I am trying to export my Archicad model to 3Ds max using Collada.
However, it never comes to 3Ds with required scale.
My Archicad unit setting are all in millimeters > I save the model as .dae (no parameters of saving available) > I open 3Ds Max and set all units to millimeters > I import .dae file to Max and it says that the imported file is in centimeters > I select convert units to millimeters > File opened in 3Ds scaled 1:5 (in max the building is 2 meters high while its real height is 10m).
I did the same procedure having units in Archicad and 3Ds Max in meters but result is the same.
I can scale it up or down to the right size but it would mess up the textures.
I am not that familiar with the way Collada works (whether it has real world units, or just drawing units like AutoCAD), but I think you can rule out if it goes bad during import or export, if you open the DAE file in some kind of 3rd party Collada viewer application.