Change material shader in game

Unity Engine
1

I want to change material shader in game, like from tessellation shader to a simple diffuse shader, i use this material as my ground texture. Now, when i try to play my game in unity editor, shader changes correctly, but when i build a separate pc game, my texture change from tessellated to plain pink color. Piece of code :

/*In some function*/
if(Input.GetKeyDown(KeyCode.V)) {
    if(tessellation) {
      ChangeTextures("Bumped Diffuse");
      tessellation = false;
    }
    else {
      ChangeTextures("Tessellation/Bumped Specular (displacement)");
      tessellation = true;
    }
  }

function ChangeTextures(name : String) {
  var obj : GameObject[] = FindObjectsOfType(GameObject) as GameObject[];
  for(var a : GameObject in obj) {
    if(a.name == "Earth Plain") {
      a.GetComponent(MeshRenderer).material.shader = Shader.Find(name);
    }
  }
}

So, what is wrong, whats happening in my game ? Is it not able to change a shader properly, or maybe material textures gets reseted and i need to set textures again after changing shader ?

2

Never mind, managed to do it by creating global array of Material, then creating some materials, assigning materials to array through unity Inspector, and then just changing in code a.getblaah.material = matsArray .