TileMapGenerator.cs

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

public class TileMapGenerator : MonoBehaviour
{

    public int xTiles, zTiles, yTiles;//basic length,width,height variable to do math on how many total tiles to cerate
    public GameObject tilePrefab;//prefab of basic tile were creating
    public Transform spawnPosition;//original position of where tiles get created to
    // Start is called before the first frame update

    public void Start()
    {
        //GenerateMapInital();
    }

    public void GenerateMapInital()
    {
        int xPos=0, zPos=0, yPos=0;
        for(int tilePos = 0; tilePos < (xTiles*zTiles)*yTiles;tilePos++)//length*height gives area of square yTiles will be used later to add floors/layers
        {
            GameObject tileObject = GameObject.Instantiate(tilePrefab, spawnPosition.position + new Vector3(xPos, yPos, zPos), Quaternion.identity);//instatiate the tile
            tileObject.transform.SetParent(this.transform);//set it as a child of this object to clear cluter
            xPos++;//increase XPos so tiles get spawned to different position
            if(xPos >= xTiles)//if XPos reached limit reset it to 0 and increase zPos
            {
                xPos = 0;
                zPos++;
            }
        }
    }
}