u/Emotional-Care814

So I recently watched this movie and I can't understand the decor in the bedroom of the Bakers' new house. In the parents' bedroom, there is some strange pattern on the wall. Is it really a pattern or just the plaster peeling? I'm not sure if I can post a picture to show what I'm talking about based on the rules but anyone else who has seen the movie, can you enlighten me about this?