How to mirror image walls?

[emil23]

Hey i would like to do symetrical walls so they look same on left and right. i tired to copy and paste them and roate horizontial before pasting, i also tired many other options vertical, roate by 90 degress but nothing seems to work, i cant find correct position. any idea?


theres link to photo from discord

https://cdn.discordapp.com/attachments/780951705822429235/810651151845294120/unknown.png

 

[Unregret]

Not my expertise but did you try use all of these tricks: World Editor Tips ?