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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.
glTF 2.0 at a glance
glTF 2.0
glTF emerged from Khronos as a web and engine-friendly counterpart to heavier exchange formats, and version 2.0 became the point where physically based materials and richer runtime interoperability made it a common default for modern 3D delivery.
Format comparison
| Feature | BREP | glTF 2.0 |
|---|---|---|
| File type | Cad | Cad |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | precise | precise |
| File size characteristics | depends | depends |
| Compatibility | limited | limited |
| Editability | high | high |
| Created year | 1996 | 2017 |
| Inventor | Open CASCADE Technology | Khronos Group |
| Status | active | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | rich | rich |
| Delivery profile | limited | limited |
| Workflow fit | design | design |
| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Supported |
| Structured data | Not supported | Supported |
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 glTF 2.0
- design authoring
- review handoff
- manufacturing exchange
- Designed for efficient runtime loading rather than only archival exchange.
FAQs
Why convert BREP to glTF 2.0?
Choose glTF 2.0 as target when 3D asset delivery for web, AR/VR, and game engines; cross-platform 3D content pipelines requiring efficient streaming and broad toolchain support.
What changes when converting BREP to glTF 2.0?
3D asset delivery for web, AR/VR, and game engines; cross-platform 3D content pipelines requiring efficient streaming and broad toolchain support.
What should I review after converting BREP to glTF 2.0?
After conversion, review these destination checks: Open converted output in Blender exporters and verify behavior on real samples; Compare output against the expected precise quality profile; Not intended to preserve every authoring-system construct found in richer DCC project files.
How can I keep quality stable in BREP to glTF 2.0 conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Binary efficiency and runtime scope can require extensions for domain-specific needs; Not intended to preserve every authoring-system construct found in richer DCC project files; Validate destination compatibility before large-batch conversion.