I wanted to make a quick example of tire tracks in Terragen, and when I went and did the first render, I noticed more tracks than there should be. I'm not sure what the issue is here. There are marks on the right side as well when you mess with texture colors and sun position. There is only 4 SSS shapes, and those are the main tracks prominently visisble, 2 overlayed for each track. The rise form mud and fall from tires.
TGD is modified but track issue still visible. Was trying to solve it.