3D Conversion
CAD Data Conversion: Mesh vs BREP Explained
Understand the difference between mesh and BREP data in CAD conversion, why it matters for engineering workflows, and how to choose the right output format.
The difference between mesh and BREP
A mesh represents a 3D model using vertices, edges, and faces, usually triangles. It is excellent for visualization, 3D printing, game engines, web viewers, and fast geometric display. STL, OBJ, glTF, and many real-time formats are commonly mesh-oriented.
BREP, or boundary representation, stores analytic CAD surfaces, curves, topology, trims, and solid definitions. STEP, IGES, native CAD formats, and many manufacturing workflows depend on this richer representation because it supports precision editing, feature reconstruction, measurements, and downstream CAM or PLM processes.
Why conversion quality depends on the target workflow
A visually correct mesh may still be unsuitable for engineering edits if the receiving team needs true surfaces or solids. Likewise, a heavy BREP model may be unnecessary for a web viewer where performance and file size matter more than editable CAD topology.
The right conversion strategy should be selected by workflow: visualization, manufacturing, reverse engineering, QA comparison, data extraction, or archival. Each path has different expectations for accuracy, metadata, hierarchy, materials, and file size.
Where Cadster helps
Cadster Technologies builds CAD conversion pipelines, 3D viewers, mesh processing tools, and engineering data workflows. We help teams choose and implement conversion paths that preserve the information required by their real downstream process.
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