3D modeling is an essential tool for designing the interiors of a building, allowing architects and designers to visualize their plans in a more realistic and detailed way. It also enables easy modification of the design, saving time and resources. 3D modeling is also useful for communicating the design to the homeowner, enabling a more accurate understanding of the intended look and feel of the interiors. Overall, 3D modeling is a powerful tool for optimizing and improving the design of building interiors.