Perlin noise выдает одно значение

[HAYT]

Код:


using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class WorldGen : MonoBehaviour {

public int sizeX;
public int sizeZ;
public int Height;

public GameObject cur_block;


private void Start(){
GenerateW();
}


private void GenerateW(){

for (int x = 0; x < sizeX; x++){
for(int z = 0; z < sizeZ; z++){

float y = Mathf.PerlinNoise (x/2, z/2) * Height;
Instantiate (cur_block, new Vector3(x,y,z), Quaternion.identity);

}
}
}


}

В Debug log'e : y: 2.5.... Все на одной высоте.