Were any of you guys at Nationals? Are those plastic? Are they modular or all one piece?

Were any of you guys at Nationals? Are those plastic? Are they modular or all one piece?

History Arts plaster cast pieces done up by guys from the WOTC mini's guys.
I actually won one of those play areas and got a molded door for playing the guy who created it in Nationals. They're really well put together and I can't wait to break them out some more.
I recognize those plaster tiles anywhere.
Yep, I was there. That's actually me in the picture, the guy on the right, wearing the gray shirt.
I won an event on Sunday morning and took one of the maps home too. It's absolutely gorgeous, and lots of fun to play on.