PopulateTerrainMap

void PopulateTerrainMap() { //Tells what height each corner should be

            //Corners are shared, but still need to be one larger so we can hold all of the corner data
            for (int z = 0; z < TerrainData.Width + 1; z++)
            {
                for (int y = 0; y < TerrainData.Height + 1; y++)
                {
                    for (int x = 0; x < TerrainData.Width + 1; x++)
                    {

                        // Get a terrain height using regular old Perlin noise.
                        float thisHeight = TerrainData.GetTerrainHeight(x + chunkPos.x, z + chunkPos.z); //We use + chunkPosition because we dont want every chun to look the same
                        float diggedHeight = (float)y - thisHeight;

                        ChangeVoxel();

                        if(y < thisHeight - 1) {
                            World.Instance.blockID = 3; //Dirt
                        }

                        blockID = World.Instance.blocks.blockTypes[World.Instance.blockID].blockID;
                        blockName = World.Instance.blocks.blockTypes[World.Instance.blockID].Name;


                        // Set the value of this point in the terrainMap array and stores the data so we dont regenerate the data everyytime we modify the terrain.
                        terrainMap[x, y, z] = new TerrainPoint(diggedHeight, blockID, blockName); //Get the dst to surfac value and returns a random texture ID
                    }
                }
            }
        }