| originTerrain | Terrain that is given tile coordinate (0,0). |
| filter | Filter to apply when populating the map. See Also: TerrainFilter. If null, no filter is applied. |
| fullValidation | Validate the Terrain map. Default is true. |
TerrainMap The resulting Terrain map. Can return null when no Terrain objects pass the filter.
Creates a TerrainMap from the neighbors connected to the origin Terrain.
Creates a TerrainMap of all the Terrain neighbors connected to the origin Terrain that pass the TerrainFilter.