Walking on the Terrain

[_Aka_]

Curvy has some build-in features that handle this:

• The Conform Path CG module: this module allows you to project a spline onto colliders. This is most useful if your spline is modified at runtime.
  
• The Camera Project action from the toolbar: Select multiple CPs and use this action to project them onto colliders using the Scene View camera looking direction. This is most useful to project splines at edit time, knowing that they will not have to be modified at runtime.
  

Does this meet your needs?