Posts from Current questions and answers regarding the map editor. Auto-translated

Then delete the maps.

Why delete it right away? Everyone is so harsh. I always move it to a different folder. Why delete it? So you have to search for it and download it again later?
Okay. That was just a small digression.

How does the mirrow_objects_gorizont/vertic function work? It certainly creates a cool reflection of object groups, but it doesn't save them. What should I do? Or is it just for visual effect?

Sufficient space must be provided for these reflected objects, while the cells they occupied before the reflector was used are considered blocked.

What should I do? I have a group of objects; how do I proceed? Should I copy it to a blank area, mirror it, copy it again, and then move it back to the original starting position?

Yes, but instead of copying, use the move function.

Yeah, that's what I tried. It's just not working. Or rather, I got to the last stage, but the mirrored objects don't want to return to their original position – they teleport to an intermediate point and are mirrored back from there. I guess I'm just not skilled enough and can't get it right.

Try "deselecting" them at an intermediate point. After all, the cells will be considered blocked until the objects are no longer selected.

It doesn't work; they return back.
I did it like this:
Select a group of objects -> move the group of objects to an intermediate point -> mirror the group of objects -> move the mirrored group from the intermediate point to the primary one -> deselect. Result: they fly to the intermediate point and the mirroring is reset.
I am attaching a screenshot of the initial base and the final stage; as you can see, everything is fine with the tiles. Maybe the number of objects is too high?

I tried removing the selection in the intermediate area, mirroring it, and moving it – it doesn’t work.

The "unselect" and "reselect" functions are missing after "mirror the group of objects." And it probably doesn't depend on the quantity, although they might overlap each other or something else, like this elevation...

Simple movement works; only the mirrored group doesn't want to move anywhere.

Added 4 minutes later
No, it's some kind of nonsense. It still doesn't work. I'll try with a small group of objects now.

What if you try deflecting attacks in pieces?

It works in parts, which is strange. I understand that copying doesn't work (I almost died while copy-pasting in parts), but what exactly is being reflected?

When reflecting objects, they can overlap each other, which results in the reflected version not being placeable anywhere. I just checked. This can happen even with a small group of objects.