I am working on a map for an open world project. I am currently designing it in Photoshop which then I will try my best to replicate on Unity terrain by hand.
I have looked around and have been wondering if there is any way to use a mask texture to make Unity terrain automatically paint a path 1:1, even if it uses just one texture layer.
This is the map I'm working on in Photoshop.

And this is how I've tried to replicate it by hand on the Unity terrain. Is there any way to automate this?

Photoshopdocument a requirement? \$\endgroup\$