Removing a material from a list by referring to a GameObject's material

Graphics Shaders & Materials
1

Heya! So I’m trying to remove a material from a list by referring to a GameObject’s material. The list includes the material the GameObject has, as the material for the GameObject is infact given from the list. However, when I refer to the GameObject’s material in an attempt to remove it from the list, this does not work. Here’s the code:

void Start () {
    materials.Add (blue);
    materials.Add (yellow);
    materials.Add (green);

    midRend = middleCube.GetComponent<MeshRenderer>();
    midRend.material = materials[Random.Range(0, materials.Count)];
}

void OnTriggerEnter2D(Collider2D col) {
    int ranIndex;
    Material save;
    if(col.tag == "MiddleCube") {
        save = midRend.material;
        materials.Remove(save);

        ranIndex = Random.Range(0, materials.Count);
        midRend.material = materials[ranIndex];

        //materials.Add(save);
   }
}

What could be of help here? It seems as if the material I’m plugging into the middle cube is actually an instance and not the actual material, so I think this might be the problem. How could I make it not an instance? Thanks.

2

I believe there is a Renderer.sharedMaterial you can set instead, that won’t instance it at assignment time. Check the docs for something along those lines.