nc, .cdf, .ncdf | No | UNIQUE | hdf | NetCDF |
| Polygon File Format | .ply | No | NONE | native | PLYReader |
| Standard Triangle Language | .stl | No | NONE | native | STL |
| DICOM | .dcm | No | NONE | native | DICOM |
| NRRD (“nearly raw raster data”) | .nrrd, .nhdr | No | NONE | native | Nrrd |
| MetaHeader MetaIO | .mhd, .mha | No | NONE | native | MetaImage |
| Tag Image File Format 2D/3D | .tif, .tiff | No | NONE | native | TIFF |
| QuakeMDL | .mdl | Yes | SINGLE | native | QuakeMDL |
| CityGML | .gml | No | NONE | native | CityGML |
| Point Cloud | .pts | No | NONE | native | PTS |
| Standard for the Exchange of Product Data | .step, .stp, .stpnc, .p21, .210 | No | NONE | occt | STEP |
| Initial Graphics Exchange Specification | .iges, .igs | No | NONE | occt | IGES |
| Open CASCADE Technology BRep format | .brep | No | NONE | occt | BREP |
| Open CASCADE Technology XBF format | .xbf | No | NONE | occt | XBF |
| Alembic | .abc | No | UNIQUE | alembic | Alembic |
| Wavefront OBJ | .obj | Yes | NONE | native | OBJ |
| GL Transmission Format | .gltf, .glb | Yes | MULTI | native | GLTF, GLTFDraco |
| Draco | .drc | No | NONE | draco | Draco |
| Autodesk 3D Studio | .3ds | Yes | NONE | native | 3DS |
| Virtual Reality Modeling Language | .wrl, .vrml | Yes | NONE | native | VRMLReader |
| Autodesk Filmbox | .fbx | Yes | SINGLE | assimp | FBX |
| COLLADA | .dae | Yes | SINGLE | assimp | COLLADA |
| Object File Format | .off | Yes | NONE | assimp | OFF |
| Drawing Exchange Format | .dxf | Yes | NONE | assimp | DXF |
| DirectX | .x | Yes | SINGLE | assimp | DirectX |
| 3D Manufacturing Format | .3mf | Yes | NONE | assimp | 3MF |
| Universal Scene Description | .usd, .usda, .usdc, .usdz | Yes | SINGLE | usd | USD |
| VDB | .vdb | No | NONE | vdb | VDB |
| 3D Gaussian splatting | .splat | No | NONE | native | Splat |
| Compressed 3D Gaussian splatting | .spz | No | NONE | native | SPZ |
Reader options
Readers can provide option that can be set using the -D/--define command line option. eg: -DVDB.downsampling_factor=0.5.
For booleans, 0 means false, not 0 means true. Unsigned int will interpret anything that is not a non-negative integer as the default value.
| File extension | Option Name | Argument Type | Description |
|---|---|---|---|
vdb | VDB.downsampling_factor | double | Control the level of downsampling when reading a volume, default is 0.1. |
occt | STEP.linear_deflection | double | Control the distance between a curve and the resulting tessellation, default is 0.1. |
occt | STEP.angular_deflection | double | Control the angle between two subsequent segments, default is 0.5. |
occt | STEP.relative_deflection | bool | Control if the deflection values are relative to object size, default is false. |
occt | STEP.read_wire | bool | Control if lines should be read, default is true. |
occt | IGES.linear_deflection | double | Control the distance between a curve and the resulting tessellation, default is 0.1. |
occt | IGES.angular_deflection | double | Control the angle between two subsequent segments, default is 0.5. |
occt | IGES.relative_deflection | bool | Control if the deflection values are relative to object size, default is false. |
occt | IGES.read_wire | bool | Control if lines should be read, default is true. |
occt | BREP.linear_deflection | double | Control the distance between a curve and the resulting tessellation, default is 0.1. |
occt | BREP.angular_deflection | double | Control the angle between two subsequent segments, default is 0.5. |
occt | BREP.relative_deflection | bool | Control if the deflection values are relative to object size, default is false. |
occt | BREP.read_wire | bool | Control if lines should be read, default is true. |
occt | XBF.linear_deflection | double | Control the distance between a curve and the resulting tessellation, default is 0.1. |
occt | XBF.angular_deflection | double | Control the angle between two subsequent segments, default is 0.5. |
occt | XBF.relative_deflection | bool | Control if the deflection values are relative to object size, default is false. |
occt | XBF.read_wire | bool | Control if lines should be read, default is true. |
mdl | QuakeMDL.skin_index | unsigned int | Select a particular skin from a mdl file. Uses 0-indexing, default is 0. |
Format details
QuakeMDL
- Models texture are loaded with a simple PBR lighting (diffuse color only, no specular, index of refraction set to 1.0).
- Selecting
skinis not supported. - Loading
groupskinis not supported. - Animation frames are split based on their names, eg:
stand1,stand2,stand3,run1,run2,run3.
3D Gaussian splatting
Currently, 3 different formats are supported by F3D:
.ply: Original 3DGS format.splat: Format specified by https://github.com/antimatter15/splat. Does not support spherical harmonics..spz: Niantic’s format specified by https://github.com/nianticlabs/spz
Note that no config files come with the .ply format because this format isn’t dedicated to 3DGS only so we cannot generalize. If you are using .ply for 3DGS only, you can set up a config file similar to what is done for .splat or .spz. See configuration file documentation