Tridi Viewer

IGES, IGS, and BREP Viewer for Windows

Open IGES, IGS, and BREP CAD files on Windows, inspect tessellated geometry, hierarchy, colors, dimensions, and native CAD edges.

Applies to Tridi Viewer 1.1.3 public beta. Check current format support.

Inspect IGES and BREP CAD geometry

Tridi Viewer opens .iges, .igs, and .brep files on Windows and tessellates supported CAD shapes for real-time viewing. Native CAD edge topology remains available for solid-wireframe inspection.

IGES is a neutral exchange format used by many established CAD workflows, while BREP files preserve boundary-representation shapes used by Open CASCADE Technology. Both describe geometry differently from a polygon-only mesh, so Tridi Viewer creates display triangles while retaining available topological edges for inspection.

Common IGES and BREP viewing use cases

  • Review a supplier or customer CAD handoff without modifying the source model.
  • Check overall dimensions, orientation, hierarchy, object names, and available colors.
  • Inspect face boundaries and native CAD edges for gaps or unexpected part segmentation.
  • Preview a legacy IGES file before deciding whether it needs repair or conversion in a CAD system.

Supported IGES and BREP data

  • Tessellated geometry, hierarchy, and transforms.
  • Available object names and colors.
  • Native B-rep edge topology for Solid Wireframe inspection.
  • Dimensions, object selection, viewport navigation, and render controls.

How CAD inspection differs from mesh viewing

The shaded surface is a tessellated representation generated for the viewport. Increasing tessellation quality can make curved faces look smoother, but it also creates more display geometry and can increase load time and memory use. Solid Wireframe uses available native curve topology instead of merely drawing every display triangle, which is more useful for understanding CAD face boundaries.

Dimensions describe the imported scene or current selection. They are useful for a quick scale check, but Tridi Viewer does not evaluate drawing tolerances, geometric dimensioning and tolerancing, manufacturing annotations, watertightness, or CAD-kernel validity.

Viewing, not parametric CAD editing

IGES and BREP support is intended for inspection. Tridi Viewer does not expose feature history, parametric editing, textures, UVs, skinning, or animation from CAD files. Malformed or unsupported CAD entities can prevent import, and a successful visual preview does not certify the source shape for manufacturing.

Format references: NIST publishes the IGES specification record, and Open CASCADE documents its BREP format.

Open the file in Tridi Viewer

Install the public beta from Microsoft Store on a supported x64 Windows PC.

Download for Windows
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