Wallpaper on both sides

[RustyB]

Being able to place wallpaper on both sides of a wall, not only soft side.
I think that would be a popular plugin

[Raul-Sorin Sorban]

This is not possible currently due to the way Facepunch implemented wallpapers. They're not a separate entity and the building block itself tracks the wallpaper ID and skin, within the building block logic. Meaning that if you'd want the wallpaper to be on both sides, the only way you could do that is duplicate the wall and flip it 180 degrees.

[ninco90]

Just to let you know, this is already possible with this month's update. As long as it doesn't go outside.