About model and data exchange with 3rd party solutions: Revit, Solibri, dRofus, Bluebeam, structural analysis solutions, and IFC, BCF and DXF/DWG-based exchange, etc.
Demicron has now a freeware version of VizUp, which features polygon reduction, albeit for VRML files... http://www.demicron.com/vizup/index.html (Windows only)
--- stefan boeykens --- bim-expert-architect-engineer-musician --- Archicad28/Revit2024/Rhino8/Solibri/Zoom MBP2023:14"M2MAX/Sequoia+Win11 Archicad-user since 1998 my Archicad Book