Material.SetTextureOffset only working for _MainTex, Unity 5.6.0f3

I want to scroll the Bump Map and Detail Normal Map in opposite directions on a standard Unity material.

But only "_MainTex" responds to SetTextureOffset.

The exact same code applied to "_BumpMap" or "_DetailNormalMap" does nothing.

I can adjust the UV tiling of these independently in the editor, why not in code?

Code (CSharp):

1.  
2.  
3. public Vector2 MainTexOffset;
4. public Renderer materialRenderer;
5.  
6. void Start ()
7.     {
8.         if (materialRenderer == null) materialRenderer = GetComponent<Renderer>();
9.     }
10.  
11.     private void Update()
12.     {
13.         // works
14.         materialRenderer.sharedMaterial.SetTextureOffset("_MainTex", MainTexOffset * Time.time);
15.  
16.         // doesn't
17.  
18.         // materialRenderer.sharedMaterial.SetTextureOffset("_BumpMap", MainTexOffset * Time.time);
19.         // materialRenderer.sharedMaterial.SetTextureOffset("_DetailNormalMap", -MainTexOffset * Time.time);
20.  
21.     }

 

Standard Shader only applies offsets to the main texture.

Check out this thread for how to alter the standard shader to support more offset values for secondary textures:
http://answers.unity3d.com/questions/1032160/settextureoffset-standard-shader.html

 

Already seen that thread thanks, it doesn't work beyond Unity 5.5 (according to the final comment posted).

If the only solution is to alter the standard shader, Unity need to rewrite their docs - which state that SetTextureOffset can be applied to named properties. This is the expected behaviour - normally, properties you can set in the inspector are accessible via script.

https://docs.unity3d.com/ScriptReference/Material.SetTextureOffset.html

There is already a separate mainTextureOffset method, which would seem to make SetTextureOffset pointless if it cannot be used with anything other than the main texture in standard shader.

 

My bad for linking out of date information, I don't claim to be an expert on shaders and I'm not up to date on the state of this sort of thing. I agree, it's not intuitive at all, and should be supported. It definitely seems odd that you can individually alter offsets in the inspector but not in code.

I would post this over in one of the graphics/shader specific subforums and see if you can get a more technical explanation or workaround.