Could you add support for surface layers/levels: Factorissimo2 mod add some with every factory, and if user goes into those factories, radar/scanner (I think) trying to reveal a chunk on current surface - the factory floor.

My suggestion: add configurable (on map tab) text property with surface name/id, with default value: "nauvis",
or just lock it on start surface without any property.

Thanks

Because now I have too many black chunks on main surface, if i trying to build something inside factories :(

Good catch! Thanks for the report.

It should be fixed now. It will remember the surface at which the player has spawned (and his/her force) and use that for the scans.

Got a crash for previous saves :) Anyway, it works for new game. It's fine for me, but try to fix for possible other angry users :)

Error while running event initial-scan::on_tick (ID 0)
initial-scan/control.lua:43: attempt to index field 'center' (a nil value)
stack traceback:
initial-scan/control.lua:43: in function 'perform_scan'
initial-scan/control.lua:63: in function <initial-scan/control.lua:60>

I apologize for the crash. I did not thought of that. :(
I personally never update mods mid-game.