@kwistenbiebel said:
Thanks for the reply Remus.
The thing is that when I apply subsmooth it generates a small group of just 4 triangles.
The rest of the model doesn't get subdivided at all....
This happens on occasion when you are doing a subD with 'copy materials' turned on. SketchUp will throw an error if it tries to create a face that is excessively small.
If you had the Ruby Console window turned on, you would see an error message about 'points not being co-planar'.
One workaround is to group the geometry according to material and avoid using 'copy materials'. Then, just apply the material to the 'group', not the individual faces.