Background of SHOW_ALL

This is a fine trick on v2, but does not work on v3.7.

I know I can get the same effect by followings:

  1. use FIXED_HEIGHT or FIXED_WIDTH
  2. set background to cover the full screen.
  3. put content over the background, set its position to center and clip it.

But my project is now a bit too complicated to do that.
Is there any way to use the trick of the link on v3.7?

Thanks.