Lay the spline all the way around (if it is a curvy trench) or in sections (if it is boxy). Step 3: Select the spline tool, go to wall->support and choose whichever fits your fancy. Step 2: Carve out the rough shape you want to BOTTOM of your trench to be. (adjustable but this will put soldiers at about mid chest. 75 meter below where the terrain height currently is. Set feather to zero, and height to about. I figured I would pass on the fruit of my labor and a short walkthrough for those silly enough to follow in my footsteps.
