public int Render(int t, IBitmap tobm, IFrameRendParams frp, IntPtr hwnd, IRendProgressCallback prog, IViewParams viewPar)
 {
     throw new NotImplementedException();
 }
 public void Close(IntPtr hwnd, IRendProgressCallback prog)
 {
     throw new NotImplementedException();
 }
 public int Open(IINode scene, IINode vnode, IViewParams viewPar, IRendParams rp, IntPtr hwnd, IDefaultLight defaultLights,
                 int numDefLights, IRendProgressCallback prog)
 {
     throw new NotImplementedException();
 }