Sentence:  You can then hang pictures or mirrors - whatever seems appropriate to your setting. The finishing touch is a remnant of thick foambacked carpet which greatly enhances the effect of the <WSD>roomset</WSD>, provides the model with a comfortable surface either for her feet, or to sit or lie upon, if your shot demands it, and which also serves to conceal any imperfect match between the floor and the bottoms of your flats. 
Meaning of the word marked with <WSD> tags:  A model or part of a showroom etc. furnished to look like a room in a house. (from 20th c.)