Unfortunately, I didn't realize until I got home from Gen Con that one of the cardboard flats in my copy of Vast had scoring marks across one side. The flat in question contained most of the Crystal cave tiles, rendering them instantly identifiable, even when "hidden."
I've contacted the publisher for replacement tiles, but judging by the comments in his open letter, it may be a while.
Aside from not allowing anyone to play as The Cave, are there any suggestions out there for how I might be able to play with the marked tiles? Anything I could do to cover the scoring marks would similarly distinguish the Crystal tiles from the rest of the set. And I'd rather not mark up the other cave tiles to match.
What I would do is print out the tiles from the PnP file (or scan your own tiles) on sticky paper (no idea how it's called, but you know, paper that consists of 2 layers that's sticky on one side when you remove the other layer), paste them on cardboard and cut them out.