Updating multiple materials on one mesh only works after clicking in Inspector?

Sooo, I have an object with two materials on it. I create and store a reference to a new material, and can set the one color just fine by doing this pseudocode:

Code (csharp):

1.  
2. material1Copy = new Material(GetComponent<Renderer>().sharedMaterial)
3. material1Copy.color = whatever
4. GetComponent<Renderer>().material = material1Copy;
5.  

However, when trying to change material 1 AND 2 like

Code (csharp):

1.  
2. material1Copy = new Material(GetComponent<Renderer>().sharedMaterials[0]);
3. material2Copy = new Material(GetComponent<Renderer>().sharedMaterials[1]);
4.  
5. material1Copy.color = whateverColor1
6. material2Copy.color = whateverColor2
7.  
8. Material[] myMaterials = new Material[] { material1Copy, material2Copy };
9.  
10. GetComponent<Renderer>().sharedMaterials = myMaterials;
11.  

It doesn't appear to work in the game view... but if I click on the object in the inspector while the game is playing, and click on the circles next to the materials, they update and magically display the right colors.

What am I missing?

This is in 5.1.1 using the standard shader.

 

Enabling keywords was the ticket, I needed to .EnableKeyword("_EMISSION") and everything magically started working.

Thanks Karl

 

Thanks this helped a lot!

Note that if you are using the Standard Shader and trying to apply to '_BumpMap', you have to use '_NORMALMAP'.

 

i am facing the same issue in Unity 5.6.1 and .EnableKeyword() is not helping...
I want to apply AOMap on the materials. AOMap and materials are in the asset bundle..
Please check my code -:
temp.EnableKeyword("_DETAIL_MULX2");
temp.SetTexture("_DetailAlbedoMap", aoTexture);
temp.SetFloat("_UVSec", 1.0f);