Attached Link: http://www.renderosity.com/mod/gallery/index.php?image_id=465795&member

There is always a way. Asmentioned but in different words,, you can start in back with say 5 figures, render save as tiff and import it back as a background picture. Better, attach it to a onesided square. Delete old figures,,, load new ones, render,,, save,, import.

Did this a looong time ago. Armies can be rendered this way. If you are clever,,, good DOF can be achieved also.