Has anyone ever used code to change the materials on an instantiated game object?

Questions & Answers
1

Hello! So I’m trying to change the material on a quad to a random picture whenever I load up the game. I’m using a for loop to instantiate the quad’s so it would be great if I could make their materials random.

Yes I read the API and it wasn’t helping me with my specific circumstance which is why I was hoping someone here could point me in the right direction.

public Material[] mats;
void levelCreate()
    {
        Material mat = mats[Random.Range(0, mats.Length)];
        if (easy == true)
        {
            GetComponent<Renderer>().material = mat;
            for (int i = 0; i < 5; i++) //makes the columns in the 5 by 5 grid
            {
                for (int j = 0; j < 6; j++) //makes the rows in a 5 by 5 grid
                {
                    Instantiate(prefab, new Vector3(j * 1.5f - 3, i * -1.5f + 3, 0), transform.rotation);
                    prefab.name = count.ToString();
                    count++;
                    gameStart = false;
                }
            }
        }
    }

Oh and I read the API from Unity - Scripting API: GameObject.GetComponent
Unity - Scripting API: Renderer.material and Unity - Scripting API: Random.Range

2

Something like that:

    public Material[] mats;
    void levelCreate()
    {
        Material mat = mats[Random.Range(0, mats.Length)];
        if (easy == true)
        {
            for (int i = 0; i < 5; i++) //makes the columns in the 5 by 5 grid
            {
                for (int j = 0; j < 5; j++) //makes the rows in a 5 by 5 grid
                {
                    GameObject go = Instantiate(prefab, new Vector3(j * 1.5f - 3, i * -1.5f + 3, 0), transform.rotation) as GameObject;
                    go.name = count.ToString();
                    //if you have only 1 material:
                    go.GetComponent<Renderer>().material = mat; //if you have multiple materials then loop through materials[X]
                    count++;
                    gameStart = false;
                }
            }
        }
    }

I’ve removed your line#7, get it back if it was intended, also j < 6 => j < 5.

The main part of the answer is obviously Instantiation (line #11 and #14 in my example).