Supported File Formats

F3D supports the following file formats:

Name File Extension(s) Full scene Animation Supported? Plugin
Legacy VTK .vtk No No native
VTK XML .vtp, .vtu, .vtr, .vti, .vts, .vtm No No native
VTKHDF .vtkhdf No Yes hdf
EXODUS II .e, .ex2, .exo, .g No Yes hdf
Polygon File Format .ply No No native
Standard Triangle Language .stl No No native
DICOM .dcm No No native
NRRD (“nearly raw raster data”) .nrrd, .nhrd No No native
MetaHeader MetaIO .mhd, .mha No No native
Tag Image File Format 2D/3D .tif, .tiff No No native
QuakeMDL .mdl Yes Yes native
CityGML .gml No No native
Point Cloud .pts No No native
Standard for the Exchange of Product Data .step, .stp No No occt
Initial Graphics Exchange Specification .iges, .igs No No occt
Open CASCADE Technology BRep format .brep No No native
Alembic .abc No Yes alembic
Wavefront OBJ .obj Yes Yes native
GL Transmission Format .gltf, .glb Yes Yes native
Autodesk 3D Studio .3ds Yes No native
Virtual Reality Modeling Language .wrl Yes No native
Autodesk Filmbox .fbx Yes Yes assimp
COLLADA .dae Yes Yes assimp
Object File Format .off Yes No assimp
Drawing Exchange Format .dxf Yes No assimp
DirectX .x Yes Yes assimp
3D Manufacturing Format .3mf Yes No assimp
Universal Scene Description .usd, .usda, .usdc, .usdz Yes Yes usd
VDB .vdb No No vdb
3D Gaussian splatting .splat No No native
Compressed 3D Gaussian splatting .spz No No native

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 skin is not supported.
  • Loading groupskin is not supported.
  • Animation frames are split based on their names, eg: stand1, stand2, stand3, run1, run2, run3.