The optical ray traces I import from optical design software into my SW assemblies come in as 3D sketches. The 3D sketches are visible through the parts at all orientations. I would like to hide (make not visible) the portions of the 3D Sketch lines that pass (out of sight) behind parts. Is there a way to make parts not transparent to 3D sketches in an assembly? Seems like I remember early versions of SW doing this automatically.