Updating Texture2D with Rift

Hi, I am trying to take advantage of C#'s built in graphics and drawing to create dynamic textures for a HUD. This works just fine with the normal camera. However, when I try to use it with the Oculus, the textures don't update. This is the class file that I am using:

public class UpdateRender : MonoBehaviour {

    [SerializeField] private Texture2D m_LevelPi;
    [SerializeField] private Texture2D m_DepartmentPi;
    private Image m_LevelPiImg;
    private Image m_DepartmentPiImg;

    public bool m_Update;

    // Use this for initialization
    void Start () {
        m_LevelPiImg = new Bitmap (256, 256);
        m_DepartmentPiImg = new Bitmap (256, 256);
        m_Update = true;

        using (var g = System.Drawing.Graphics.FromImage (m_LevelPiImg)) {
            g.FillRectangle (new SolidBrush (System.Drawing.Color.Black), new System.Drawing.Rectangle (96, 96, 64, 64));
        }
    }

    // Update is called once per frame
    void Update () {
        if (m_Update) {
            MemoryStream ms;
            // Load Levels
            ms = new MemoryStream();
            m_LevelPiImg.Save(ms, ImageFormat.Png);
            ms.Seek(0, SeekOrigin.Begin);
            m_LevelPi.LoadImage(ms.ToArray());
            ms.Close();
            // Load Departments
            ms = new MemoryStream();
            m_DepartmentPiImg.Save(ms, ImageFormat.Png);
            ms.Seek(0, SeekOrigin.Begin);
            m_DepartmentPi.LoadImage(ms.ToArray());
            ms.Close();
            ms = null;
            m_Update = false;
        }
    }

    public Image GetDepartmentPi() {
        m_Update = true;
        return m_DepartmentPiImg;
    }

    public Image GetLevelPi() {
        m_Update = true;
        return m_LevelPiImg;
    }
}