I pay high respect @Moult for the great achievements with BlenderBIM.
As contribution for further developments I will spend some comments:
I am happy to report that minor issues that I discovered in the previous version of BlenderBIM disappeared in the new version. (little misalignment of window and openingelement inside wall)
Results (ifc testfile has been built by PostgreSQL PL/ pgSQL):
xBIM Xplorer:
Revit2020:
blender28-bim-191219-win:
I am a little bit concerned about dynamic performance.
50 storey tower (highly simplified) did not open in BlenderBIM, even after one hour.
other results:
xBIM Xplorer
Revit2020:
Best regards, Herb