Hi PaQ,

re:
> Do you think it would be possible to write, as integer, the Nurbs surface id per polygons when exporting in .FBX ?

It sounds like you mean an ID value that would persist across different modeling sessions?

That doesn't seem like it would be feasible to fit in a single integer value.

Do you have any example FBX files that have this info set on them? Preferably something simple like a box.

The part IDs for LWO export work the same as smoothing groups that are currently written out to OBJ format.

- Michael