ToME WikiWhen Ironman rooms are turned on, Thrain and his Nazgul tormenters rarely if ever show up in Dol Guldor, although the quest message appears as it should. When I turn on Wizard mode to look into level generation on entering the level where Thrain is imprisoned, I see the creation of several SPECIAL_GENE monsters failing ("monster cannot cross terrain").
(Could this be caused by random vaults being placed before predetermined features, if such is the case?)
NeilStevens: Well, the Thrain room is basically a special vault and yes, it can't ever be generated if the rooms are already taken up by vaults, as in the case when you have the Always Interesting Rooms option turned on.
SigSegv: Why are the random vaults being created before the special vaults?