How to Convert FBX to glTF in Python

Problem

Developers need to convert FBX 3D model files to the glTF or GLB format for use in web viewers, game engines, and modern rendering pipelines. Aspose.3D handles this with Scene.from_file() to load the FBX file and scene.save() to write the glTF output.

Note on FBX support: Aspose.3D FOSS has limited FBX support. Loading basic geometry (meshes and node hierarchy) from FBX files works in most cases, but complex animation, skinning, and proprietary FBX features may not be preserved. Converting the loaded geometry to glTF or GLB is well-supported.

Prerequisites

• Python 3.7 or later
• Install via pip: pip install aspose-3d-foss

from aspose.threed import Scene, FileFormat

Conversion Steps

Step 1: Load the FBX File

Use Scene.from_file() to load the FBX file. The format is detected automatically from the .fbx extension.

from aspose.threed import Scene

scene = Scene.from_file("input.fbx")

Step 2: Save to glTF Binary (GLB)

Call scene.save() with FileFormat.GLTF2_BINARY to write the output as a compact binary glTF file. This is the recommended output format: single-file, compact, and broadly compatible.

from aspose.threed import FileFormat

scene.save("output.glb", FileFormat.GLTF2_BINARY)

To save as JSON glTF instead:

scene.save("output.gltf", FileFormat.GLTF2)

Step 3: (Optional) Use GltfSaveOptions

For more control over the glTF output, pass a GltfSaveOptions object:

from aspose.threed.formats import GltfSaveOptions

opts = GltfSaveOptions()
opts.binary_mode = True
scene.save("output.glb", opts)

Code Example

Complete FBX-to-GLB conversion in three lines:

from aspose.threed import Scene, FileFormat

scene = Scene.from_file("input.fbx")
scene.save("output.glb", FileFormat.GLTF2_BINARY)

print("Conversion complete: input.fbx -> output.glb")

Supported Output Formats

When converting from FBX, the following output formats work reliably:

See Also

• How to Convert 3D Models with Aspose.3D
• Aspose.3D FAQ
• Load Files with Aspose.3D
• Render 3D Models with Aspose.3D