Hi Reggy, there is not currently any option for turning off writing out vertex normals to .obj or .lwo formats.

Using the vertex normals for shading is a key part for making renders work well, there are a lot of shading artifacts that you can get if you remove them.

Are you possibly doing some kind of transformation operation on objects after you have imported them? It sounds like you might be doing something that is not transforming the normals. If you're transforming objects try doing it in object edit mode instead of point edit mode.

- Michael