Question by janaoravcova · Jan 09, 2020 at 01:45 PM · material prefabs prefab-instance independent

Changes done in prefab script get applied to all instances of that prefab.

I am making multiple instances of prefab that has a script asign to it. In the script I am simply changing its color on mousedown. But clicking on one instance of prefab in the scene makes all other instances to change. I tried to change the material, so that each instance has its own material, but it did not seem to help. By logging I found out, that the method called on mousedown gets call for each instance. Could anyone explain this behaviour to me? I attached the code of script of the prefab and also code that I instantiate the prefabs with.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class markTile : MonoBehaviour
 {
 
 
     // Update is called once per frame
     void Update()
     {
         if (Input.GetMouseButtonDown(0))
         {
             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             RaycastHit hit;
             if (Physics.Raycast(ray, out hit))
             {
                 Debug.Log(GetComponent<Renderer>().transform.position+"clicked prefab");
 
                 Color currentEditorColor = EditorController.getEditorController().getCurrentEditorColor();
                 GetComponent<Renderer>().material.color = currentEditorColor;
             }
         }
     }
 }


   public void CreateTileMap()
     {
         for(int i=0; i<gridWidth; i++)
         {
             for(int j=0; j<gridHeight; j++)
             {
                 GameObject tileObject = Instantiate(tileItem);
                 tileObject.transform.localScale += new Vector3(5,5,5);
                 tileObject.transform.position = new Vector3(i * tileOffset + 5 + defaultOffset, j*tileOffset + 5 + defaultOffset, 0);
 
                 //this is the instance I am having problem with
                 GameObject topRightTile = Instantiate(innerTileItem);
                 topRightTile.transform.position = new Vector3(i * tileOffset + 5 + defaultOffset, j * tileOffset + 5 + defaultOffset, 0);
 
                 Material material = new Material(Shader.Find("Specular"));
                 topRightTile.GetComponent<Renderer>().material = material;
            
             }
         }
     }

Add comment · Show 4

unity_-8WUXdN3quKrvw · Feb 23 at 11:42 PM 0

Hi, I got the same problem, have you found the cause of it and/or a solution?

janaoravcova unity_-8WUXdN3quKrvw · Feb 24 at 03:50 PM 0

Hi, I am not sure as it was quite a while ago. I can check the code and refresh my memory.

janaoravcova unity_-8WUXdN3quKrvw · Feb 24 at 04:06 PM 0

I am not sure if it is going to be of any help for you, I am not able to find the previous versions of the code and I am not sure what innerTileItem referred to in the code above but this is how I made the instance in the later version:

janaoravcova unity_-8WUXdN3quKrvw · Feb 24 at 04:07 PM 0

 public override GameObject CreateTile(int i, int j)
         {
             GameObject tileObject = Instantiate(Resources.Load<GameObject>("Prefabs/FirstLevelTile"));
             tileObject.transform.localScale += new Vector3(25,25,25);
             tileObject.transform.position = new Vector3(i * TileOffset, j*TileOffset, -10f);
         
             return tileObject;
         }