When i try to change the scale of a prefab with a script, it always becomes 0

Questions & Answers
1

When I try to change the scale of an object to something random, instead it sets the values to 0,0,0, also this is ina prefab, and I think it is the problem, but I don’t know what to change about the script, as I am fairly new to unity, and don’t understand most technical terms yet, here is the code:

public Rigidbody rb;
public Material material1;
public Material material2;
public Material material3;
public Material material4;
public GameObject thisplanet;
int materialselect;
Vector3 planetsize;


// Start is called before the first frame update
void Start()
{
    int materialselect = Random.Range(1, 4);
    var randnum = Random.Range(3000f, 6000f);
    Vector3 planetsize = new Vector3(randnum, randnum, randnum);
    
}
void Update() 
{
    if (materialselect == 1)
    {
        thisplanet.GetComponent<Renderer>().material = material1;
    }
    else if (materialselect == 2)
    {
        thisplanet.GetComponent<Renderer>().material = material2;
    }
    else if (materialselect == 3)
    {
        thisplanet.GetComponent<Renderer>().material = material3;
    }
    else
    {
        thisplanet.GetComponent<Renderer>().material = material4;
    }
    thisplanet.transform.localScale = planetsize;
}
2

I managed to fix it

using JetBrains.Annotations;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Drawing;
using UnityEditorInternal;
using UnityEngine;

public class PlanetGen : MonoBehaviour
{
    public Rigidbody rb;
    public Material material1;
    public Material material2;
    public Material material3;
    public Material material4;
    public GameObject thisplanet;
    public int materialselect;
    private Vector3 planetsize;
    
    
    

    // Start is called before the first frame update
    void Start()
    {
        
        int materialselect = UnityEngine.Random.Range(1, 4);
        var randnum = UnityEngine.Random.Range(100f, 4000f);
        planetsize = new Vector3(randnum, randnum, randnum);
        if (materialselect == 1)
        {
            thisplanet.GetComponent<Renderer>().material = material1;
        }
        else if (materialselect == 2)
        {
            thisplanet.GetComponent<Renderer>().material = material2;
        }
        else if (materialselect == 3)
        {
            thisplanet.GetComponent<Renderer>().material = material3;
        }
        else
        {
            thisplanet.GetComponent<Renderer>().material = material4;
        }
        thisplanet.transform.localScale += planetsize;

    }
 }