Modular Landscape Kit MLK CS 2SG FT MGG1 Cutting Spline 2 Slopes Gradual Fence Top
A basic cutting spline, which is double sided in order to compensate for the different normals shading depending on which direction the spline is drawn out from its origin - so a standard two-sided cutting can be made from two of these splines extruded in opposite directions and the colours will match. As shown in the screenshot, you can use one of my matching Flat Plane Splines to create a top to extend towards higher levels on the baseboard.
The texture matches other assets sharing the MGGI suffix.
You will find further details and examples of their use in my 'Modular Landscape Kit' thread in the Freeware Anouncements section of the Trainz forum.