Tree blights that are hiding and motionless should actually use the game’s “appear as furniture” system to appear fully as dead trees, so that even if you farlook them they just show up as “dead tree”. Currently they have the same ASCII glyph but appear as “tree blight” in farlook, allowing you to trivially scan the map and confirm any suspicious-looking dead trees to be blights or not. This would also enable the tree blight tile to be distinct from the dead tree tile.