Assigning multiple materials to a gameobject through script?

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How do I assign multiple materials to a gameobject through c# script?

What I have tried so far is:

public GameObject go;
public Material Mat1;
public Material Mat2;
void Start()
{ 
     //this does not work
     go.GetComponent<Renderer>().materials[0] = Mat1; 
}
unity3d c#
3 Answers

You cannot update the materials directly, but you need to create a new materials array and assign it.

void Start()
    {
        //create your materials
        var yourMaterials = new Material[] { Mat1, Mat2 };
        //assign it
        go.GetComponent<Renderer>().materials = yourMaterials ;
    }

You may also check the documentation.

Note that like all arrays returned by Unity, this returns a copy of materials array. If you want to change some materials in it, get the value, change an entry and set materials back.

user_86569720

From the documentation:

Note that like all arrays returned by Unity, this returns a copy of materials array. If you want to change some materials in it, get the value, change an entry and set materials back.

Renderer rend = go.GetComponent<Renderer>();
Material [] mats = rend.materials;
mats[0] = Mat1;
rend.materials = mats;
user_14294870

if you want to change multiple materials you need to change the whole array. so you first create an array of materials with the same length as the current renderer:

Material[] newMaterials = renderer.sharedMaterials;
for(int i = 0; i <newMaterials.Length; i++)
{
newMaterials[i] = theMaterialYouWantToSetX;
}

and then you assign the array to the renderer:

renderer.materials = newMaterials;
user_103276980
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