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BREP at a glance
BREP
Boundary representation became a core idea in 1970s and 1980s solid modeling, and Open CASCADE's .brep files reflect that tradition by serializing exact topological and geometric entities for native CAD workflows.
GLB at a glance
GLB
glTF and GLB grew after earlier interchange formats proved too heavy for many web and runtime delivery tasks, which is why Khronos now positions glTF as a transmission/runtime format.
Format comparison
| Feature | BREP | GLB |
|---|---|---|
| File type | Not available | Not available |
| Extensions |
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| Compression / quality | Not available | Not available |
| File size characteristics | Not available | Not available |
| Compatibility | Not available | Not available |
| Editability | Not available | Not available |
| Created year | Not available | Not available |
| Inventor | Not available | Not available |
| Status | Not available | Not available |
| Transparency | Not available | Not available |
| Animation | Not available | Not available |
| Primary use cases |
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| Common software |
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| Archival suitability | Not available | Not available |
| Metadata handling | Not available | Not available |
| Delivery profile | Not available | Not available |
| Workflow fit | Not available | Not available |
| Layer support | Not available | Not available |
| Vector scaling | Not available | Not available |
| Structured data | Not available | Not available |
When to use each format
When to use BREP
- design authoring
- review handoff
- manufacturing exchange
- Preserves exact geometry and topology for solids, shells, faces, edges, and vertices.
When to use GLB
- design authoring
- review handoff
- manufacturing exchange
- Single-file packaging for glTF assets.
FAQs
Why convert BREP to GLB?
Choose GLB as target when you need a single-file 3D asset for web viewers, AR previews, real-time applications, product visualization, or engine import with minimal packaging friction.
What changes when converting BREP to GLB?
Convert to GLB when you need a single-file 3D asset for web viewers, AR previews, real-time applications, product visualization, or engine import with minimal packaging friction. It is often the best target for deployment-ready 3D delivery. Use GLB when compact transport and modern runtime compatibility matter more than human-readable source structure.
What should I review after converting BREP to GLB?
After conversion, review these destination checks: Open converted output in web 3D engines and verify behavior on real samples; Compare output against the expected precise quality profile; Not every authoring workflow keeps all rich edit semantics in GLB.
How can I keep quality stable in BREP to GLB conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Often used as a delivery target more than a master working format; Not every authoring workflow keeps all rich edit semantics in GLB; Validate destination compatibility before large-batch conversion.