It appears MoI combines coplanar planes into single faces when I Loft (straight/exact) these polylines in a single operation (Orange Surface).

This breaks the ability to SubD the lofted surface using Max's SubD script.

If I Loft just a pair of polylines at a time, then join the resulting surfaces, I get the expected grid result and it will SubD (Red Surface).

Of course this is inefficient compared to selecting all the polylines at once and performing a single loft.

Is there a way to preserve individual faces in a Straight/Exact Loft from Polylines?

Sorry, no forum space left to post file.

Ed Ferguson