toms terrain toolkit is amazing!
https://assetstore.unity.com/packages...
Its always a bit of gamble with free assets.
This is basically like gaias path generator but for FREE
Even if all you do is use this as a path generator its worth your time.
create a terrain.
you need to add 4 + texture layers.
The easiest way for me is to import terrain tookit 2017 and use the pampas preset to setup some textures. Then add a couple more for good luck.
open toms terrain tools
add the road / river image in the first splatmat (just to tell terrain tools the right dimensions of images)
scroll down to roads/rivers and add the same image to this box.
Add the texture of your path /riverbed
Add -5 to -20 to cut a path into the terrain
hit apply
for lots more on how to create forests / terrains in unity see my course
https://www.udemy.com/course/the-joy-...