function UpdateTile(fromnx : int, fromnz : int, nx : int, nz : int) {
	var t : GameObject;
	var tmp = GameObject.Find("Chunk "+fromnx+","+fromnz);
	if (tmp != null) {
		t = tmp;
	} else {
	    t = GameObject.Instantiate(plane, Vector3.zero, Quaternion.identity);
	}

	var Placed = 0;

    var ChunkPosX : float = terrainSize * nx;
    var ChunkPosZ : float = terrainSize * nz;

    var startPosX : int = (terrainSize - 1)*(nx-1);
    var startPosZ : int = (terrainSize - 1)*(nz-1);

    var mesh : Mesh = t.GetComponent(MeshFilter).mesh;
	var vertices : Vector3[] = mesh.vertices;
	var terrainHeight = (terrainSize / 5) * 3;
	for (var cur = 0; cur < vertices.Length; cur++) {
	    var noise : float;
	    var gain = StartGain;
	    var WorldPnt = transform.TransformPoint(vertices[cur]);
	    var Biome = GetBiome(WorldPnt.x,WorldPnt.z);
		for (var oc = 0; oc < Octaves; oc++) {
			noise += Mathf.PerlinNoise((Seed + WorldPnt.x)*gain/(terrainSize * scale), (Seed + WorldPnt.z)*gain/(terrainSize * scale)) / gain;
		   	gain *= 5;
		}
		var height = noise * terrainHeight;
		if (Biome == "Mountain") {
			noise += 0.2;
		}
		vertices[cur].y = noise * 150;
	}

	mesh.vertices = vertices;
	mesh.RecalculateNormals();
	mesh.RecalculateBounds();

    t.transform.position = new Vector3(ChunkPosX, 0,ChunkPosZ);
    t.name = "Chunk "+nx+","+nz;
    t.tag = "Chunk";
}