i have a model of a floor plan that uses a sketch picture to show the outlines of the floor and walls.  when I export to 3-d pdf, the sketch picture is not shown.  the 2-d pdf exports do show the sketch picture.   I'm assuming that since a sketch only has 2-D content, that the 3-d pdf export just ignores it.   attempting to form a surface or extrusion from the sketch picture throws an error: "sketch has no contour geometry".  any ideas on how to get the sketch to export into the 3-d pdf?

thanks