Mimicking a Tunnel-Shaped Section Box?

Regular Section Boxes in Revit are cuboids, which is great except when trying to see a snaking run of elements as they go through a complicated building. I am looking for ideas of ways to get a run of something (e.g., Conduit), expand its geometry a few feet in all directions, and hide everything else in the view, including elements in Revit Links.

Result would be a combination of these two effects: