Customer want a better graphic support at anyCAD with AutoCAD Architecture DWG.
If you take a AutoCAD Architecture DWG underlay at Inventor, than you can't rendering the 3d Graphic elements.
for a rendering Model from AutoCAD Architecture user must take a "detour" over IFC or a Revit file.
Than you can import the model with rendering.
But than you have no associative updating at the AutoCAD Architecture file and you must create after Update the DWG a new File. It's not ease of use for customers.
See suport case: AnyCAD mit AutoCAD Architecture DWG - CaseNo:23453567