Whoah. The shadows look great and all, but taking away all those maps we're used to is a pity. Hopefully, it will be compensated by the community through brick builds of maps. Allowing the user to save builds as a "map_build" or something would separate them from the remaining builds, and conveniently clear the risk of destroying it by mistake. There could also be another "clear bricks" button that doesn't remove the map bricks.
There's quite a stream of posts going on here.