Additionally, at this stage I believe a tile is comprised of both the surface and cave terrain (A tile on the surface is always matched to the same tile in the caves, because they are in-fact the same tile). I'm hoping to (perhaps with the help of Rodas) detail the contents of every tile over the coming weeks and integrate that information into my clue tool.

Hello, thought I'd chip in. Everything outside the 5x3 octagonal grid is static. There are exactly 15 octagonal tiles, so every tile is present exactly once. The same cannot be said of the square connector tiles, which seem to be chosen so as to connect all open passageways from the adjacent (octagonal) tiles. Here's what the cave map looks like without the procedurally generated components: