can i use a hexagon mesh on a Terrain?

can i change the mesh on a terrain object to have hexagon-triangle tiles? the tiles are already tileable on a terrain with normal mesh planes.

Can i use 100 small terrain objects in a game of 100x100 vertices each and tile them into a giant zone, move and update the edge ones’ mountains as a player moves to make new horizon edges, and they would manage LOD?

The Unity Terrain is a quad-grid only. If you want a hex-grid you’ll have to write that yourself.