A 3D model interior is a digital representation of the inside of a space, typically created using computer software. This type of model can show details such as furniture, lighting, decor, and even textures on walls and floors. It is commonly used by architects, interior designers, and real estate professionals to help visualize and plan their designs before construction or renovation. 3D models allow for easy modification and experimentation with different layouts and decor options, making it a valuable tool for creating spaces that are both functional and visually appealing.