When we say interior, we think that what will be done by beating one board after another and making a ceiling. This is a completely wrong idea. The first and foremost task of interior design is to ensure proper utilization of the space for which it is designed. Creating a work environment in the office hall, a sleeping environment in the bedroom, and a study environment in the school hall. Knowing ergonomics and working accordingly is most important for an interior designer. What is the minimum size of the furniture, how much space is required for walking or sitting, must be known for sure. Besides color, texture, scale, perspective, movement of light and air, psychology and many more. After all this if you think some ceiling and paneling is needed, then no. But if there is no need, we don't do such things by ourselves.