How does an object into the terrain?

Unity Engine
1

My map is very very very detailed and similar to a particular place:face_with_spiral_eyes::face_with_spiral_eyes:
How does an object into the terrain? my map is very big map i cant use height map or export height map in 3d max by gradient or …
i need editor code for this

2

You’re missing some Verbs here.
How does an object into the Terrain what?
Do you want to put an object into the Terrain?

Please describe what you’re trying to do and show what you have so far.

3

My map have small detail and my map is very big map i have mesh Object in 3dmax Of the map when i make height map by gradient material in 3d max i dont have good answer