The video at the link has some nice maps and scale models relating to siege warfare. The models, for the most part appear to be period, but some have many figures on them which may result from later updates of the map. The documentary is largely in french, but there are lots of pretty pictures to look at and one can marvel at the craftsmanship of the artificers who created these models to assist in planning and executing the siege.

I think this is the museum website: http://www.museedesplansreliefs.culture.fr/

Some screenshots

You can cheat and just move the large hex so it aligns properly.

I kind of like it. The paper texture makes it look like there are small rolling hills instead of just a flat plain. (Very few areas are truly flat anyway.) Now it sort of looks to me like the observer is above and looking through a curtain of smoke, which might be blowing in from off map due to massive fires set by the population as they flee to deny the incoming hordes any pasture, food, or forage. Oh, and they poisoned the wells and tried to contaminate the rivers with dead cattle.

It was a dark and grimmy sunset.

As you can sort of see here. https://cdn.mos.cms.futurecdn.net/cpXUKWoLNm2NWCgMoToHLi-970-80.jpg.webp

My point was the gray color came from really ancient volcanic flows, not anything happening now.

I prefer the original color.

Looking at it I think it is either "VGER" from Star Trek The Motion Picture or the new mounting for the evil eye thing in Lord of the Rings after the volcano blew up and in the 5372 sequel, it was built by an evil sect of cartographers seeking to redesign the world.