Nice job to whoever made this. If you include the time it took to just grind those materials, I'd say it took many, many hours. I decorated a city tent once pre-pre-wipe, though nothing compared to this ;p
By the way... anyone else thing that Flares are very much needed for things like this? I remember seeing a lot of amazing art during the last pre-wipe that players did in their tent/base. And a lot of those decorations involved flares. It's sad to see that flares can no longer be used for ground art.
Just like how doors in only bases/tents never close now, maybe a script could be done to make it so that Flares never die, but only in bases. I know that's a stretch... and probably not easy to do, though. Or maybe just make Flare last forever until the Flare feature is actually done.