Best graphics to print for stable AR

Hello,

So I have been learning about ARKit for quite a while now 🙂 Its really incredible. I would love to ask:

What would be the best graphcis to print and put on all walls, floors, ceiling over whole huge apartment to make ARKit as stable as possible?

Also, is it good idea to do that many textured surfaces or is it better to mix with plain ones? That is the main question, however I have a few more, which are optional haha.

What is the difference between normal world tracking and tracking when world map is being created? Is the map not treated as whole during traditional tracking?

Once World Map is created and user "loads" back, is the map being extended still? Can I turn this off and non-stop rely on the created worldmap?

Can .worldmap be visualized? (I am using Unity).


Thank you.