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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.
IFC at a glance
IFC
IFC grew out of the industry's need for open BIM interoperability so building projects would not be trapped inside a single authoring vendor's data model.
Format comparison
| Feature | BREP | IFC |
|---|---|---|
| File type | Not available | Not available |
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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 |
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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 IFC
- design authoring
- review handoff
- manufacturing exchange
- Strong role in open BIM interoperability.
FAQs
Why convert BREP to IFC?
Choose IFC as target when the target workflow needs BIM semantics, cross-vendor building-model exchange, or coordination between architecture, engineering, and construction systems.
What changes when converting BREP to IFC?
Convert to IFC when the target workflow needs BIM semantics, cross-vendor building-model exchange, or coordination between architecture, engineering, and construction systems. It is appropriate for design handoff, federated model review, and lifecycle building information exchange. Use IFC when structured building data matters more than lightweight visualization alone.
What should I review after converting BREP to IFC?
After conversion, review these destination checks: Open converted output in BIM tools and verify behavior on real samples; Compare output against the expected precise quality profile; Real-world interoperability still depends on how faithfully authoring tools map their internal models.
How can I keep quality stable in BREP to IFC conversion?
Run representative samples, keep settings deterministic, and monitor these risks: It is heavier and more semantically demanding than simple mesh interchange; Real-world interoperability still depends on how faithfully authoring tools map their internal models; Validate destination compatibility before large-batch conversion.