Hello Michael,
this might be an interesting bit of information: The Lightwave exporter of Okino's PolyTrans offers the option to export vertex-normals in a "modo compliant way" as they call it. Here is how they describe it on the Okino website:
"Vertex Normals (Luxology MODO Compliant)
If this checkbox is enabled then vertex normals will be output to the .lwo object file. Vertex normals are needed to make an object appear smooth.
NOTE: at this time the Lightwave software does not have support for vertex normals in the .lwo file format; however, Luxology (developers of the MODO modeling program, and original developers of the Lightwave software) have implemented their own propietry "Vertex normals" chunk in the .lwo file. Okino has implemented this MODO compliant vertex normals chunk. The VMAP and VMAD type is "NORM" and the reference name is "vert_normals". Other software developers are free to add support for this added vertex normals IFF chunk in their Lightwave importers.
This option will be disabled when the Lightwave v5.6 file format version is selected."
( http://www.okino.com/conv/exp_lw.htm)
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