This build tool in Rhino is used very often by everyone, and it would be beneficial to have at least this feature in MoI along with the ability to export it. (It probably requires an additional bar density setting for this.)
I use that feature in Rhino for quick rendering as well, it works mostly OK but sometimes it gives some ugly artifacts, that's why for really good results I prefer the new fixed Fillet feature in MoI3D, either ACIS or Solid++.