Overlay Scene

7. Add a material to the object
  • Properties Menu >> Materials tab >> New

8. Set to object material to Shadeless
  • Properties Menu >> Materials tab >> Shading tab >> Shadeless checkbox

Note:
  • The Overlay Scene doesn't have a light.  Setting the material to shadeless will let us see the object.
9.  Switch back to the main scene
  •  Info menu >> Scene box list >> Select main scene
Note:
  • The overlay scene is added in the main scene.