Posts from How to create a mirrored map in the editor. Auto-translated

A question arose: how can I create a mirrored map in the editor or using text files?
To be more precise, I want to create one level of a map and overlay it onto a dungeon. So that it becomes a mirror image, but twice as fast. If anyone knows a way, please let me know. I would be grateful.

You can try this.

Starting from the line "Trick six: Copying multiple objects at once from one map to another," there is a description of how to do it. I tried it myself, but only with the map surface.