Hi Marc, you might be interested in trying out Rhino for that as well (http://rhino3d.com/) , it has a command named "Make2D", which will generate a hidden-line 2D curve vector image of a 3D solid model.

You actually should be able to bring .3dm files you create in MoI directly into Rhino for that type of processing.

That might be another useful tool for you in this kind of processing.

- Michael