@Rich-O-Brien said in 3D terrain scanning/point cloud import:
3.6gb mesh is a lot to handle for many apps. But SketchUp is not meant to be a platform for such a use case.
I'd import that into Blender and try using either a Decimate or Remesh modifier to reduce the point count to get something usable in SketchUp.
You also may have many duplicate points in that mesh which would cause chaos in SketchUp so some cleaning would be needed in that area too.
I tried importing a 64,000kb monochrome .dae into Sketchup and that was completed within 30 seconds or so, but working with it was pretty much impossible. I tried running both a cleanup and converting triangular mesh to quad, but both failed.
I've previously imported a small 3D scan of a room complete with textures as a .glb from an ipad and that worked great, but anything beyond that is a world of pain.