Share material on Instantiate()

I have a script that `Instantiate`s a number of objects. When I look them up in the inspector their materials are called "MaterialName (Instance)" and these seem indeed separate instances of the material - if I tweak the parameters of the original material none of the instantiated objects' appearances change. Is it possible to make the Instantiated objects keep the original material instead?

I tried to set `.sharedMaterial` after instantiate, like:

var clone : GameObject = Instantiate(proto);
clone.renderer.sharedMaterial = proto.renderer.material;

but it doesn't help. I guess I lack understanding of how `.material` and `.sharedMaterial` work.

May be the problem is due to my cloning logic (`clouds[ ]` is an array of clones):

    // clone the gameObject this script is connected to...
    var proto = Instantiate(gameObject);
    // make sure this script won't be called on clones = false;
    // make clones of the proto-clone
    for(var i=0; i<clouds.length; ++i) {
            clouds *= Instantiate(proto, transform.position, transform.rotation);*
 _clouds*.transform.parent = transform;*_
 <em>_clouds*.name = "Cloud LOD"+i;*_</em>
 <em><em>_clouds*.active = false;*_</em></em>
 <em><em>_*// remove this script from the clones*_</em></em> 
 <em><em><em>_*// [... further cloud setup ...]*_</em></em></em>
 <em><em><em>_*// destroy the proto-clone*_</em></em></em>
<em><em><em>_*<p>The reason it's like this is that I want the artists to be able to place and manipulate the prototypes in the editor, then have them spawn their clones at run-time. Among other things they may change the material used for this particular prototype (but also other things, like particle system parameters). </p>*_</em></em></em>
<em><em><em>_*<p>May be that's what I'm doing wrong and there is a better way?</p>*_</em></em></em>

The issue is that when you read .material from proto, it'll create an instance. I don't think the second line is necessary at all though - it should use the same sharedMateral as the original prefab. What you need to do is make sure that you're using .sharedMaterial to manipulate any colour or texture changes