Changing borad image during play

I have a board with which I would like to change images during play. The board is a graveyard map. Images are different nationalities war cemeteries. Depending on which country has which side, I would like to change the underlying image, or the board, to match the country. Change the board image does not seem to be an option. That leaves a “piece” on a layer below everything else.

I’ve tried creating an At Start Stack. I can’t reorder the pieces as a normal stack.
I’ve tried creating a deck with selectable card. The selected card doesn’t stay on top.
I’ve tried 2 boards in my map. Of course I can’t change the images.
Building image layers in the piece would be rather limiting, and otherwise not desirable.

Any ideas on what I may not have tried yet?
Thanks,

Have you tried creating tiles and making the tiles invisible? Check out the work on the Imperial assault mod.

I’ll take a look. It might work.

Thanks