Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding General Tops to walls, automating/grouping

Not exactly sure what you want. But you do know following workflow?

Duplicate wall by SHIFT + dragging z axe / green arrow to correct height. Them change root template to wanted wall type. Adjust each wall part ( wheel and right click flip wall)

The group command doesn't really work for me though you can work with layers via world builder