GenCubeEffect.cs

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

public class GenCubeEffects : MonoBehaviour
{
    public string genEffect;//name of the genCubeEffect (what happens when the cibe hits a tile is it turned to grass, spawn a enemy etc)

    private void OnCollisionEnter(Collision objectHit)
    {
        if(objectHit.gameObject.tag == "tile")
        {
            if(genEffect == "lava")
            {
                objectHit.gameObject.GetComponent<Renderer>().material.color = Color.red;//change the color of the tile
                objectHit.gameObject.GetComponent<tileControl>().tileType = "lava";//change tile Control of hit tile to type
            }
            else if (genEffect == "grass")
            {
                objectHit.gameObject.GetComponent<Renderer>().material.color = Color.green;
                objectHit.gameObject.GetComponent<tileControl>().tileType = "grass";
            }
            else if (genEffect == "height")
            {
                objectHit.gameObject.GetComponent<Renderer>().material.color = Color.black;
                objectHit.transform.localScale += new Vector3(0,1,0);//increas height of tile
                objectHit.transform.position += new Vector3(0, .5f, 0);//move tile to half the size of increase from last line
                objectHit.gameObject.GetComponent<tileControl>().tileType = "height";
            }

            Destroy(this.gameObject);//destory the genCube
        }
    }

}