Hi Mike,

> Why will Rhino open it and what for?

Well, Rhino is a quasi-dual mode program that can deal with both polygon mesh and NURBS geometry, although really most of it is focused mostly on the NURBS side of things.

So if you wanted to get mesh geometry into Rhino for whatever reason (possibly just as a kind of template guide to snap on to when reconstructing something), that would be a way to do it.

It's somewhat weird though because the mesh objects are basically a different category of objects in Rhino and don't usually directly interact with NURBS objects, there is a whole different set of commands for doing some mesh related stuff.

Usually it's better to take your mesh geometry into an actual polygon mesh editing focused program instead though.

What is your particular goal with trying to write data from Modo into MoI ?

- Michael