How do I draw a image under a 3D world?

The following code would draw a foreground on my 3D game:

repeat
updateworld
renderworld
drawimage image,0,0
flip
forever

but if I want to draw my image UNDER the 3D objects, how do I do this?

The ideal would be:

repeat
updateworld
drawimage image,0,0
renderworld
flip
forever

but it does not work.

Any hint, please?