What I want to do is make a helix loop because of two routes I joined together having different heights. But, when I use the smooth tool to raise land under the track on the helix, then it just creates a narrow curved strip of land under the track with vertical cliffs, how do I do something similar to Tehachapi Loop where it has sloping embankments and not this track in the sky effect? I could try raising ground inside of the loop to start. How do I get rid of the vertical cliffs where the two routes joined?
