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OCCT conversion workflows

glTF / GLB to USD / USDZ

Convert glTF or GLB scenes to USD, USDZ or USDA. Map supported meshes, hierarchy and appearance through an OCCT3D scene exchange workflow.

Build this conversion into your application with OCCT readers, writers and the commercial components identified below.

Ask about this workflow
Input interface
OCCT glTF reader
Processing route
Mesh to mesh
Output interface
OCCT3D USD writer

Connect glTF assets to a USD pipeline

A glTF-to-USD workflow combines an OCCT glTF reader with the USD exchange component. GLB input is part of the glTF family; the USD writer supports USD, USDZ and USDA output. The integration moves supported mesh and scene data through an application representation.

This route is useful when a delivered visualization asset needs to participate in another scene-authoring or collaboration system. It starts from polygonal scene content, so CAD surface reconstruction is not a prerequisite.

Define the scene properties to map

Identify the hierarchy, node names, placements, colors and material information required by the receiver. The USD component can write meshes, primitives, metadata, materials and animations, but the complete conversion is limited by what the source reader exposes and what the application retains.

In particular, USD animation support does not by itself establish that every glTF animation or extension is imported by this route. Evaluate those properties explicitly with source scenes that contain them. Application-authored metadata can be added separately when the pipeline has the necessary records.

Check the scene in its destination

Compare model scale, orientation, node organization and appearance after reopening the chosen USD variant. Review associated resources and the target application’s interpretation of materials.

A useful acceptance set includes multiple objects, repeated placements and the appearance combinations used by the product. Document any mapping or omitted properties so downstream users know what the converted scene contains. For the opposite direction, see USD to glTF.

Conversion integration

Build a glTF / GLB to USD / USDZ workflow

Share the source and receiving applications, representative files, required attributes and throughput. We can scope SDK evaluation or an integrated conversion service.