> Is there such possibility in Moi3D to export/save as .obj or something like that?

No, not currently. But it is very high on the priority list so it won't be long before this is added. I'm hoping to get it done sometime next week.

Until then you have to use some other software that can read a Rhino .3dm file and convert it - such as Rhino, PolyTrans, Deep Exploration, ...

- Michael