تعليق رسمي
If the OBJ isn't working in Sketchup, you could open is using MeshLab and save it as another file format that will work with Sketchup. If you don't need the full model resolution the KMZ file will work in Sketchup.
We recommend Blender as a good free 3D modeling software.
We will leave this open for a bit to see what other feedback you can get.