Building Topography with meshes

I don’t know how I started to create the terrain anymore. The project was 2011. I remember me that it was refined more and more over the time.
I remember me that often I used tsSplitCurves to add details. It allow me to draw additional lines for details and get the right splits of the exist lines. It was funny to work like a spider. I don’t used the T-spline technology so much, maybe only T-Spline mesh and curve tools. So, working on organic shaped isn’t so much a question of impressive innovative code, it’s more a question of little tools like MeshFromLines.

This is the earliest state of my terrain I found. I deleted a lot of old files, so I don’t know how I started. I remember me that I tried to create quad sided polygons only and avoid triangles.