I'm having problems importing a public source file containing 3D buildings in The Netherlands into our 3D BIM software ArchiCAD. The website (https://3dbag.nl/en/viewer) offers 3 types of files, including OBJ-files. The proposed workaround is to import the OBJ-file into Blender and export a Collada file for use in ArchiCAD. However, when I open the Collada (.dae) file in ArchiCAD the geometry is all messed up and doesn't look like the preview in the website's viewer anymore. Is there a way to import the OBJ-file into Blender and retain the exact geometry that should be in the file?
Another method we have tried is using the CityJSON-file and importing/exporting through QGIS, but that resulted in a non-solid wireframe. This wireframe did have the correct geometry though...
Another method was using a plugin called Modelport which imports OBJ-files directly into ArchiCAD. This works, using the same OBJ-file, and gives the correct geometry. However, this plugin is not open source and costs quiete a bit.
The above trials show that the correct and accurate geometry IS included in the OBJ-file but somehow gets distorted while importing into Blender. I know the software is called Blender but I would expect it to be possible to import a 3D file 'unblended'.
If anyone has any idea how to fix this it would be very much appreciated!
The file I'm currently looking for is this one: https://3dbag.nl/en/download?tid=1024
Below are screenshots of the 3D buildings in the online viewer on the left, and the final 3D model imported into ArchiCAD (through Blender) on the right.