The maps aren't being completed.

[Aspen]

This is really getting on my nerves. I completely combed through one of the floors in the sealed cave and B4 of Lunar Subterrane. Hugged the walls, and went through every spot i'm allowed and the map forever stays at 99%. I actually remember the floor in the sealed cave having one little spot on the map that I actually couldn't reach and i have no clue where the spot in the Lunar Subterrane B4 I'm missing because i've gone over it many times and have been going over ever map for each floor i've been going through. Really wish I knew what was causing this or what i'm doing wrong.

[SlaughterThemAll]

I was stuck at 99 for awhile too, Keep hugging the walls and get every nook n cranny. Might want to get the safe travel to make it easier if you dont already.

[lilwing]

IIRC to complete B4 you need to re-enter it from B3.

[Akatosh]

I have 100% completion of all maps, so I can confirm you it is doable.

I rememeber some maps were really hard to complete because of a little damned pixel; just keep doing what you did : follow the walls, enter/exit all doors, etc.

[Antares]

The places that always got me were the entry points to a floor. make sure you check the entry/exit points when you're scraping the map.