Question How can I generate TerrainData (and a Terrain Collider) for a non-standard terrain?

Hi there,

I have created a procedurally-generated terrain made up of equilateral triangles by adapting the Sebastian Lague technique. It looks like this:

https://imgur.com/a/rcnoHPO

You can see in the third image that I have produced the equilateral triangles by offsetting every second row on the z axis by half the width of a triangle, which I believe may cause some issues for creating TerrainData.

The problem I have run into is trying to generate TerrainData for the Terrain object so that I can pass it to the TerrainCollider and raycast to the terrain to place objects, as well as having characters walk atop it. When I try it unfortunately generates a garbled pink terrain.

The methodology I have been using to generate the TerrainData is as follows:

Code (CSharp):

1.     TerrainData GenerateTerrainData(TerrainData terrainData){
2.         terrainData.heightmapResolution = coordinateMapper.mapGenerator.mapWidth + 1;
3.         terrainData.size = new Vector3(coordinateMapper.mapGenerator.mapWidth, coordinateMapper.mapGenerator.mapHeight, coordinateMapper.mapGenerator.mapWidth);
4.         terrainData.SetHeights(0,0,coordinateMapper.mapGenerator.noiseMap);
5.  
6.         return terrainData;
7.     }
8.  
9.     public void AssignTerrainData(){
10.         terrain.terrainData = new();
11.         terrain.terrainData.name = "Procedural Test Mesh Data";
12.         terrain.terrainData = GenerateTerrainData(terrain.terrainData);
13.         terrain.gameObject.GetComponent<TerrainCollider>().terrainData = terrain.terrainData;
14.     }

Can anyone tell me how to correctly produce the TerrainData? Or if indeed it is possible for a non-standard (i.e. non-rectangular) terrain?

Thanks for your time.