Hi Jacobo - there are different possible normals for LWO format, either Modo type or LightWave type - have you possibly switched the option for that to LightWave?

Check in MoI under Options > Import/Export > LWO options > "Vertex normals style" - make sure it is set to "Vertex normals style: Modo".


Other than that, make sure you are "item mode" if you are doing any transforms on the imported object - I think if you're not in item mode and transform just vertices for example you can end up with the vertex normals staying in their initial position and getting out of sync with the geometry.


- Michael