Hi ZBW, I'm sorry but I don't understand your question.

In the sub-d modeling program the model is made out of smaller elements, each one a quad polygon.

It is not efficient to have a CAD model with a large number of separate little elements like that, to work as a CAD model larger surface patches are formed by combining the small quads together.

A result of that combining is there will be a smaller number of edges in the converted result, instead of edges around each small quad polygon element, there will be edges only around the larger combined patches.

This is all a normal and intended way for the conversion to work.

- Michael