IFC for Revit 2015 (v15.7):
IFC for Revit 2016 (v16.4):
New Export Functionality:
– Append “(Type)” to all internal Revit type property sets, to avoid having multiple property sets with the same name assigned to the same IFC entity.
– Changed how the classification code is parsed so that classifications can have brackets and colons in them.
– “Extra Low” level of detail now applies to all faceted BRep geometry, allowing many more files to export without hitting the size limit.
– If a user–defined property set contains the same property name more than once, take the last non–empty value (don’t duplicate the property name).
– Rebar elements can generate up to 1024 consistent GUIDs for individual IfcReinforcementBars, up from 256.
– (IFC4) Zones can now have a long name, set by the “ZoneLongName” shared parameter for non–MEP zones, and the “IfcLongName” parameter for MEP zones.
Export Bug Fixes:
– Don’t create orphaned IfcStyledItems.
– Don’t export invisible geometry in beams.
– Export DirectShapes of Walls category.
– Export elements with empty custom classification field values.
– Floors exported as IfcSlabs correctly report if they are load bearing or not, using either the “LoadBearing” shared parameter or the Structural built–in parameter, in that order.
– Improve performance in certain cases where we can’t create a valid tessellation for a face.
– The “Use active view to generate geometry” option now works correctly.
– (IFC4) Correct the orientation of some IfcAdvancedBRep faces.
New Import Functionality:
– Import IfcProxy as Generic Models.
Import Bug Fixes:
– Fix how the IFC GUID is set for certain elements.
– Fix the orientation of some imported objects where part of the local placement needs to be calculated.
– (IFC4) Read in some missing relations caused by “IsDefinedBy” split into 3 inverse attributes.