Is it possible to modify the terrain in rooms you control?

If not I think this would be a cool feature to add to the game.

It would work something like only if you are in control of a room controller, then you can create/remove swamps.  Even more fun would be the ability to create/remove the permanent walls.

To preserve functionality there would have to be something that made it so that room controllers could not be isolated by permanent walls.

Whattayall think?