Map generation using the alternative IRMG map generator.

IRMG places objects on the map that were entered specifically in the Terrain Editor.
These are levels 2, 4, 5, 6, and 7. They are not present in the standard game.

I don't know how the game will behave if it finds a reference to an object that
is not in the game's resources. Most likely, it will crash with an error.

But in IRMG, there is a checkbox in the advanced options that disables the generation of new objects, which allows you to use it to play on the standard game without Terrain Editor. The Terrain Editor itself, of course, does not affect IRMG and cannot affect it because the generation is performed independently of the game.

Whether it's a single-player or multiplayer game also doesn't matter. These are full-fledged game maps.

Also, I'd like to remind you that you can edit/create a template using IRMG.
This allows you not to use existing templates that were created and balanced for the game with the Terrain Editor.