I’m trying to modify a model based on a part of my home town (Montreal) for a 3D printing project but I’m having a hard time doing that because the file is big (145Mb) even if I reduced the whole model size from 64km2 to only 6cm x 6cm. I tried cleaning-up and fixing without any notable file size reduction. The model was generated using https://cadmapper.com/ and saved in .skp
With that file size it’s almost impossible to do anything without Sketchup freezing all the time and for very long.
Is there a quick fix to this issue?