example_dynamic_texture.cs

    public string devUpdateUrl = "http://thefortawesome.com/static/fa_game/dev_update.png";

    IEnumerator Start() {
    
        Texture2D tex;
        tex = new Texture2D(4, 4, TextureFormat.DXT1, false);
        WWW www = new WWW(devUpdateUrl);
        yield return www;
        www.LoadImageIntoTexture(tex);
        GetComponent<Renderer>().material.mainTexture = tex;
    }