Sorry, forgot to mention this... The special tile made me think that here might be a way to create a terrain taht could be "marked" with a special flag that would reveal it to be interesting or special to a rogue or a minesweeper/scanner for ships. What I am thinking of is a detect traps kind of thing, but I guess the flag could be named "detectable". How I see it is a skill would have the flag detect_tile or something similar. Add a chance to it, maybe put in an exhaustion effect and you got a detect skill for hidden terrain that can cause damage or activate traps, or even detectsecret passages. al "The truth will set you free" Jesus Christ of Nazareth 33A.D.