gnarlygninja
Legend
It wasn't a map that I made but I once had a player become obsessed with 'this strange thing' on the map, coming up with wild theories about it.
It was just the border of the map.
It was just the border of the map.
Thats a really cool idea! Thank you for mentioning itI made PC specific maps to start a campaign once. I took the original map and added small details for each PC that may not be on the other maps. It took a couple levels for the players to notice. I think one player mentioned that they could just go to X and the others were looking at their maps confused since X was not on their map. It was a cool moment but then everyone just traded maps to help fill in their own.
I think embellishment and extra details are awesome to add to maps and illustrations. Look at so many of the classic art, maps and illustrations that have somethin extra; a spider in a corner, an extra large tree, a cave or a special lantern or whatever.
IMO especially important for maps, in game it's likely a map is not custom built for the adventurers, but rather something with all local knowledge of an area, even things added based upon rumor, myth or a cartographer's means of identifying copies.
i.e. it's well documented IRL that cartographers often add fake places to maps so that if someone copies their map and includes the fake "thing" they know their map was copied. Such as Argleton, Lancashire or Goblu, Michigan.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.