IFC Geometry Issues

Diagnose and fix the five geometry fault classes that make an IFC model load blank, render garbled, sit in the wrong place, or get dropped on import : missing representation context, broken placement chains, malformed Brep, degenerate or duplicated geometry, and geometry that contradicts the declared Model View Definition (MVD).

A geometry fault is rarely a STEP syntax error. The file parses, the schema check often passes, yet the viewer shows nothing. The fault lives in the geometry graph : a representation with no context, a placement that resolves nowhere, a shell that is not closed.