Procedural map generation around player

[opaque plover]

Im attempting to create a procedural dungeon generation system that generates the rooms at runtime in a radius around the player. As the player moves away from previous rooms said rooms unload. This is in an attempt to not have a gigant map file and also make every experiance unique.
The picture provided shows a demonstration on what it would be like. As the pint player moves the green part of the map on the left moves out of the radious and gets deleted.

What im really asking is not how to calculate the procedural generation in and of it self and rather how to best approach the map creation. Should i have one central mesh that i modify or should i rather have many small meshes that get stitched together?

[muted ice]

Either would do. Test and see for yourself.
Several meshes would have rendering costs(though potentially negligible due to batching).
One mesh on the other hand would have regeneration costs, though you could probably move it to a background thread/job.
You should probably start with getting something working first and then move from there.

[opaque plover]

Yea, the only real issue with multible meshes is the risk of z-fights. Anyhow i will start doing that since im more comfortable with it and lets see how it turns out!

[limpid plinth]

is this in 3D or 2D?

[opaque plover]

In 3D