Sidestepper wrote:What are the thresholds for the various visual changes to the dungeon map icons? I now for sure that
1 Class = Icon grows to full size
3 Classes = Icon gains a cliff around its border
4 Classes = The cliff border gains a shadow effect
18 Classes = Rainbow border
Are there other thresholds? Do the cliffs gradually become taller with each class, or is it just a one time thing?
I'd love to know more about this. Your information isn't correct. In my major kingdom, I can see three dungeons with a cliff effect; I don't know whether they have what you call the "shadow effect" or not, but they seem to be shadowed as if lit from the northwest. They are:
Den of Danger (12 classes; 9/10 badges)
Venture Cave (7 classes; 10/10 badges)
Southern Swamp (5 classes; 10/10 badges)
But! I have other dungeons with no cliff effect at all, shadowed or no:
Eastern Tundra (3 classes; 8/10 badges) -- this dungeon icon is exactly identical to the Eastern Tundra in my minor kingdom, with only 1 class and 4/10 badges.
Shifting Passages (5 classes; 4/10 badges)
Western Jungle (2 classes; 7/10 badges)
Halls of Steel (3 classes; 5/10 badges)
All of my cliffy dungeons have no remaining quests, but I have some dungeons, such as Shifting Passages, that have no remaining quests and no cliff.
I also have Ick Swamp (4 classes; 5/10 badges). I honestly don't know if the icon is showing a cliff or not. If it is, the Ick Swamp cliff is not as bright-silver-colored as my three definite cliffs. But it could easily just be part of the dungeon graphic.
We can definitely conclude that there's a badge dimension to dungeon icon upgrades; it's not solely determined by class completion. But my completion isn't as great as it could be; more research is needed (or... the devs could tell us! <3 ). I'd especially like to know what happens to a dungeon cleared with 1 class and 9 badges, 18 classes and no badges (or at least very few badges), and 18 classes and 8 badges. I also haven't involved the vicious badge (I've never used the token); it'd be interesting to know how the vicious badge interacts, e.g. in a dungeon with 1 class and only the vicious badge, or 1 class and 11/10 badges.
edit: playing further in the undeveloped kingdom, Eastern Tundra still has no cliff with 1 class / 9 badges completion.