The Flagstones are just a texture I got on the CGTextures website. It had a few seams though that I fixed manually. Its all done in Gimp and I applied a slight bump map to try and take away the very flat feel.
The drop shadow between the flagstones and the underlying cobbles is different in size from the drop shadow cast by the removed flagstones. I will fix that.
I was trying to create the impression that this castle is unbelievably tall, but maybe I went overboard a bit.
Thanks for the kind words.
Torq