\\ Actually when you have n-gons in Modo the stuff getting rendered is something just like that "triangles only" export from MoI - Modo will keep an internal triangulation of the n-gon and it is the triangulation that will actually get shaded. N-gons are nice for other things like cleaner wireframe display, polygon selection and management type stuff, but they are not used directly for shading though.

Well actually that's something I don't really get. As I did a tons of test since few days, I actually get some case where, for the same object, the Ngone version is giving a much better result in Modo that the full triangulate one. Actually it's also visible in MoI viewport.



And you will of course see it in Modo, especially when using a reflective surface.



But that's extreme example of course.