Note that an existing installation of MapMagic 2 with Objects Module is required in order to use this module. The module is currently in early access stage. The functionality is limited, but you can get and keep it for the half price.

The official module of the MapMagic 2 world generator. Brings in splines to MapMagic, that could be used to create roads, streams, rivers or other prolonged objects.

Check out the details from the Unity Asset Store: https://assetstore.unity.com/packages/tools/terrain/mapmagic-2-splines-beta-165419#description