This is the Xonthal's Tower Dungeon from Rise of Tiamat.
I've tried to follow the text descriptions closely, and I've layered floor textures and lit it as fairly dim to try to give it the right feel. I'm proud of this one, with some interesting effects like the scrying crystal looking through to the plane of fire and the corridor like the stars of space. I hope you enjoy it, too.
I've also completed Xonthal's Tower hedge maze and the tower itself as two separate maps that are also public - look 'em up if you want them!