I know there’s quite a few reflect/mirror tools out there, but I found them a little tedious to use. I always loved how blender’s “Mirror Modifier” worked, so I spent a few hours today and made a plugin for studio building that works in a similar manner.
This works in 4 easy steps
Select a model/folder you want to mirror and click “Create Mirror”
The above model I mirrored along the Y-axis, which worked well except for the mirroring of the unions that make up the hex window and surrounding walls, as you can see.
Additionally, in the GIF below, I am having issue mirroring a more complex model. Instead of mirroring, it just duplicates it.