The one that is usually used by people is the round or rectangular shape ceiling with some accent in the edges of the ceiling and in the corner of the room to place the lamp. This design is very simple but still elegant for various theme of the room. This idea is actually one of the reasons people use Knauf as the material of creating a ceiling. Knauf is a German technology that uses gypsum to create property such as ceiling. Knauf is well-known for its sturdiness and the various designs that can be created using this technology. Living Room.