You can now place your wallpaper on a wall:
It is possible to change the texture by right-clicking on the wallpaper while having another wallpaper in your hand.
When you will place another wallpaper close to an existing one, it will automatically take the same texture.
You can still change a texture by right-clicking it anytime you want.
If you have some dye, you can then color a texture by right-clicking it with dye equipped.
If you want to remove a wallpaper, you need to have the item in your hand or an axe. It is possible to combine the wallpaper with any item on the wall: Torch, Painting…