I have a model of a small aerofoil section blade for an experimental rig and I am trying to make a drawing from this. The blade model is as in the image below. The loft which forms the actual blade is not visible when the blade is imported into a drawing. I have played around with the various different tanget edge visibility settings but the edges of the loft are still not visible. The drawing that results shows that both the start and end curves of the loft are visible but that the body is not. Does anybody know what might be causing this?