Very easy actually. Just DrawImage your images after you've rendered the scene (RenderWorld).
Note that 2D graphics do not automatically scale to different resolutions. If this is not a problem then use the 2D commands.
If you need the "2D graphics" to scale to different resolutions, then a better option would be to create a 3D sprite and place it directly in front of the camera or draw it with CameraCLSMode to True after rendering the background first.
Note that 2D graphics do not automatically scale to different resolutions. If this is not a problem then use the 2D commands.
If you need the "2D graphics" to scale to different resolutions, then a better option would be to create a 3D sprite and place it directly in front of the camera or draw it with CameraCLSMode to True after rendering the background first.