How to animate secondary maps?

Hi there,

I'm trying to animate water with the unity 5 standard shader.
I have to normal maps assigned to the material. First as Main Map the second under "Secondary Maps".

If I try to animate the offset of the texture with "_MainText" only the first Map ist moving.
How can I animate the secondary normal map a assigned?
With "_BumpMap" nothing happens.

Here is my Script:

Code (CSharp):

1.     Renderer rend;
2.     public float speed = 0.5f;
3.     Vector2 start = Vector2.zero;
4.     string normal = "_BumpMap";
5.     string main = "_MainTex";
6.  
7.     // Use this for initialization
8.     void Start () {
9.  
10.         rend = GetComponent<Renderer>();
11.     }
12.    
13.     // Update is called once per frame
14.     void Update () {
15.         start += (new Vector2(speed, 0f) * Time.deltaTime);
16.         if (rend.enabled)
17.         {
18.             rend.material.SetTextureOffset(main, start);
19.         }
20.     }

Thanks for helping me out.

 

For me, setting stuff to "_DetailAlbedoMap" seemed to work.

Example:

Code (CSharp):

1. rend.material.SetTextureOffset("_DetailAlbedoMap", start);