Hi Eugenio,

> Is it possible that next version of MOI will solve this problem?

Sorry no, that's not possible - it's something that would need to be addressed by Simlab Composer. They would need to process the real NURBS objects that MoI saves in the 3DM file instead of only looking for Rhino's cached display mesh information. See here for a more detailed description:
http://moi3d.com/forum/index.php?webtag=MOI&msg=5325.2

I'd recommend using OBJ format with the "Output: Quads & Triangles" option for exporting to Simlab Composer, that works well for transferring rendering data over to it.

- Michael