IFC Import Settings

• None - do not performy any additional checks for duplicates. Elements, shread in IFC file may be instanced.
• Geometry - only meshes may be merged.
• Everyting - Check for parts of scene for duplications.

During this operation metadata may be lost, since products with same geometry representation may have different metadata.
Check for duplicated geometry requires some time, but since geometry processing is not an easy task, especially for opening elements, time till appearing first 3d object on the screen is less.